L. Singh1, B.S. Kholia2*, B. Kumar2, P. Joshi2, S. Sharma2 & A. Ebihara3
1Botanical Survey of India, Andaman and Nicobar Regional Center, Port Blair, Andaman & Nicobar, India
2Botanical Survey of India, Northern Regional Center, Dehradun, Uttarakhand, India
3Department of Botany, The National Science Museum, 4-1-1 Amakubo, Tsukuba 305-0005, Japan.
*Corresponding author:B.S. Kholia; email:firstname.lastname@example.org
Trichomanes bipunctatum Poir. and T. minutum Blume are reported here as new record for Andaman and Nicobar Islands. Occurrence of T. motleyi (Bosch) Bosch is confirmed in Andaman, initially reported by Beddome in 1883 but without citing any collection. Present collection of T. motleyi from Andaman after more than 130 years is significant.
Keywords Trichomanes, Andaman Islands, New record.
Hymenophyllaceae (filmy fern family) is one of the largest families of ferns and comprises about 600 species (Iwatsuki, 1990), generally grows at humid and shady conditions on mossy substrata as lithophytes or epiphyte. Almost all the members of this family are with one cell thick lamina and marginal tubular or cup-shaped sunken sori in which sporangia arises on a receptacle and covered by bivalvate or tubular involucres hence can be distinguished from other ferns. The family is well studied by various renowned Pteridologists (van den Bosch 1858, 1861a,b; Prantl, 1875; Copeland, 1933, 1937, 1938, 1941; Morton, 1942, 1968; Pichi-Sermolli, 1977; Iwatsuki, 1984, 1985, 1990; Ebihara et al., 2006) but till date there is no general consensus about the number of genera within the family. Traditionally, the filmy ferns are grouped in to two genera (Trichomanes J.E. Smith and Hymenophyllum L.) and this bigeneric system is accepted by most of the taxonomists (Moore, 1857; Mettenius, 1864; Presl, 1836, 1843; Hooker, 1846; Hooker & Baker, 1865-68; Smith, 1875; Beddome, 1883; Clarke, 1880; Fraser-Jenkins, 2009) and also accepted in present communication.
Andaman and Nicobar Islands constitute an ideal habitat and niches for ferns in general and filmy ferns in particular. They are poorly understood in India in general and Andaman and Nicobar islands in particular, hence a detailed study of Indian filmy ferns is urgently required. At present about forty species of filmy ferns are reported from India, out of them 29 species are Trichomanes s.l. (Fraser-Jenkins 2008, 2009). Initially, only two species of Trichomanes (Trichomanes molteyi and T. kurzii Bedd.) were reported by Beddome (1883) from Andaman and Nicobar Islands. Later, Dixit and Sinha (2001) reported six species of Trichomanes s.l. from these islands. However, Fraser-Jenkins (2008) accepted the occurrence of four Trichomanes from Andaman and Nicobar.
During the recent survey, present authors collected three species of Trichomanes from these Islands which are taxonomically and phytogeographically interesting for India. Among them two are new record for these islands and third species collected after more than a century. Hence a brief note is presented here along with detail images to facilitate their identification.
Taxonomy and Distribution note
Trichomanes bipunctatum Poir., Encycl. (Lamarck) 8(1): 69. 1808; Clarke, Trans. Linn. Soc. Lond. II. Bot. 429. 1880 (p.p.); Beddome, Handb. Ferns Brit. India 41.1883 (p. p.).
Crepidomanes bipunctatum (Poir.) Copel., Philipp. J. Sci. 67(1): 59. 1938. Didymoglossum bipunctatum (Poir.) E. Fourn., Ann. Sci. Nat., Bot., sér. 5, 18: 263. 1873. Hymenophyllum alatum Schkuhr, Krypt. Gew. 1: 133, t. 135b. 1809, non Sw. (1801).Hymenophyllum filicula Bory ex Willd., Sp. Plant. [Linnaeus], ed. 4, 5(1): 528. 1810. Trichomanes filicula (Bory ex Willd.) Bory, in Duperrey, Voy. Monde, Crypt. 6: 283. 1829. Taschneria filicula (Bory) C. Presl, Epim. Bot. 258. 1851. Didymoglossum griffithii Bosch, Ned. Kruid. Arch. 5(3): 141. 1863. Trichomanes griffithii (Bosch) Panigrahi, Phytologia 31(3): 256. 1975. Crepidomanes griffithii (Bosch) R.D. Dixit & B. Ghosh, in Dixit, Census Ind. Pterid.: 91. 1984. Crepidomanes dilatatum Ching & Chu H. Wang, Act. Phytotax. Sin. 8: 163, t. 19. 1959.
Plants small, 4 – 10 cm long, once pinnate and pinnatifid or lobed, stipe and rachis winged and minute hairy, hairs short and dense at lower portion and become smaller club-shaped and sparser upwards; lateral pinnae fan-shaped and lobed, margins entire, apex round, sori marginal, sunk, tubular or pouch shaped, indusium bilipped, broad and dilated at base only, apex shortly triangular, receptacle somewhat exserted, lobes with long sub-marginal continuous false veins, oblique or internal false veins absent (Figure 1).
Specimen examined: India, Little Andaman, Krishna Nalah water fall, 25 masl., 04 April 2012, Lalji Singh 29517, (PBL & BSD).
Distribution: India (Andaman & Nicobar –present report, Andhra Pradesh, Arunachal Pradesh, Karnataka, Kerala, Manipur, Meghalaya, Mizoram, Nagaland, Sikkim, Tamil Nadu, West Bengal); S. E. Asia & E Asia, Africa, Australia and Pacific Islands.
Notes: During British period, this species was poorly understood and studied in broader sense as an assemblage of many species like Trichomanes campanulatum Roxb., Trichomanes latealatum (Bosch) C. B. Clarke, Trichomanes insigne (Bosch) Bedd. etc. and were reported only from mainland India (Clarke 1880, Beddome1883). Dixit (1984) listed Crepidomanes griffithii (Bosch) R.D. Dixit & B. Ghosh (a synonym of T. bipunctatum) from Andaman which subsequently followed by Chandra (2000). But
the report of Dixit (1984) was an error, the specimens of Crepidomanes griffithii (=T. bipunctatum) was not found during the compiling of Pteridophytic flora of Andaman and Nicobar islands, hence it was not reported by Dixit & Sinha (2001). Further, they (Dixit & Sinha, 2001) erroneously treated Trichomanes bipunctatum as a synonym of T. latealatum. Hence, there is no authentic report of T. bipunctatum from Andaman and Nicobar islands is taxonomically interesting which is reported here as a new record to Indian islands.
Trichomanes minutum Blume, Enum. Plant. Javae 2: 223. 1828.
Gonocormus minutus (Blume) Bosch, Verh. Kon. Akad. Wetensch. Amsterdam 9(6): 7-8, t. 3. 1861.Crepidomanes minutum (Blume) K. Iwats., J. Fac. Sci. Univ. Tokyo, Sect. 3, Bot. 13(5): 524. 1985. Trichomanes proliferum forma minutum (Blume) Manickam & Irud., Pterid. Fl. W. Ghats S. India 151-152. 1992, comb. inval. Trichomanes proliferum var. minutum (Blume) C. A. Hameed, Filmy Ferns S. India 106. 2003, comb. inval. (misplaced). Trichomanes proliferum Blume, Enum. Pl. Javae 2: 224. 1828. Gonocormus prolifer (Blume) Prantl, Unters. Morph. Geffässkrypt. 1. Hymenoph. 51. 1875. Crepidomanes proliferum (Blume) Bostock, in Bostock & Spokes, Hymenophyllaceae, in Orchard & McCarthy, Fl. Australia 48: 706. 1998. Trichomanes diffusum Blume, Enum. Pl. Javae 2: 225. 1828. Gonocormus diffusus (Blume) Bosch, Verh. Kon. Akad. Wetensch. Amsterdam 9(6): 9. 1861. Trichomanes bifolium Blume, Enum. Plant. Javae 2: 224. Trichomanes palmatum C. Presl, Abhand. Kon. Böhm. Ges. Wiss., 5, 3: 16, 39. 1843. Trichomanes subpinnatifidum Bosch, Ned. Kruid. Arch. 5(2): 141. 1861. Trichomanes teysmannii Bosch, Ned. Kruid. Arch. 5(2): 142. 1861. Gonocormus teysmannii (Bosch) Bosch, Verh. Kon. Akad. Wetensch. Amsterdam 9(6): 19, t. 5. 1861. Trichomanes boninicola Nakai, Bot. Mag. Tokyo 40: 262. 1926. Gonocormus boninicola (Nakai) Tagawa, J. Jap. Bot. 26: 186. 1951. Trichomanes orbiculatum Ching ex Ogata, J. Jap. Bot. 15: 694. 1938. Gonocormus siamensis Tagawa & K. Iwats., Act. Phytotax. Geobot. 22: 99, t. 3. 1967. Trichomanes saxifragoides C. Presl, Abhandl. Kon. Böhm. Ges. Wiss., 5, 3: 39. 1843. Gonocormus saxifragoides (C. Presl) Bosch, Verh. Kon. Akad. Wetensch. Amsterdam 9(6): 9. 1861. Trichomanes parvulum sensu Blume, Enum. Plant. Javae 2: 223. 1828, non Poir. 1808.
Plants small (2 – 4 cm long) with 1 – 2 cm long wiry stipe; lamina circular or round, flabellately dissected to half way from edge and forming narrow irregular segments; veins dichotomous, without false veins; sori sunken at margins, tubular, indusial margins dilated. (Figure 2)
Specimen examined: India, Little Andaman, Krishna Nalah water fall, 25 masl., 04 April 2012, Lalji Singh 29516, (PBL & BSD). .
Distribution: India (Andaman & Nicobar –present report, Karnataka, Kerala, Tamil Nadu); China, Indonesia, Malaysia, Philippines, Sri Lanka, Taiwan, Thailand, Vietnam, Australia, New Guinea; Pacific Islands.
Notes: Following Blume (1828), Beddome (1865-70, 1883) reported T. parvulum Poir. from Nilghiris, later Trichomanes saxifragoides C. Presl is also reported from various parts of India. Many taxonomists treated both species as synonyms. In recent years many species of Blume were sunk in T. minutum (Iwatsuki 1985, 1988; Liu et al., 2013) including Trichomanes proliferum Blume and Trichomanes saxifragoides. This treatment is also accepted here but detail revisionary study of this cryptic complex is needed. However, some Pteridologists have now initiated studies on such complexes of filmy ferns (Nitta et al., 2011). Beddome (1883) had misapplied the name ‘T. parvulum’ for a S. E. Asian species but true “parvulum” is from Africa and is Hymenophyllum (now synomized under H. sibthorpidoides) not Trichomanes.
On reviewing the Indian fern literature (Beddome, 1883, 1892; Clarke, 1880; Dixit, 1984; Dixit & Sinha, 2001; Chandra, 2000; Fraser-Jenkins, 2008) T. minutum (including its synonyms Trichomanes saxifragoides, Trichomanes proliferum or Trichomanes parvulum) is so far not reported from Andaman and Nicobar islands, hence it is reported here as a new record for Indian islands.
Trichomanes motleyi (Bosch) Bosch, Ned. Kruidk. Arch. 5(2): 145. 1861; Beddome, Handb, Ferns Brit, India 36. 1883.
Microgonium motleyi Bosch, Verhandl. Kon. Akad. Wetensch Amsterdam 9(6): 5, t. 1. 1861. Didymoglossum motleyi (Bosch) Ebihara & K. Iwats., Blumea 51(2): 236. 2006. Trichomanes beccarianum Ces., Atti Acad. Napoli 7(8): 8, t. 1, f. 2. 1876. Microgonium beccarianum (Ces.) Copel., Philipp. J. Sci. 67: 63. 1938. Trichomanes cognatum Ces., Rend. Acad. Napoli 16: 24, 28. 1877, non C. Presl (1843). Trichomanes motleyi var. cognatum (Ces.) C. Chr., Index Fil.: 637. 1906. Trichomanes minutissimum Alderw., Philipp. J. Sci. 11: 102, t. 5, f. 1. 1916.
Plants small hairy (4 – 10 mm) with long creeping rhizome; hairs are longer on rhizome, stipe (if present) and lower portion of veins and become shorter and sparser on upper part of veins. Lamina cordate or orbicular sessile or shortly stalked, margins entire, shortly notched at apical portion in fertile lamina, veins spreading, simple or rarely forked, sori apical on notch, tubular, mouth dilated (Figure 3).
Specimen examined: India, Little Andaman: Krishna Nalah water fall, 25 m., 04 April 2012, Lalji Singh 29518, (PBL & BSD). .
Distribution: India (Andaman & Nicobar), Indonesia, Japan, Malaysia, Myanmar, Sri Lanka, Taiwan, Thailand, Vietnam, Australia, New Guinea, Pacific Islands etc.
Notes: It was reported from Andaman by Beddome (1883) without citing any collection. Based on Beddome (1883) it is also listed from Andaman by Dixit (1984), Chandra (2000) and Fraser-Jenkins (2008). On the other hand, while revising the Hymenophyllaceae of Sri Lanka, Sledge (1968) stated that T. motleyi had not been found in India. Dixit and Sinha (2001) also not reported this species in the Pteridophytic flora of Andaman and Nicobar. Perhaps they could neither collect the specimen from these Islands nor any collection in CAL or PBL. More confusion on its distribution arose when Beddome (1883) treated Trichomanes henzaiense Hook. from Burma (Beddome 1865-70) as synonym of T. motleyi. Following Beddome (1883), subsequent workers like Dixit (1984), Chandra (2000) and Fraser-Jenkins (2008) listed this species from Andaman Islands but till date the specimen upon which Beddome’s report (1883) was based, has not been traced in any herbaria. Moreover, after Indian independence there is no report on its collection from Andaman (Dixit & Sinha, 2001). Hence present report warrants the occurrence of T. motleyi in Andaman and Nicobar islands and correction towards the statement of Sledge (1968) who stated that T. motleyi had not been found in India. Furthermore, present collection is recollection of this minute fern after more than 130 years of its first report from India.
The authors are thankful to Director Botanical Survey of India and Scientist E and Head, BSI Northern Regional Centre, Dehradun for necessary facilities. The authors also thank Mr. C. R. Fraser-Jenkins, Kathmandu, Nepal and Prof. M. Kato, Tokyo Japan for the help in identification and literature.
Beddome, R.H. 1865-1870. The Ferns of British India etc.: t. 1-345. Gantz Bros, Madras. [Reprinted 1973. Pama Primlane, The Chronica Botanica, New Delhi. 1976. Oxford and IBH Publication Co., New Delhi].
Beddome, R.H. 1883. Handbook to the Ferns of British India, Ceylon and the Malay Peninsula. Thacker Spink & Co., Calcutta. (with supplement 1892).
Blume, C.L. von 1828. Enumeratio Plantarum Javae et Insularum adjacentium 2 Filices: 99-274. Lugduni Batavorum.
Bosch, R. van den 1859. Synopsis Hymenophyllacearum: monographiae hujus ordinis prodromus. Nederl. Kruidk. Arch. 4: 341-419.
Bosch, R. van den 1861a. Hymenophyllaceas novas: cum ab aliis tum a semet ipso distinctas, ceu synopseos supplemntum. Nederl. Kruidk. Arch. 5, 2: 135-185.
Bosch, R. van den 1861b. Hymenophyllaceae javanicae etc., Verh. Koninkl. Akad. Wetensch. Amsterdam 9(6): 1 et seq.
Bosch, R. van den 1861c. Hymenophyllaceaejavanicae; sive descriptio Hymenophyllacearum archipelagi indici, iconibus illustrata . . . Cum tabulis iii. Verh. Koninkl. Akad. Wetensch. Amsterdam 9(6): 1-67, Pl. 1-52.
Chandra, S. 2000. The Ferns of India (Enumeration, Synonyms & Distribution). International Book Distributors, Dehradun.
Clarke, C.B. 1880. A review of the ferns of northern India etc., Transactions of the Linnean Society of London, ser. 2, Bot. 1: 425-619.
Copeland, E. B. 1933. Trichomanes. The Philippine Journal of Science 51: 119-280.
Copeland, E. B. 1937. Hymenophyllum. The Philippine Journal of Science 64: 1-188 + pl.1-89.
Copeland, E. B. 1938. Genera Hymenophyllacearum. The Philippine Journal of Science 67: 1-110 +pl. 1-11.
Copeland, E. B. 1941. Notes on Hymenophyllaceae. The Philippine Journal of Science 73: 457-469.
Dixit 1984. A census of the Indian pteridophytes. Botanical Survey of India, Howrah.
Dixit, R.D. and Sinha, B.K. 2001. Pteridophytes of Andaman and Nicobar Islands. Bishen Singh Mahendra Pal Singh, Dehradun.
Ebihara, A., Dubuisson, J.-Y., Iwatsuki, K., Hennequin, S. and Ito, M. 2006. A taxonomic revision of Hymenophyllaceae, Blumea 51: 221-280.
Fraser-Jenkins, C.R. 2008. Taxonomic Revision of Three Hundred Indian Subcontinental Pteridophytes with a Revised Census List. Bishen Singh Mahendra Pal Singh, Dehradun.
Fraser Jenkins, C. R. 2009. A brief comparison of modern Pteridophyte classifications (Families and genera in India). Indian Fern Journal 26: 107-127.
Hooker, W.J. 1846. Species Filicum etc. vol 1. William Pamplin, 45, Frith Street, Soho Square [London]. [Reprinted 1970. J. Cramer, Lehre].
Hooker, W.J. and Baker, J.G. 1865-1868. Synopsis Filicum, or a synopsis of all known ferns etc.: 1-482. Robert Hardwicke, 192, Piccadilly [London].
Iwatsuki, K. 1984. Studies on the systematics of filmy ferns 7 A scheme of classification based chiefly on the Asiatic species, Acta Phytotaxonomica et Geobotanica 35: 165-179.
Iwatsuki, K. 1985. The Hymenophyllaceae of Asia, excluding Malesia. Tokyo Journal of the Faculty of Science, the University of Tokyo 13: 501-551.
Iwatsuki, K. 1988. An enumeration of the Pteridophytes of Nepal, in Ohba, H. & Malla, S.B. (Eds.), The Himalayan Plants 1: 231-339. University Museum, University of Tokyo, Tokyo.
Iwatsuki, K. 1990. Hymenophyllaceae In K Kubitzki (Ed.) The families and genera of vascular plants Vol I Pteridophytes and Gymnosperms. 157-163 Springer Verlag Berlin.
Liu, J.X., Zhang, Q.Y., Ebihara, A. and Iwatsuki, K. 2013. Hymenophyllaceae. Pp. 93–109 in Z. Y. Wu, P. H. Raven & D. Y. Hong, eds., Flora of China, Vol. 2-3 (Pteridophytes). Beijing: Science Press; St. Louis: Missouri Botanical Garden Press.
Mettenius, G. H. 1864. Ueber die Hymenophyllaceae. Leipzig
Moore, T. 1857. Index Filicum. Pamplin, London
Morton, C. V. 1942. Recent ferns literature. American Fern Journal 32: 29-31.
Morton, C. V. 1968. The genera, subgenera and sections of Hymenophyllaceae. Contributions from the United States National Herbarium 38: 153-201.
Nitta, J. H., Ebihara, A. and Ito, M. 2011. Reticulate evolution in the Crepidomanes minutum species complex (Hymenophyllaceae). American Journal of Botany 98(11): 1782-1800.
PichiSermolli, R.E.G.1977. Tentamen pteridophytorum genera in taxonomicum ordinem redigendi. Webbia 31: 315-512.
Prantl, K.A.E. 1875. Die Hymenophyllaceen, die niedrigste Entwicklungsreihe der Farne Unters Morph Gefasskrypt 1: 1-73 pl 1-6 977.
Presl, C.B. 1836. Tentamen Pteridographiae etc. Pragae
Presl, C.B. 1843. Hymenophyllaceae Haase Prague
Sledge, W.A .1968. The Hymenophyllaceae of Ceylon. The Journal of the Linnean Society, Botany 60(383): 289-308.
Smith, J. 1875. Historia Filicum etc. Macmillan and Co. London.