Pteridophytes of Ngengpui Wildlife Sanctuary, Mizoram, India

· Articles
Authors

Durgesh Verma1, S. K. Singh1*, B. S. Kholia2, B. K. Sinha3 & Samiran Panday4

1Botanical Survey of India, Eastern Regional Centre, Shillong-793003

2Botanical Survey of India, Sikkim Himalayan Regional Centre, Gangtok-797103

3Botanical Survey of India, Industrial Section Indian Museum, Kolkata-700016

4Botanical Survey of India, Central National Herbarium, Howrah-711103

durgesh.kv@gmail.com, bskholia_bsi@yahoo.co.in, drbks2004@yahoo.co.in, samicnh@gmail.com

*Corresponding author: S. K. Singh, email: sksbsinc@rediffmail.com

Abstract

Pteridophytic flora of Ngengpui Wildlife Sanctuary, Mizoram has been carried out. A total of 33 species belonging to 21 genera and 18 families are enumerated for the first time from the sanctuary. This includes three new distributional records viz., Nephrolepis exaltata (L.) Schott, Pleocnemia submembranacea (Hyata) Tagawa & K. Iwats. and Tectaria decurrens (C. Presl) Copel. from Mizoram, remaining all are new report to this sanctuary. An identification key along with basionym and distribution of each species in Northeast India has been provided in present communication.

Keywords Ngengpui Wildlife Sanctuary (NGWLS), Pteridophytes, Mizoram.

Introduction

Ngengpui Wildlife sanctuary lies in Lawngtlai district of Mizoram and is about 296 km far from Aizawl. It is close to Indo-Myanmar and Indo-Bangladesh border and spreads over c. 110 Sq. km area with altitude ranges from 200 – 1200 m above mean sea level. The annual rainfall ranges between 1700-3900 mm and average temperature ranges between 8-24ºC during winter and 18ºC-32ºC during summer. The vegetation is subtropical evergreen to subtropical semi evergreen type and the species like Ficus semicordata Buch.-Ham. ex Sm., Bauhinia purpurea L., Lagerstroemia indica L., Diospyros malabarica (Desr.) Kostel., Sterculia villosa Roxb., Syzygium cumini (L.) Skeels, Tectona grandis L.f., Dillenia indica L., Mesua ferrea L., Macaranga denticulata (Blume) Müll. Arg. & Mallotus roxburghianus Müll. Arg. etc. are the tree species commonly found here. Till date no detailed floristic work is available for this protected area in general and pteridophytes in particular.

During a field exploration, in month of December 2012, authors have collected pteridophytic samples from different parts of the sanctuary. The identification was made with the help of published literature and herbarium specimens deposited in Herbarium of Botanical Survey of India, Eastern Regional Centre, Shillong (ASSAM). In the enumeration, the species are arranged according to C. R. Fraser-Jenkins (2009). Species within the families and genera are listed alphabetically. The nomenclature of each species is checked in IPNI, Tropicos and The Plant List. Plant authors name follow Brummitt and Powell (1992). Based on published literature distribution of species in other N. E. States of India is also mentioned. All the studied specimens are deposited in the herbarium of the Botanical Survey of India, Eastern Regional Centre, Shillong (ASSAM).

Taxonomic Observations

Key to the families, genera and species occurring in NGWLS

1a. Plants microphyllous (Lycophytes………………………………………………………………………………………………………….2

1b. Plants megaphyllous (Ferns………………………………………………………………………………………………………………..4

2a. Microphylls without ligule………………………………………………………………………….Lycopodiaceae) Lycopodiella cernua

2b. Microphylls with ligule ………………………………………………………………………………………………… (Selaginellaceae) 3

3a. Main stem upto 150 cm, prostrate; Sporophylls monomorphic …………………………………………… Selaginella semicordata

3b. Main stem upto 10 cm, creeping; Sporophylls dimorphic………………………………………………………….. Selaginella ciliaris

4a. Stipular out growth present at the base of stipe, base of stipe and pinnae (pulvinus) swollen, sporangia in form of synangia ……………………………………………………………………………………………………………Marrattiaceae) Angiopteris helferiana

4b. Stipular out growth absent at the base of stipe, base of stipe and pinnae(pulvinus) not swollen, sporangia free not forming synangia ………………………………………………………………………………………………………………………………………….. 5

5a. Plants creeping, rachis with indeterminate growth……………………………………………………………………. (Lygodiaceae) 6

5b. Plants without creeping habit, rachis without indeterminate growth …………………………………………………………………. 7

6a. Base of segments equally lobed or winged, stalks of lamina and segments articulated at their junction, leaflets fall on maturity ………………………………………………………………………………………………………………….. Lygodium salicifolium 

6b. Base of segments unequally lobed or winged, stalks of lamina and segments not articulated at their junction, leaflets do not fall on maturity ……………………………………………………………………………………………………………. Lygodium flexuosum

7a. Plants dichotomously forked at each node, rachis growth arrested and forming a dormant bud at every fork ………………….. ………………………………………………………………………………………………………. (Gleicheniaceae) Dicranopteris lanigera

7b. Plants not dichotomously forked at each node, rachis growth not arrested ……………………………………………………….. 8

8a. Rhizome creeping, sori exindusiate ……………………………………………………………………………………………………… 9

8b. Rhizome erect, sori indusiate……………………………………………………………………………………………………………..11

9a. Stipe articulated on rhizome ………………………………………………………………………………………… (Polypodiaceae) 10

9b. Stipe not articulated on rhizome………………………………………………………………………………….(Lomariopsidaceae) 31

10a. Fronds pinnatifid, dimorphic with nest leaves and normal leaves, sori in two rows ………………………… Drynaria propinqua

10b. Fronds simple dimorphic with fertile and sterile leaves, nest leaves absent, sori scattered in many rows on the under surface of fertile leaves ………………………………………………………………………………………….. Leptochilus pedunculatus

11a. Lamina one cell thick, filmy, sori on marginal cups ………………………… (Hymenophyllaceae) Trichomanes campanulatum

11b. Lamina many cells thick, sori on under surface of lamina not on marginal cups ……………………………………………….. 12

12a. Tree ferns with tall trunk and crown of leaves ………………………………………………….. (Cyatheaceae) Cyathea gigantea

12b. Ferns without tree habit ………………………………………………………………………………………………………………… 13

13a. Sori marginal or submarginal ………………………………………………………………………………………………………….. 14

13b. Sori on under surface of lamina ……………………………………………………………………………………………………….. 17

14a. Sori discrete ……………………………………………………………………………………………………………………………… 15

14b. Sori continuous ………………………………………………………………………………………………………………………….. 16

15a. Sori in marginal or submarginal cups, segments truncate at apex, indusia half cup shaped ………….. (Dennstaedtiaceae) Microlepia rhomboidea

15b. Sori marginal covered by infolded lamina margins ………………………………………… (Adiantaceae) Adiantum philippiense

16a. Veins anastomosing, indusia absent …………………………………………………………… (Lindsaeceae) Lindsaea ensifolia 

16b. Veins free, pseudoindusia present ………………………………………………………….. (Pteridaceae) Pteris pseudopellucida

17a. Sori linear or oblong along the veins …………………………………………………………………………………………………. 18

17b. Sori circular or round reniform on the veins …………………………………………………………………………………………. 20

18a. Sori double one on acroscopic side of vein and other on basioscopic side, stipe with a single gutter shaped vascular bundle …………………………………………………………………………………………………………. (Woodsiaceae) Diplazium esculentum

18b. Sori only on acroscopic side of veins, stipe with two vascular bundles ……………………………………….. (Aspleniaceae) 19

19a. Plants simple, lineae or lanceolate ………………………………………………………………………………. Asplenium phyllitidis

19b. Plants pinnate, lamina oblong, pinnae hassle shaped …………………………………………………………. Asplenium excisum

20a. Sori circular, medial, leaflets or pinnules not falling on maturity ………………………………………………………………….. 21

20b. Sori reniform, submarginal, leaflets deciduous on maturity ……………………………………………………………………….. 30

21a. Lamina hairy ……………………………………………………………………………………………………… (Thelypteridaceae) 22

21b. Lamina without hairs ……………………………………………………………………………………………… (Dryopteridaceae) 25

22a. Plants tripinnate, stipe and rachis scaly, hairy, spiny and muricated ………………………………………….. Thelypteris ornata

22b. Plants once pinnate, stipe with scales and hairs only ………………………………………………………………………………. 23

23a. Lower veins anastomosing, upper free ………………………………………………………………………………………………. 24

23b. All the veins anastomosing, pneumatophores present at the base of each pinnae ………………………… Thelypteris nudata

24a. Rhizome thin and long creeping, lower 5-7 pairs of veins anastomosing and upper 2-4 free, texture hard chartaceous …………………………………………………………………………………………………………………………………… Thelypteris arida

24b. Rhizome suberect or ascending, lower 1-1½ pairs of veins anastomosing, next falls in the sinus membrane and remaining 4-6 pairs free ………………………………………………………………………………………………………………. Thelypteris dentata

25a. Veins free ………………………………………………………………………………………………………………. Dryopteris sparsa

25b. Veins reticulate ………………………………………………………………………………………………………………………….. 26

26a. A tooth is present at the sinus of each lobe ……………………………………………………….. Pleocnemia submembranacea

26b. Sinus teeth are absent …………………………………………………………………………………………………….. (Tectaria) 27

27a. Plants unipinnate ………………………………………………………………………………………………………………………… 28

27b. Plants 2-4 pinnate ……………………………………………………………………………………………………………………….. 29

28a. Lamina not decurrent on stipe hence stipe without wing, basal basiscopic segments generally forked basically …………….. ……………………………………………………………………………………………………………………………… Tectaria polymorpha

28b. Lamina decurrent on stipe, stipe broadly winged, basal basiscopic segment generally not forked or entire …………………… ………………………………………………………………………………………………………………………………… Tectaria decurrens

29a. Plants small, 2 pinnate…………………………………………………………………………………………………. Tectaria fuscipes

29b. Plants large, 3-4 pinnate …………………………………………………………………………………………….Tectaria coadunata

30a. Margins of segments undulate or deeply lobed ………………………………………………………………. Nephrolepis undulata

30b. Margins of segments entire or crenate …………………………………………………………………………. Nephrolepis exaltata

31a. Plants trifoliate to pentafoliate, segments or pinnae lanceolate entire, terminal segments prolonged and gammiferous …….. …………………………………………………………………………………………………………………………………. Bolbitis heteroclita

31b. Plants pinnate, terminal pinnae not prolonged, gammae present or absent ……………………………………………………. 32

32a. Fertile pinnae or segments or pinnae entire, acute at apex ……………………………………………………….. Bolbitis costata

32b. Fertile pinnae or segments beaded ………………………………………………………………………………….. Bolbitis nodiflora

Enumeration of Families, Genera and Species

LYCOPODIACEAE

Lycopodiella cernua (L.) Pic. Serm. Webbia 23(1): 166. 1968. [Basionym: Lycopodium cernuum L., Sp. Pl. 2: 1103. 1753.]

Distribution: Arunachal Pradesh (Singh & Panigrahi, 2005), Assam (Borthakur et al., 2001), Manipur (Malick & Safui, 1987), Meghalaya (Baishya & Rao, 1982), Mizoram (Fischer, 1938), Nagaland (Ghosh et al., 2004), Sikkim (Mehra & Bir, 1964; Kholia, 2010), Tripura (Deb, 1981).

Specimen examined: NGWLS, 01.12.2012, S. K. Singh & party 104040.

SELAGINELLACEAE

Selaginella ciliaris (Retz.) Spring, Bull. Acad. Roy. Sci. Bruxelles 10 (1): 231, no. 136. 1843. [Basionym: Lycopodium ciliare Retz., Observ. Bot. 5: 32. 1789.]

Distribution: Assam (Alston, 1945), Manipur (Ghosh et al., 2004) Meghalaya (Baishya & Rao, 1982), Mizoram (Sharma et al., 2013), Sikkim, (Dixit, 1984), Tripura (Alston, 1945).

Specimen examined: NGWLS, 01.12.2012, S. K. Singh & party 104037.

Selaginella semicordata (Wall. ex Hook. et Grev.) Spring, Mart. Fl. Bras. 1 (2): 122. 1840.

Distribution: Arunachal Pradesh (Singh & Panigrahi, 2005), Assam (Alston, 1945), Meghalaya (Baishya & Rao, 1982), Nagaland (Ghosh et al., 2004), Mizoram (Deb & Dutta, 1987), Sikkim (Ghosh et al., 2004), Tripura (Deb, 1981).

Specimen examined: NGWLS, 01.12.2012, S. K. Singh & party 1260100.

MARRATTIACEAE

Angiopteris helferiana C. Presl, Suppl. Tent. Pterid. 22. 1845.

Distribution: Arunachal Pradesh (Singh & Panigrahi, 2005), Assam (Borthakur et al., 2001), Manipur (Malick & Safui, 1987), Meghalaya Baishya & Rao, 1982), Mizoram (Gage, 1901), Nagaland (Jamir & Rao, 1988), Sikkim (Mehra & Bir, 1964 as Angiopteris evecta (G. Forst.) Hoffim.; Kholia, 2010), Tripura (Deb, 1981).

Specimen examined: NGWLS, 01.12.2012, S. K. Singh & party 104033.

LYGODIACEAE

Lygodium flexuosum (L.) Sw., J. Bot. (Schrader) 1800 (2): 106. 1801. [Basionym: Ophioglossum flexuosum L., Sp. Pl. 2: 1063. 1753.]

Distribution: Arunachal Pradesh (Singh & Panigrahi, 2005), Assam (Borthakur et al., 2001), Manipur (Clarke, 1890), Meghalaya (Baishya & Rao, 1982), Mizoram (Fischer, 1938), Nagaland (Jamir & Rao, 1988), Sikkim (Mehra & Bir, 1964; Kholia, 2010), Tripura (Deb, 1981).

Specimen examined: NGWLS, 01.12.2012, S. K. Singh & party 104023.

Lygodium salicifolium C. Presl, Suppl. Tent. Pterid. 102. 1845.

Distribution: Arunachal Pradesh (Singh & Panigrahi, 2005), Assam (Bir et al., 1989), Manipur (Ghosh et al., 2004), Meghalaya (Ghosh et al., 2004), Mizoram (Ghosh et al., 2004), Nagaland (Ghosh et al., 2004), Sikkim (Ghosh et al., 2004), Tripura (Ghosh et al., 2004).

Specimen examined: NGWLS, 01.12.2012, S. K. Singh & party 104022.

GLEICHENIACEAE

Dicranopteris lanigera (D. Don) Fraser-Jenk., Taxon. Revis. Indian Subcontinental Pteridophytes 35. 2008. [Basionym: Gleichenia lanigera D. Don, Prodr. Fl. Nepal. 17. 1825.]

Distribution: Mizoram (Benniamin, 2012), throughout NE India.

Specimen examined: NGWLS, 01.12.2012, S. K. Singh & party 126096.

Note: The study of herbarium specimens deposited at ASSAM which was subsequently determined by C.R. Fraser-Jenkins in 2009, reveals that many reports as D. linearis (Burm. f.) Underw. and its varieties from Arunachal Pradesh, Assam, Manipur, Meghalaya belongs to this species.

POLYPODIACEAE

Drynaria propinqua (Wall. ex Mett.) Bedd., Ferns Brit. India 1: 160, pl. 160. 1866. [Basionym: Polypodium propinquum Wall. ex Mett., Abh. Senckenberg. Naturf. Ges. 1: 120, pl. 3, f. 50. 1856.]

Distribution: Arunachal Pradesh (Singh & Panigrahi, 2005), Assam (Borthakur et al., 2001), Manipur (Bir et al., 1989), Meghalaya (Baishya & Rao, 1982), Mizoram (Chandra & Chandra, 1983), Nagaland (Jamir & Rao, 1988), Sikkim (Mehra & Bir, 1964; Kholia, 2010), Tripura (Deb, 1981).

Specimen examined: NGWLS, 01.12.2012, S. K. Singh & party 104028.

Leptochilus pedunculatus (Hook. & Grev.) Fraser- Jenk., Taxon. Revis. Indian Subcontinental Pteridophytes 8 Keanean Journal of Science Vol. 2 2013 62. 2008. [Basionym: Ceterach pedunculatum Hook. & Grev., Icon. Filic. 1(1): pl. 5. 1827.]

Distribution: Arunachal Pradesh (Singh & Panigrahi, 2005), Assam (Borthakur et al., 2001), Meghalaya (Baishya & Rao, 1982), Mizoram (Verma et al., in press), Nagaland (Jamir & Rao, 1988), Sikkim (Mehra & Bir, 1964 as Colysis pedunculata (Hook. & Grev.) Ching; Kholia, 2014).

Specimen examined: NGWLS, 01.12.2012, S. K. Singh & party 104030.

HYMENOPHYLLACEAE

Trichomanes campanulatum Roxb., Calc. Journ. 4: 518. 1844.

Distribution: Arunachal Pradesh (Singh & Panigrahi, 2005), Mizoram, Sikkim (Kholia, 2014).

Specimen examined: NGWLS, 01.12.2012, S. K. Singh & party 104036.

Notes: Herbarium as well as the literature survey reveals that this species is comparatively little known species of pteridophytes in Northeast India and only reported from Arunachal Pradesh only. This species was recorded from Mizo hills as Mecodium exsertum (Wall. ex Hook.) Copel., (which is synonym of Hymenophyllum exsertum Wall. ex Hook.), causing a source of confusion to the researchers as both the species distinctly treated not only species but genus level as well. Thus the current report authenticates its distribution in the state of Mizoram.

CYTHEACEAE

Cyathea gigantea (Wall. ex Hook.) Holttum, Gard. Bull. Straits Settlem. 8(4): 318. 1935. [Basionym: Alsophila gigantea Wall. ex Hook., Sp. Fil. 1: 53. 1844.]

Distribution: Arunachal Pradesh (Ghosh et al., 2004), Assam (Borthakur et al., 2001), Manipur (Malick & Safui, 1987), Meghalaya (Baishya & Rao, 1982), Mizoram (Ghosh et al., 2004), Nagaland (Jamir & Rao, 1988), Sikkim (Ghosh et al., 2004; Kholia, 2010), Tripura (Deb, 1981).

Specimen examined: NGWLS, 01.12.2012, S. K. Singh & party 104021.

DENNSTAEDTIACEAE

Microlepia rhomboidea (Wall. ex Kunze) Prantl, Arbeiten Königl. Bot. Gart. Breslau 1: 31. 1892. [Basionym: Davallia rhomboidea Wall. ex Kunze, Bot. Zeitung (Berlin) 8: 158. 1850.]

Distribution: Arunachal Pradesh (Singh & Panigrahi, 2005), Assam (Ghosh et al., 2004), Meghalaya (Ghosh et al., 2004), Mizoram (Benniamin, 2012), Sikkim (Ghosh et al., 2004).

Specimen examined: NGWLS, 01.12.2012, S. K. Singh & party 126098.

LINDSAECEAE

Lindsaea ensifolia Sw., J. Bot. (Schrader) 1800 (2): 77. 1801.

Distribution: Arunachal Pradesh (Singh & Panigrahi, 2005), Assam (Borthakur et al., 2001), Manipur (Kachroo et al., 1989), Meghalaya (Baishya & Rao, 1982), Mizoram (Chandra & Chandra, 1983), Nagaland (Jamir & Rao, 1988), Sikkim (Beddome, 1883), Tripura (Kachroo et al., 1989).

Specimen examined: NGWLS, 01.12.2012, S. K. Singh & party 104020.

PTERIDACEAE

Pteris pseudopellucida Ching, Lingnan Sci. J. 15 (3): 395. 1936.

Distribution: Arunachal Pradesh (Singh & Panigrahi, 2005), Assam (Ghosh et al., 2004), Meghalaya (Ghosh et al., 2004), Mizoram (Ghosh et al., 2004).

Specimen examined: NGWLS, 01.12.2012, S. K. Singh & party 104024.

ADIANTACEAE

Adiantum philippinense L., Sp. Pl. 2: 1094. 1753.

Distribution: Throughout NE India (Ghosh et al. 2004).

Specimen examined: NGWLS, 01.12.2012, S. K. Singh & party 104032.

ASPLENIACEAE

Asplenium excisum C. Presl, Abh. Königl. Böhm. Ges. Wiss., ser. 5, 6: 434. 1851.

Distribution: Arunachal Pradesh (Singh & Panigrahi, 2005), Assam (Vasudeva et al., 1990), Manipur (Vasudeva et al., 1990), Meghalaya (Vasudeva et al., 1990), Mizoram (Chandra & Chandra, 1983), Sikkim (Kholia, 2014).

Specimen examined: NGWLS, 01.12.2012, S. K. Singh & party 104038.

Asplenium phyllitidis D. Don, Prodr. Fl. Nepal. 7. 1825.

Distribution: Assam (Borthakur et al., 2001), Meghalaya (Baishya & Rao, 1982), Mizoram (Benniamin, 2012), Nagaland (Jamir & Rao, 1988), Sikkim (Kholia, 2014).

Specimen examined: NGWLS, 01.12.2012, S. K. Singh & party 104026.

THELYPTERIDACEAE

Thelypteris arida (D. Don) C. V. Morton, Amer. Fern J. 49 (3): 113. 1959. [Basionym: Aspidium aridum D. Don, Prodr. Fl. Nepal. 4. 1825.].

Distribution: Arunachal Pradesh (Singh & Panigrahi, 2005), Assam (Borthakur et al., 2001), Manipur (Malick & Safui, 1987), Meghalaya (Singh & Panigrahi, 2005), Mizoram (Fischer, 1938), Sikkim (Mehra & Bir, 1964 as Cyclosorus aridus (D. Don) Tagawa; Kholia, 2014).

Specimen examined: NGWLS, 01.12.2012, S. K. Singh & party 104018.

Thelypteris dentata (Forssk.) E. P. St. John, Amer. Fern J. 26 (2): 44. 1936. [Basionym: Polypodium dentatum Forssk., Fl. Aegypt.-Arab. 185. 1775].

Distribution: Arunachal Pradesh (Singh & Panigrahi, 2005), Assam (Borthakur et al., 2001), Meghalaya (Baishya & Rao, 1982), Mizoram (Benniamin, 2012), Nagaland (Jamir & Rao, 1988), Tripura (Kachroo et al., 1989), Sikkim (Mehra & Bir, 1964 as Cyclosorus dentatus (Forssk.) Ching); Kholia, 2014).

Specimen examined: NGWLS, 01.12.2012, S. K. Singh & party 126099.

Thelypteris nudata (Roxb.) C. V. Morton, Contr. U. S. Natl. Herb. 38 (7): 352. 1974. [Basionym: Polypodium nudatum Roxb., Calcutta J. Nat. Hist. 4: 491. 1844.]

Distribution: Arunachal Pradesh (Singh & Panigrahi, 2005), Assam (Borthakur et al., 2001), Manipur (Malick & Safui, 1987), Meghalaya (Baishya & Rao, 1982), Mizoram (Chandra & Chandra, 1983), Nagaland (Jamir & Rao, 1988), Sikkim (Mehra & Bir, 1964; Kholia, 2014), Tripura (Kachroo et al., 1989).

Specimen examined: NGWLS, 01.12.2012, S. K. Singh & party 126095.

Thelypteris ornata (J. Sm.) Ching, Bull. Fan Mem. Inst. Biol., Bot. 6 (5): 346-347. 1936. [Basionym: Phegopteris ornata Wall. ex J. Sm., Hist. Fil. 233. 1875.]

Distribution: Arunachal Pradesh (Singh & Panigrahi, 2005), Mizoram (Fischer, 1938), Tripura (Kachroo et al., 1989), Sikkim (Mehra & Bir, 1964; Kholia, 2014).

Specimen examined: NGWLS, 01.12.2012, S. K. Singh & party 104042.

WOODSIACEAE

Diplazium esculentum (Retz.) Sw., J. Bot. (Schrader) 1801 (2): 312. 1803. [Basionym: Hemionitis esculenta Retz., Observ. Bot. 6: 38. 1791.]

Distribution: Arunachal Pradesh (Singh & Panigrahi, 2005), Assam (Borthakur et al., 2001), Manipur (Malick & Safui, 1987), Meghalaya (Baishya & Rao, 1982), Mizoram (Benniamin, 2012), Nagaland (Jamir & Rao, 1988), Sikkim (Mehra & Bir, 1964; Kholia, 2010), Tripura (Deb, 1981).

Specimen examined: NGWLS, 01.12.2012, S. K. Singh & party 126097.

DRYOPTERIDACEAE

Dryopteris sparsa (D. Don) Kuntze, Revis. Gen. Pl. 2: 813. 1891. [Basionym: Nephrodium sparsum D. Don, Prodr. Fl. Nepal. 6. 1825.]

Distribution: Arunachal Pradesh (Singh & Panigrahi, 2005), Assam (Borthakur et al., 2001), Manipur (Vasudeva et al., 1990), Meghalaya (Baishya & Rao, 1982), Mizoram (Fischer, 1938), Nagaland (Clarke, 1890), Sikkim (Mehra & Bir, 1964; Kholia, 2010).

Specimen examined: NGWLS, 01.12.2012, S. K. Singh & party 104041.

Pleocnemia submembranacea (Hyata) Tagawa & K. Iwats., Acta Phytotax. Geobot. 26(1-2): 61. 1974. [Basionym: Aspidium submembranaceum Hayata, Icon. Pl. Formosan. 4: 188-189, f. 126. 1914.]

Distribution: Arunachal Pradesh (Singh & Panigrahi, 2005 as Pleocnemia winitii Holttum), Assam (Borthakur, et al., 2001 as Pleocnemia winitii Holttum), Mizoram, Sikkim (Singh & Panigrahi, 2005 as Pleocnemia winitii Holttum).

Specimen examined: NGWLS, 01.12.2012, S. K. Singh & party 126094.

Tectaria coadunata (Wall. ex Hook. & Grev.) C. Chr., Contr. U.S. Natl. Herb. 26 (6): 331. 1931. [Basionym: Aspidium coadunatum Wall. ex Hook. & Grev., Icon. Filic. 2(11): 202. 1831.]

Distribution: Arunachal Pradesh (Singh & Panigrahi, 2005), Assam (Borthakur et al., 2001), Mizoram (Benniamin, 2012), Sikkim (Kholia, 2010).

Specimen examined: NGWLS, 01.12.2012, S. K. Singh & party 104027.

Tectaria decurrens (C. Presl) Copel., Leafl. Philipp. Bot. 1 (13): 234. 1907. [Basionym: Aspidium decurrens C. Presl, Reliq. Haenk. 1 (1): 28. 1825.]

Distribution: Arunachal Pradesh (Singh & Panigrahi, 2005), Mizoram (Present report).

Specimen examined: NGWLS, 01.12.2012, S. K. Singh & party 126092.

Tectaria fuscipes (Wall. ex Bedd.) C. Chr., Contr. U.S. Natl. Herb. 26(6): 290. 1931. [Basionym: Aspidium fuscipes Wall. ex Bedd., Suppl. Ferns Brit. Ind. 15, pl. 366. 1876.]

Distribution: Arunachal Pradesh (Singh & Panigrahi, 2005), Assam (Borthakur et al., 2001 as Ctenitopsis fuscipes (Wall. ex Bedd.) Ching), Meghalaya (Baishya & Rao, 1982), Mizoram (Chandra & Chandra, 1983), Nagaland (Jamir & Rao, 1988), Sikkim (Mehra & Bir, 1964; Kholia, 2010).

Specimen examined: NGWLS, 01.12.2012, S. K. Singh & party 104039.

Tectaria polymorpha (Wall. ex Hook.) Copel., Philipp. J. Sci. 2 (6): 413. 1907. [Basionym: Aspidium polymorphum Wall. ex Hook., Sp. Fil. 4: 54-55. 1862.]

Distribution: Arunachal Pradesh (Singh & Panigrahi, 2005), Assam (Borthakur et al., 2001), Manipur (Malick & Safui, 1987), Meghalaya (Baishya & Rao, 1982), Mizoram (Fischer, 1938), Nagaland (Jamir & Rao, 1988), Sikkim (Kholia, 2010), Tripura (Deb, 1981).

Specimen examined: NGWLS, 01.12.2012, S. K. Singh & party 104034.

OLEANDRACEAE

Nephrolepis exaltata (L.) Schott, Gen. Fil. pl. 3. 1834. [Basionym: Polypodium exaltatum L., Syst. Nat. (ed. 10) 2: 1326. 1759.]

Distribution: Arunachal Pradesh (Singh & Panigrahi, 2005), Assam (Borthakur et al., 2001), Mizoram (Present report), Tripura (Vasudeva et al., 1990).

Specimen examined: NGWLS, 01.12.2012, S. K. Singh & party 126093.

Nephrolepis undulata (Afzel. ex Sw.) J. Sm., Bot. Mag. 35 bis. 1846. [Basionym: Aspidium undulatum Afzel. ex Sw., J. Bot. (Schrader) 1800 (2): 32. 1801.]

Distribution: Mizoram.

Specimen examined: NGWLS, 01.12.2012, S. K. Singh & party 104043.

Note: Literature survey reveals that this is a very little known species and reported from Western ghats (Maharashtra, Karnataka, Kerala, Tamil Nadu) in India (Patil & Dongare, 2014). A specimen (23214) of this species [named as Nephrolepis delicatula (Decne.) Pic.-Serm.] is traced during the scrutiny of Herbarium (ASSAM) which was collected from Lushai hills by God Fray Missionery in 1952. Specimen available at ASSAM is duly authenticated by C.R. Fraser-Jenkins in the year 2009 as Nephrolepis undulata. Our plants are showing similarity in almost all the major characters of the species, hence we are treating our plant as Nephrolepis undulata. It is interesting to note that the present report facilitate the second collection available for all Northeastern sates of India.

LOMARIOPSIDACEAE

Bolbitis costata Ching ex C. Chr., Index Filic., Suppl. 3, 47. 1934.

Distribution: Arunachal Pradesh (Singh & Panigrahi, 2005), Assam (Borthakur et al., 2001), Meghalaya (Vasudeva et al., 1990), Nagaland (Singh & Panigrahi, 2005), Mizoram (Benniamin, 2012), Sikkim (Singh & Panigrahi, 2005), Tripura (Deb, 1981).

Specimen examined: NGWLS, 01.12.2012, S. K. Singh & party 104025.

Bolbitis heteroclita (C. Presl) Ching, Index Filic., Suppl. 3, 48. 1934. [Basionym: Acrostichum heteroclitum C. Presl, Reliq. Haenk. 1 (1): 15, pl. 2. 1825.]

Distribution: Arunachal Pradesh (Singh & Panigrahi, 2005), Assam (Borthakur et al., 2001), Meghalaya (Vasudeva et al., 1990), Nagaland (Jamir & Rao, 1988), Mizoram (Fischer, 1938), Sikkim (Mehra & Bir, 1964), Tripura (Deb, 1981).

Specimen examined: NGWLS, 01.12.2012, S. K. Singh & party 104031.

Bolbitis nodiflora Fraser-Jenk., New Sp. Syndr. Indian Pteridol. 65. 1997. [Basionym: Polybotrya nodiflora Bory, Voy. Indes Or. (Bélanger) 2. 17. 1833.]

Distribution: Arunachal Pradesh (Benniamin, 2010), Meghalaya (Nayar & Kaur, 1964 as Egenolfia vivipara (Hook.) C. Chr.), Nagaland (Chandra et al., 2008), Mizoram (Sharma et al., 2013), Tripura (Deb, 1981 as E. appendiculata (Willd.) J. Sm. var. vivipara Ham. ex Hook).

Specimen examined: NGWLS, 01.12.2012, S. K. Singh & party 104035.

Acknowledgement

Authors are grateful to Director, Botanical Survey of India, Kolkata and to H.O.O., BSI, Eastern Regional Centre, Shillong for facilities and encouragements and to the officials of Forest Department of Mizoram for rendering the logistic support during field exploration.

References

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