2 A.E.D. Daniels mountains including <strong>the</strong> Nilgiris and <strong>the</strong> Palnis, where many peaks exceed 2000 m elevation and <strong>the</strong> highest, Dodabetta Peak, rises to 2637 m. Similarly, <strong>the</strong> rainfall ranges from 640 mm along <strong>the</strong> eastern region to 3000 mm along <strong>the</strong> western and southwestern regions <strong>of</strong> <strong>the</strong> state as <strong>the</strong>se two regions receive both <strong>the</strong> north-east and south-west monsoon rains (Annamalai, 2004). <strong>Tamil</strong> <strong>Nadu</strong> has a forest cover <strong>of</strong> 21,482 km 2 (Annamalai, 2004). This is mostly confined to <strong>the</strong> Western and <strong>the</strong> Eastern Ghats. As <strong>the</strong> terrain varies from sea level to over 2600 m., <strong>the</strong> vegetation types also vary accordingly, from scrub jungles in <strong>the</strong> foothills, to hill-top wet evergreen forests above 2000 m. The forest types seen along <strong>the</strong> Western Ghats <strong>of</strong> <strong>the</strong> state include scrub jungles, dry deciduous forests, moist deciduous forests, semi-evergreen forests, moist evergreen forests and hill-top wet evergreen forests with grassy swards. However, grassy swards are <strong>of</strong>ten met with in dry deciduous forests. The forests <strong>of</strong> <strong>the</strong> Eastern Ghats are mostly scrub to dry deciduous. Along ISSN 0945-3466
ARCHIVE FOR BRYOLOGY 65 (2010) <strong>Checklist</strong> <strong>of</strong> <strong>the</strong> <strong>bryophytes</strong> <strong>of</strong> <strong>Tamil</strong> <strong>Nadu</strong>, <strong>India</strong> <strong>the</strong> East Coast <strong>the</strong>re is a large tract <strong>of</strong> mangrove forests. Unfortunately, <strong>the</strong> forests in <strong>Tamil</strong> <strong>Nadu</strong> are now fragmented, particularly those along <strong>the</strong> hill tracts due to <strong>the</strong> introduction <strong>of</strong> various plantation crops such as c<strong>of</strong>fee, tea and pine by <strong>the</strong> British as early as <strong>the</strong> beginning <strong>of</strong> <strong>the</strong> 19th century. Plantations <strong>of</strong> Eucalyptus, Acacia, teak, rubber, Albizia and clove were also introduced by <strong>the</strong> State Forest Department till <strong>the</strong> late 20th century. On <strong>the</strong> o<strong>the</strong>r hand, private estates have contributed considerably to <strong>the</strong> destruction <strong>of</strong> <strong>the</strong> rich forests <strong>of</strong> <strong>the</strong> Western Ghats. Added to <strong>the</strong>se, holiday resorts, educational institutions, factories/industries, etc. have largely contributed to <strong>the</strong> annihilation <strong>of</strong> <strong>the</strong>se forests in a number <strong>of</strong> areas making <strong>the</strong>m fragmentary. Thus, <strong>the</strong> forests in <strong>Tamil</strong> <strong>Nadu</strong> have suffered destruction for over a century. This has led to a great loss <strong>of</strong> biodiversity, particularly <strong>the</strong> lower groups <strong>of</strong> organisms, due to loss <strong>of</strong> habitats and an increasing environmental pollution, and <strong>bryophytes</strong> are no exception. Consequently, <strong>the</strong> majority <strong>of</strong> <strong>bryophytes</strong> have become threatened in <strong>Tamil</strong> <strong>Nadu</strong> (personal observation). As no Conservation Assessment Management Plan (CAMP) has been done for any group <strong>of</strong> <strong>bryophytes</strong> in <strong>India</strong>, <strong>the</strong> exact status <strong>of</strong> <strong>the</strong>se plants is still not known. Hence, a bryophyte checklist for <strong>Tamil</strong> <strong>Nadu</strong> can act as baseline information for <strong>the</strong> conservation <strong>of</strong> this group, for bryologists and o<strong>the</strong>rs interested in <strong>bryophytes</strong>. History <strong>of</strong> bryophyte recording in <strong>Tamil</strong> <strong>Nadu</strong> The present knowledge on <strong>the</strong> <strong>bryophytes</strong> <strong>of</strong> <strong>Tamil</strong> <strong>Nadu</strong> began with studies by European bryologists during <strong>the</strong> 19th century. Montagne (1842a) reported 66 species <strong>of</strong> mosses from <strong>the</strong> Nilgiri Hills (<strong>Tamil</strong> <strong>Nadu</strong>) in Cryptogamae Nilgherienses, and Müller (1853) reported 56 species <strong>of</strong> mosses from <strong>the</strong> Nilgiris in Musci Neilgherrensis. Mitten (1859) reported over 700 species in his Musci <strong>India</strong>e Orientalis, <strong>of</strong> which 145 were from <strong>Tamil</strong> <strong>Nadu</strong>, and Dixon (1914) reported 35 species from <strong>the</strong> state. From <strong>the</strong> Western Ghats <strong>of</strong> Madurai (<strong>Tamil</strong> <strong>Nadu</strong>), Potier de la Varde (1922–1924) reported 48 species in his Musci Madurensis, 49 species in Nouvelles herborisations dans le sud de l’Inde (1925) and 7 species in Musci novi Indici (1928). Dixon and Potier de la Varde reported 80 species from <strong>India</strong> in <strong>the</strong>ir Contribution à la flore bryologique de l’Inde meridionale (1927), and 56 species from <strong>Tamil</strong> <strong>Nadu</strong> in Nouvelle contribution à la flore bryologique de l’Inde (1930). Foreau (1961, 1964) listed 368 species <strong>of</strong> mosses from <strong>the</strong> Palni hills (W. Ghats <strong>of</strong> Madurai) which included 95 new species and 15 new varieties. Gangulee’s invaluable Mosses <strong>of</strong> eastern <strong>India</strong> and adjacent regions (1969–1980) provides some information on <strong>the</strong> habitats and distribution <strong>of</strong> south <strong>India</strong>n mosses and occasionally mentions occurrences in <strong>Tamil</strong> <strong>Nadu</strong>, though site names and collections data are usually lacking. Wadhwa (1969, 1971) provided a partial species checklist with references to moss records from peninsula <strong>India</strong>, including <strong>the</strong> Western Ghats and Nilgiris. More recent works include Mat<strong>the</strong>w (1973) and Mohamed (1981, 1982, 1984) on Rhodobryum commersonii (Schwägr.) Paris and R. aubertii (Schwägr.) Thér. in South <strong>India</strong>, on Bryum wightii Mitt. and related species, and a synopsis <strong>of</strong> <strong>the</strong> genus Rhodobryum in Asia respectively. Ochi (1985) published an annotated list <strong>of</strong> mosses <strong>of</strong> <strong>the</strong> subfamily Bryoideae in South, Sou<strong>the</strong>ast and East Asia, Ellis (1989) made a revision on <strong>the</strong> genus Calymperes in sou<strong>the</strong>rn <strong>India</strong> and neighbouring islands. Lal (2005) published a checklist <strong>of</strong> <strong>India</strong>n mosses but did not specifically mention reports from <strong>Tamil</strong> <strong>Nadu</strong>, but ra<strong>the</strong>r collectively as 'South <strong>India</strong>': <strong>the</strong>se records are not cited in this checklist. Similarly, <strong>the</strong> present knowledge <strong>of</strong> <strong>the</strong> liverworts and hornworts <strong>of</strong> <strong>Tamil</strong> <strong>Nadu</strong> began with Montagne (1842b), who reported 34 species <strong>of</strong> liverworts from <strong>the</strong> Nilgiri Hills (<strong>Tamil</strong> <strong>Nadu</strong>) in Cryptogamae Nilgherienses. Subsequently, Mitten (1861) reported 26 species from <strong>Tamil</strong> <strong>Nadu</strong> in Hepaticae <strong>India</strong>e Orientalis. The works <strong>of</strong> Stephani (1900–1924), Benedix (1953), Chopra (1938), Udar (1976), Udar and Srivastava (1975, 1977), Asthana and Srivastava (1991), Asthana et al. (1995), Nath and Asthana (1998), Parihar et al., (1994), Singh (1994, 2002) and Srivastava and Srivastava (2002), and many o<strong>the</strong>rs, contain records <strong>of</strong> collections from <strong>India</strong>, among which are records from <strong>Tamil</strong> <strong>Nadu</strong>. 3