Pteridophytes of Tawi Wildlife Sanctuary, Mizoram, India

· Articles
Authors

S.K. SINGH1*, D.VERMA1, B.S. KHOLIA2, S. SHARMA1, B.K. SINHA3 & S. PANDEY4

1Botanical Survey of India Eastern Regional Centre, Shillong-793003
2Botanical Survey of India, Northern Regional Centre Dehradun-248195
3Industrial Section Indian Museum, Kolkata-700016
4Central National Herbarium, Howrah-711103
*Corresponding author S.K.Singh; email: sksbsinc@rediffmail.com

Abstract

A preliminary survey on pteridophytic flora of Tawi Wildlife Sanctuary, Mizoram has been carried out and a total of 37 taxa are enumerated. This includes 11 taxa viz., Microlepia firma Mett. ex Kuhn, Lindsaea odorata Roxb., Aleuritopteris subdimorpha (C.B. Clarke & Baker) Fraser-Jenk., Coniogramme serrulata Fee, Pteris arisanensis Tagawa, P. subindivisa C.B. Clarke, Asplenium yoshinagae Makino subsp. yoshinagae, A. yoshinagae subsp. indicum (Sledge) Fras.-Jenk., Thelypteris esquirolii (Christ) Ching, T. hispidula (Decne.) C.F. Reed, Athyrium setiferum C.Chr., and A. woodsioides Christ, new record for the state of Mizoram. An identification key of the species found there, the correct name, habitat, distribution with in the North-eastern states have been provided in this communication.

Keywords Tawi Wildlife Sanctuary (TWLS), Pteridophytes, Mizoram.

Introduction

Tawi Wildlife sanctuary located in Aizawl district of Mizoram and is about 110 km from Aizawl. It spreads over c. 35 sq. km of area with altitude upto1700 m above mean sea level at 23°33′ N latitude 92°56′ E longitude. Flora of Tawi Wildlife Sanctuary mainly comprises Tropical Evergreen forest, Semi Evergreen and Scrub forests. The forests of this protected area are quite rich and unexplored and harbour a unique and diversified flora. The flowering plants species commonly distributed here are Gmelina arborea Roxb., Schima wallichii Choisy, Magnolia champaca (L.) Baill. ex Pierre, Parkia roxburghii G.Don, Macaranga denticulata (Blume) Müll.Arg., Callicarpa arborea Roxb., Buddleja asiatica Lour. etc. Several species of orchid’s viz., Dendrobium densiflorum Lindl., Oberonia pachyrachis Rchb.f. ex Hook.f., Epigeneium naviculare (N.P.Balakr. & Sud. Chowdhury) Hynn. & Wadhwa, Bulbophyllum leopardinum (Wall.) Lindl. ex wall., Eria pannea Lindl., Papilionanthe teres (Roxb.) Schltr. etc., and species of bamboos and canes can be commonly seen. Recently, the authors recorded a unique plant Sapria himalayana Griff. – a root parasite from this sanctuary. As far as Pteridophytic flora of this sanctuary is concerned, there appears no working list is available from here, though recently authors and others have published some articles on different protected areas of State, wherein Pteridophytes are recorded (Singh et al., 2010; Barbhuiya et al., 2011; Kumar et al., 2012; Benniamin 2012; Barbhuiya & Singh 2013, 2014; Pandey et al., 2013; Sharma et al., 2013, 2014; Verma et al., 2013, 2014a, b).

During month of December 2012, a field exploration made by the authors and material were collected from the sanctuary area. 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). A total of 37 taxa have been identified which includes 11 new records for the state of Mizoram. Taxa newly recorded from the State are marked with asterisk (*). In the enumeration, the species are arranged according to C. R. Fraser-Jenkins (2009). Species within the families and genera are listed alphabetically. Plant authors name follow Brumitt and Powell (1992). Distribution of each species in other North-eastern States of India is being given basing published literature and Herbarium study. A field key for the easy identification is also given. All the studied specimens are deposited in the herbarium of the Botanical Survey of India, Eastern Regional Centre, Shillong (ASSAM).

Key to the species

1a. Plants microphyllous, with mid vein only, spore bearing organ sporangia arises  in the axils of microphylls …………………………2

1b.  Plants megaphyllous, with well-developed venation, spore bearing organs are generally sori and arises on the undersurface of lamina  …………………………………………………………………………………………………………………………………………………. 5

2a. Microphylls are spirally arranged on stem, eligulate…………………………………………………………………………………………..3

2b Microphylls are in 4 rows (two lateral & two dorsal), ligulate …………………………………………………………………………………4

3a.  Plants without definite cone, sporangia arises throughout the length of stem on axil of normal leaves……………………………… ………………………………………………………………………………………………………………………………….Huperzia pulcherrima

3b. Sporangia arises on the terminal compact cones, microphylls and sporophyll not similar ………………………Lycopodiella cernua

4a. Frond with long unbranched lower stem; rhizophores restricted at the base only ……………………………… Selaginella involvens

4b. Frond with a small lower stem, lamina branches from the base, rhizophores scattered throughout the length of stem and rachis ………………………………………………………………………………………………………………………………….. Selaginella vaginata

5a. Plants dimorphic, fertile lamina contracted, sori acrostichoid and scattered throughout the lower surface of fertile lamina, spine is present at the sinus of two veins on leaf margin ……………………………………………………………………………….. Bolbitis sinensis

5b. Plants monomorphic with similar fertile and sterile leaves, sori arraned in definite pattern not acrostichoid or scattered spine is absent at sinus…………………………………………………………………………………………………………………………………………6

6a. Sori exindusiate …………………………………………………………………………………………………………………………………..7

6b. Sori with indusial or covering …………………………………………………………………………………………………………………..12

7a. Fronds  simple  ……………………………………………………………………………………………………………………………………8

7b. Fronds  pectinate of once pinnate  …………………………………………………………………………………………………………….11

8a.   Fronds thick leathery, soft, densely covered by thick woolly tomentose hairs and stellate armed hairs on both surfaces………….. ……………………………………………………………………………………………………………………………………… Pyrrosia flocculosa

8b. Fronds thin chartaceous, without hairs, but may be sparse scaly …………………………………………………………………………9

9a. Sori in many rows scattered on under surface of lamina ………………………………………………………… Tricholepidium normale

9b. Sori in two rows one on either side of mid rib ………………………………………………………………………………………………..10

10a. Fronds thin papyraceous, leaf seasonal, falls in winter, sori medial, scattered throughout the length of lamina, distant from each other …………………………………………………………………………………………………………………………Lepisorus scolopendrium

10b.  Fronds thick coriaceous, winter green, curled up on dry season, sori towards the midrib, very close often touching each other  ……………………………………………………………………………………………………………………………………Lepisorus sublinearis

11a. Fronds once pinnate, pinnae 3-5 cm broad, sori linear along main vein ………………………………………….Leptochilus ellipticus

11b. Fronds pectinate, pinnae 1-1.5 cm broad, sori round, arised on included veinlet of basal areoles ………………………………….. …………………………………………………………………………………………………………………………………Polypodiodes amoena

12a.  Filmy ferns with only one cell thick papery lamina ……………………………………………………….Hymenophyllum denticulatum

12b.  Plants without filmy habit, more than one cell thick lamina ………………………………………………………………………………13

13a. Sori marginal or submarginal (except Coniogramme)……………………………………………………………………………………..14

13b. Sori medial on under surface of lamina………………………………………………………………………………………………………27

14a.  Sori marginal ……………………………………………………………………………………………………………………………………15

14b.  Sori submarginal ……………………………………………………………………………………………………………………………….18

15a. Fronds and segments flabellulate ……………………………………………………………………………………………………………16

15b.  Fronds not flabellulate ………………………………………………………………………………………………………………………..21

16a.  Sori marginal on under surface of lamina, covered by single indusial flap, open towards under surface ….Adiantum philippense

16b. Sori terminal on margins, indusium attached at the base or also at the sides, opening towards the margin ……………………..17

17a Fronds once pinnate, small to 20 cm, linear-lanceolate ……………………………………………………………… Lindsaea odorata

17b Fronds 2-4 pinnate, 40-80 cm, ovate  …………………………………………………………………………….. Odontosoria chinensis

18a. Sori linear at the margin of segments ……………………………………………………………………………….. Pteridium revolutum

18b. Sori pouch shaped on under surface of lamina ……………………………………………………………………………………………19

19a. Frond bipinnate, pinnule-apices obtuse ………………………………………………………………………………. Microlepia strigosa

19b. Frond 3-4 pinnate, pinnule-apices acute …………………………………………………………………………………………………..20

20a. Under surface of lamina with very dense long strigose hairs  …………………………………………………………Microlepia firma

20b.  Hairs confined to veins on under surface …………………………………………………………………………….. Microlepia hancei

21a. Stipe purple or ebeneus, polished, lamina with white or silver coloured farina on under surface …….Aleuritopteris subdimorpha

21b. Stipe straminoeus, lamina without farinose compound on undersurface ……………………………………………………………22

22a.  Sori grows on undersurface of lamina along the veins ……………………………………………………….. Coniogramme serrulata

22b. Sori marginal on pinnules …………………………………………………………………………………………………………………….23

23a.  Lamina remarkable tricoloured on upper surface with a narrow white streak near midrib, followed by pink line and outer green towards margins ………………………………………………………………………………………………………………………….Pteris tricolor

23b. Lamina green on upper surface not tricolour ……………………………………………………………………………………………..24

24a. Basal veins of two segments anastomosing and forming a costal areoles below the sinus more closely to the pinna-costa        ………………………………………………………………………………………………………………………………………….Pteris biaurita

24b.  Veins free not anastomosing…………………………………………………………………………………………………………………25

25a. Costa with a wide lamina, basal pair of vein curved and falls at the base of sinus but fused, forming an open triangular false areole ………………………………………………………………………………………………………………………………  Pteris arisanensis

25b. Costal wing absent, vein not curved, falls above the sinus ………………………………………………………………………………26

26a.  Plant with 12-17 pairs of pinnae, setaceous on upper surface, setae at the junction of costa and midrib, pinnules abruptly apiculate at apex …………………………………………………………………………………………………………..Pteris aspericaulis

26b.  Plant with 3-6 pairs of pinnae, seta absent on upper surface, pinnules not apiculate at apex ………………….. Pteris subindivisa

27a. Scales clathrate, sori long linear along the veins  ………………………………………………………………………………………… 28

27b. Scales not clathrate, sori round or oblong, on or long veins  ……………………………………………………………………………..29

28a. Gammae present at the junction of lower pinnae  ………………………………………………Asplenium yoshinagae subsp. indicum

28b. Gammae absent ……………………………………………………………………………….. Asplenium yoshinagae subsp. yoshinagae

29a.  Lamina variously hairy with glandular, acicular and septate hairs, sporangium and indusium also hairy ……………………….30

29b. Lamina glabrous (except Tectaria), sporangium and indusium not hairy …………………………………………… ……………….32

30a Plants large up to 1.5 m tall, rhizome thick horizontal, lower 8-16 or more pairs of pinnae gradually reduced into triangular to narrow auricled, veins free basal veins reaches to the sinus ………………………………………………………..Thelypteris esquirolii

30b.  Plants small to medium up to 80 cm tall, rhizome thin creeping or ascending, lower 1-3 pairs of pinnae gradually reduced but not triangular auricled, lower 1-2 pairs of veins anastomosing and forms excurrent vein in sinus  ……………………………………….31

31a. Lower 2½ pairs of veins anastomosing  ……………………………………………………………………………… Thelypteris hirtisora

31b. Only one pair of veins anastomosing, usually the second pair meet the margin shortly above the sinus ……Thelypteris hispidula

32a. Stipe soft, succulent, sori oblong, horse shoe or J-shaped ………………………………………………………………………………33

32a. Stipe hard, sori globose or round reniform  …………………………………………………………………………………………………34

33a. A  thick tuft of narrow golden-brown scales are present at stipe-base; upper surface without setae, sori small roundish or cystopteroid …………………………………………………………………………………………………………… Athyrium woodsioides

33a.  Tuft of thick, narrow golden-brown scales absent at stipe-base; upper surface setaceous, sori oblong or curved……………… ………………………………………………………………………………………………………………………………….. Athyrium setiferum

34a. Pinnae large simple wide, veins reticulate …………………………………………………………………………….Tectaria polymorpha

34b. Pinnae further pinnate, narrow, veins free ………………………………………………………………………………………………….35

35a. Segment apex round obtuse, sori globose, pedicillate, indusium completely covering the sorus and ruptures on maturity……… ………………………………………………………………………………………………………………………………….Peranema aspidioides

35b. Segment apex awned, sori reniform, without any stalk, indusium renifrom opens from side on maturity  ……………………….36

36a. Lamina once pinnate, up to 30 cm long, complete fertile, rachis with a subterminal rooting bud …………….Polystichum lentum

36b. Lamina bi-pinnate, up to 120 cm long, only, sori restricted on the lower half of lamina, upper half of plant always sterile rachis without a subterminal rooting bud ………………………………………………………………………………………Polystichum semifertile

ENUMERATION

LYCOPODIACEAE

Huperzia pulcherrima (Wall. ex Hook. & Grev.) T. Sen & U. Sen

Distribution: Arunachal Pradesh, Meghalaya (Bir et al., 1989), Manipur, Sikkim (Rawat et al., 2014).

Specimens examined: TWLS, terrestrial, 06.12.2012, S.K.Singh & party, 126038, 126057.

Lycopodiella cernua (L.) Pic. Serm.

Distribution: Arunachal Pradesh (Singh & Panigrahi, 2005), Assam (Borthakur et al., 2001), Manipur (Malick & Safui, 1987), Meghalaya (Baishya & Rao, 1982), Mizoram (Fischer, 1938; Benniamin, 2012; Verma et al., 2013; Sharma et al., 2014), Nagaland (Ghosh et al., 2004), Sikkim (Mehra & Bir, 1964; Kholia, 2010), Tripura (Deb, 1981).

Specimen examined: TWLS, lithophytic, 06.12.2012, S.K.Singh & party 126047.

SELAGINELLACEAE

Selaginella involvens (Sw.) Spring

Distribution: Arunachal Pradesh (Singh & Panigrahi 2005), Meghalaya (Baishya & Rao 1982), Manipur, Sikkim (Alston, 1945), Mizoram (Gage, 1901; Benniamin, 2012; Barbhuiya & Singh, 2014).

Specimen examined: TWLS, terrestrial, 06.12.2012, S.K.Singh & party 126026, 126055.

Selaginella vaginata Spring

Distribution: Arunachal Pradesh (Singh & Panigrahi, 2005), Assam (Bir et al., 1989), Mizoram (Sharma et al., 2014), Assam, Manipur, Meghalaya (Bir et al., 1989) Nagaland, Sikkim (Ghosh et al., 2004).

Specimen examined: TWLS, terrestrial, 06.12.2012, S.K.Singh & party 126054.

POLYPODIACEAE

Lepisorus scolopendrium (Ching) Mehra & Bir [Lepisorus excavatus var. scolopendrium (Buch.-Ham. ex D. Don) Ching

Distribution: Arunachal Pradesh (Singh & Panigrahi, 2005 as Pleopeltis leiopteris), Assam, Manipur, Nagaland, Sikkim (Ghosh et al., 2004 as Lepisorus leiopteris), Mizoram (Deb & Dutta, 1987 as Lepisorus excavatus).

Specimen examined: TWLS, epiphytic, 06.12.2012, S.K.Singh & party126045.

Lepisorus sublinearis (Baker ex Takeda) Ching

Distribution: Arunachal Pradesh (?), Assam (Bir et al., 1989), Mizoram (Benniamin, 2012), Manipur, Nagaland, Sikkim (Ghosh et al., 2004).

Specimens examined: TWLS, epiphytic or lithophytic, 06.12.2012 S.K.Singh & party 126021, 126036.

Leptochilus ellipticus (Thunb.) Noot.

Distribution: Meghalaya, Manipur, Nagaland (Bir et al., 1989 as Colysis elliptica), Mizoram (Benniamin, 2012).

Specimen examined: TWLS, terrestrial, 06.12.2012, S.K.Singh & party 126017.

Polypodiodes amoena (Wall. ex Mett.) Ching

Distribution: Arunachal Pradesh (Singh & Panigrahi, 2005 as Goniophlebium amoenum), Mizoram (Deb & Dutta, 1987 as Polypodium amoenum), Manipur, Meghalaya, Sikkim (Ghosh et al., 2004).

Specimen examined: TWLS, lithophytic, 06.12.2012, S.K.Singh & party 126056.

Pyrrosia flocculosa (D. Don) Ching

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

Specimens examined: TWLS, epiphytic, 06.12.2012, S.K.Singh & party 126015, 126053.

Tricholepidium normale (D. Don) Ching

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

Specimen examined: TWLS, epiphytic, 06.12.2012, S.K.Singh & party 126020.

HYMENOPHYLLACEAE

Hymenophyllum denticulatum Sw.

Distribution: Arunachal Pradesh, Meghalaya (Singh & Panigrahi, 2005), Assam, Manipur, Nagaland, Mizoram (Chandra et al., 2008).

Specimens examined: TWLS, epiphytic or lithophytic, 06.12.2012, S.K.Singh & party 126024, 126052.

DENNSTAEDTIACEAE

Microlepia firma Mett. ex Kuhn

Distribution: Sikkim, Meghalaya (Ghosh et al., 2004), Mizoram*.

Specimen examined: TWLS, terrestrial, 06.12.2012, S.K.Singh & party 126049.

Microlepia hancei Prantl

Distribution: Meghalaya (Dixit, 1984), Mizoram (Verma et al., 2014), Nagaland (Jamir &Rao, 1988), Sikkim (Mehra & Bir, 1964).

Specimen examined: TWLS, terrestrial, 06.12.2012, S.K.Singh & party 126048.

Microlepia strigosa (Thunb.) C. Presl

Distribution: Meghalaya, Mizoram, Tripura (Kachroo et al., 1989; Fischer, 1938; Benniamin, 2012).

Specimen examined: TWLS, terrestrial, 06.12.2012, S.K.Singh & party 126041, 126043.

Pteridium revolutum (Blume) Nakai

Distribution: Arunachal Pradesh (Benniamin, 2010), Manipur (Shukla & Baishya, 1980 as Pteridium aquilinum (L.) Kuhn), Mizoram (Fischer, 1938; Benniamin, 2012; Barbhuiya & Singh, 2014), Nagaland (Jamir & Rao, 1988 as P. aquilinum), Meghalaya (Baishya & Rao, 1982 as P. aquilinum).

Specimen examined: TWLS, terrestrial, 06.12.2012, S.K.Singh & party 126019.

LINDSAEACEAE

Lindsaea odorata Roxb.

Distribution: Arunachal Pradesh (Singh & Panigrahi 2005), Assam, Meghalaya (Kachroo et al., 1989), Mizoram*.

Specimen examined: TWLS, terrestrial, 06.12.2012, S.K.Singh & party 126029.

Odontosoria chinensis (L.) J. Sm.

Distribution: Arunachal Pradesh (Singh & Panigrahi, 2005), Assam (Borthakur et al., 2001), Meghalaya (Baishya &Rao, 1982), Mizoram (Deb & Dutta, 1987; Benniamin, 2012; Verma et al., 2014), Nagaland (Jamir & Rao, 1988), Sikkim (Kholia, 2010), Tripura (Deb, 1981).

Specimen examined: TWLS, terrestrial, 06.12.2012, S.K.Singh & party 126037.

PTERIDACEAE

Aleuritopteris subdimorpha (C.B. Clarke & Baker) Fraser-Jenk.

Distribution: Arunachal Pradesh, Meghalaya (Herb.), Mizoram*.

Specimen examined: TWLS, terrestrial, 06.12.2012, S.K.Singh & party 126028.

Coniogramme serrulata Fee

Distribution: Manipur (Ghosh et al., 2004), Mizoram*.

Specimen examined: TWLS, terrestrial, 06.12.2012, S.K.Singh & party 126042.

Pteris arisanensis Tagawa

Distribution: Assam (Kachroo et al., 1989 sub. P. linearis Poir. & P. confusa T.G. Walker), Arunachal Pradesh (Singh & Panigrahi, 2005 sub. P. linearis Poir.), Manipur, Meghalaya, Mizoram, Nagaland, Tripura, Sikkim (Ghosh et al., 2004 sub. P. linearis Poir.).

Specimen examined: TWLS, terrestrial, 06.12.2012, S.K.Singh & party 126027; 06.12.2012, S.K.Singh & party 126058

Pteris aspericaulis Wall. ex J. Agardh

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

Specimen examined: TWLS, terrestrial, 06.12.2012, S.K.Singh & party 126032, 126051.

Pteris biaurita L.

Distribution: Arunachal Pradesh (Singh &Panigrahi, 2005), Assam (Borthakur et al., 2001), Manipur (Ghosh et al., 2004), Meghalaya (Baishya & Rao, 1982), Mizoram (Gage, 1901; Verma et al., 2014), Nagaland (Jamir & Rao, 1988), Sikkim (Mehra & Bir, 1964), Tripura (Kachroo et al., 1989).

Specimen examined: TWLS, terrestrial, 06.12.2012, S.K.Singh & party 126050.

Pteris subindivisa C.B. Clarke

Distribution: Assam (Borthakur et al., 2001), Arunachal Pradesh Sikkim (Ghosh et al., 2004), Meghalaya (Kachroo et al., 1989), Mizoram*.

Specimen examined: TWLS, terrestrial, 06.12.2012, S.K.Singh& party 126031.

Pteris tricolor Linden

Distribution: Manipur, Tripura, Mizoram (Ghosh et al., 2004; Fraser-Jenkins, 2012).

Specimen examined: TWLS, terrestrial, 06.12.2012, S.K.Singh & party 126035.

ADIANTACEAE

Adiantum philippense L.

Distribution: Arunachal Pradesh (Singh & Panigrahi, 2005), Assam (Borthakur et al., 2001), Meghalaya (Baishya & Rao, 1982), Mizoram (Fischer, 1938; Benniamin, 2012; Verma et al., 2013; Barbhuiya & Singh, 2014), Nagaland (Jamir & Rao, 1988), Sikkim (Kholia, 2010), Tripura (Deb, 1981).

Specimen examined: TWLS, terrestrial, 06.12.2012, S.K.Singh & party 126023.

ASPLENIACEAE

Asplenium yoshinagae Makino subsp. yoshinagae

Distribution: Meghalaya (Herb.), Mizoram*.

Specimen examined: TWLS, terrestrial, 06.12.2012, S.K.Singh & party 126046

Asplenium yoshinagae subsp. indicum (Sledge) Fras.-Jenk

Distribution: Arunachal Pradesh, Assam, Meghalaya, Manipur, Nagaland (Vasudeva et al., 1990 as A. yoshinagae var. planicaule), Mizoram*.

Specimen examined: TWLS, terrestrial, 06.12.2012, S.K.Singh & party 126033.

THELYPTERIDACEAE

Thelypteris esquirolii (Christ) Ching

Distribution: Assam, Arunachal Pradesh, Meghalaya, Sikkim (Herb.) Mizoram*.

Specimen examined: TWLS, terrestrial, 06.12.2012, S.K.Singh & party 126018.

Thelypteris hispidula (Decne.) C.F. Reed

Distribution: Assam, Arunachal Pradesh (Singh & Panigrahi, 2005 as Cyclosorus hispidulus) Meghalaya, Tripura (Kachroo et al., 1989 as Cyclosorus hispidulus), Mizoram*.

Specimen examined: TWLS, terrestrial, 06.12.2012 S.K.Singh & party 126030.

Thelypteris hirtisora (C. Chr.) K. Iwats.

Distribution: Mizoram (Holttum, 1979; Barbhuiya & Singh, 2014, Verma et al., 2014), Nagaland (Holttum, 1979).

Specimen examined: TWLS, terrestrial, 06.12.2012, S.K.Singh & party 126034.

WOODSIACEAE

Athyrium setiferum C. Chr.

Distribution: Meghalaya (herb.), Mizoram*.

Specimen examined: TWLS, terrestrial, 06.12.2012, S.K.Singh & party 126016.

Athyrium woodsioides Christ

Distribution: Assam, Meghalaya, Mizoram*.

Specimens examined: TWLS, terrestrial, 06.12.2012, S.K.Singh & party 126040, 126044.

DRYOPTERIDACEAE

Peranema aspidioides (Blume) Mett.

Distribution: Meghalaya, Nagaland (Jamir & Rao, 1988 as Diacalpe aspidioides), Mizoram (Benniamin, 2012).

Specimen examined: TWLS, terrestrial, 06.12.2012, S.K.Singh & party126039.

Polystichum lentum (D. Don) T. Moore

Distribution: Arunachal Pradesh (Singh &Panigrahi, 2005), Assam (Borthakur et al., 2001), Manipur (Malick & Safui, 1987), Meghalaya (Baishya & Rao, 1982), Mizoram (Fischer, 1938; Chandra & Chandra, 1983; Benniamin, 2012; Verma et al., 2014), Nagaland (Jamir & Rao, 1988), Sikkim (Kholia, 2010), Tripura (Deb, 1981).

Specimen examined: TWL, lithophytic, 06.12.2012, S.K.Singh & party 126014.

Polystichum semifertile (C.B. Clarke) Ching

Distribution: Meghalaya, Nagaland, Sikkim (Jamir & Rao, 1988), Mizoram (Benniamin, 2012).

Specimen examined: TWLS, Terrestrial, 06.12.2012, S.K.Singh & party 126013

Tectaria polymorpha (Wall. ex Hook.) Copel.

Distribution: Arunachal Pradesh (Singh &Panigrahi, 2005), Assam (Borthakur et al., 2001), Manipur (Malick & Safui, 1987), Meghalaya (Baishya & Rao, 1982), Mizoram (Fischer, 1938; Benniamin, 2012; Verma et al., 2013; Verma et al., 2014; Barbhuiya & Singh, 2014; Sharma et al., 2014), Nagaland (Jamir & Rao, 1988), Sikkim (Kholia, 2010), Tripura (Deb, 1981).

Specimen examined: TWLS, terrestrial, 06.12.2012, S.K.Singh& party 126025.

LOMARIOPSIDACEAE

Bolbitis sinensis K.Iwats.

Distribution: Arunachal Pradesh (Singh & Panigrahi, 2005), Assam (Nath & Bhattacharaya, 2002), Meghalaya (Baishya & Rao, 1982 as Bolbitis bipinnatifida), Mizoram (Deb & Dutta, 1987; Benniamin, 2012; Barbhuiya & Singh, 2014), Nagaland (Jamir & Rao, 1988 as Bolbitis bipinnatifida), Tripura (Deb, 1981 as Egenolfia bipinnatifida).

Specimen examined: TWLS, terrestrial, 06.12.2012, S.K.Singh & party 126022.

Acknowledgements

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

References

Alston, A.H.G. 1945. An enumeration of the Indian species of Selaginella. Proceedings of the National Institute of Sciences of India 11: 211–235.

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