THAI FOREST BULLETIN

66
THaI FOreST BuLLeTIN (BOTaNY) 37
(Baker) Tagawa to Selliguea hirsuta (Baker) S.Linds.; Microlepia trichoclada Ching
to Microlepia herbacea Ching & C.Chr. ex Tardieu & C.Chr.; Thelypteris angulariloba
Ching to Thelypteris hirsutipes (C.B.Clarke) Ching; and Thelypteris esquirolii (Christ)
Ching to Cyclosorus falcilobus (Hook.) Panigrahi.
Major changes in family delimitations
Table 1 summarises the changes in family delimitation between the Flora of
Thailand accounts and those currently recognised and lists the genera in each of the
families. These changes include losing some familiar families altogether, such as
Parkeriaceae (now in Pteridaceae) and Athyriaceae (now mostly in Woodsiaceae), and
changing the delimitation of others quite radically, such as Polypodiaceae (which now
includes Grammitidaceae) and Dryopteridaceae (which has lost Tectaria and its relatives
and gained genera from Lomariopsidaceae, Davalliaceae and Athyriaceae). Pteridaceae
has also undergone major changes and is now much larger with five subfamilies which do
not correspond well to former families; e.g. Pteridaceae subfamily Pteridoideae includes
only Pteris from the previously delimited Pteridaceae, with all of the other genera
previously having been placed in Parkeriaceae.
Major changes in generic delimitation
Table 2 lists all the currently used names for Thai ferns and compares them to
Pteridophytes in Thailand (Boonkerd & Pollawatn, 2000) and Flora of Thailand (Tagawa
& Iwatsuki, 1979, 1985, 1988, 1989). A total of 191 taxa have a name which is now
different to the name used in the Flora of Thailand accounts, most of these as a result
of changes in generic delimitation. Changes in generic delimitation are particularly
extensive in Davalliaceae, Hymenophyllaceae, Polypodiaceae and Thelypteridaceae.
Well known genera such as Grammitis, Polypodium, Trichomanes and Vittaria are no
longer recognised in Thailand. Table 2 also provides references to the literature on new
taxa, new records and in cases where the taxon epithet is different to that used in the Flora
of Thailand account (usually due to synonymy). If there is no reference given then the
change is made here. Black dots are used to indicate a taxon which is under a different
name to that used in the original Flora of Thailand account; circles are used to indicate a
taxon which is new to Thailand, either as a newly described taxon or a new record.
ACKNOWLEDGEMENTS
We thank The Leverhulme Trust for financial support for this work; the Curators
and Collection Managers of herbaria that have loaned material or welcomed us on visits
(notably a, BK, BKF, BM, C, CMu, e, K, SING); the library staff of the royal Botanic
Garden edinburgh for their help in locating or obtaining protologues and other references;
and Christopher Fraser-Jenkins, John McNeill, Barbara Parris, alan Smith and John
Thompson for advice and information.