特徵描述
作者
DEVOL, CHARLES E. and SHIEH, WANG-CHUENG
型態特徵
Terrestrial ferns forming thickets, usually growing on exposed hillsides; rhizomes long-creeping, usually growing near surface of soil, protostelic (1 exception), covered with branched hairs or fringed scales; stipes usually distant, slender, terete, wiry; c.s. of base of stipe with 1 C-shaped bundle with inrolled ends. Fronds pseudo-dichotomously branched, with a dormant apical bud between branches; apical bud covered with hairs or scales and often with stipule-like bracts; the dormant bud giving rise to an extension of the rachis at a later season, thus producing a very long rachis with side branches; ultimate branches pinnatifid or bipinnatifid, cut nearly to costa; veins free, simple or forked. Sori on back of veins, exindusiate; sporangia few per sorus (2-15), subsessile or with very short stalk; annulus complete, oblique, dehiscing vertically. Spore number large (200-800), trilete or monolete, smooth. Mature gametophyte ribbon-like with midrib.
屬
Considered as having one to six genera depending on concept of author. One hundred and twenty species. The genus Stromatopteris (not found in Taiwan) is usually placed in this family but differs so much from the others that it is not included in the above family description.
參考文獻
Diplopterygium 裏白屬
作者
DEVOL, CHARLES E. and SHIEH, WANG-CHUENG
型態特徵
Large scandent ferns of indefinite length, often reaching tree tops (5-8 m long); primary pinnae up to 2 m long; rhizomes covered with lanceolate scales; primary pinnae (ultimate branches) bipinnatifid; ultimate segments cut nearly to costa; veins free, once forked; dormant bud covered with imbricating scales and usually with a pair of stipule-like bracts. Sori with 2-6 sporangia, borne on acroscopic fork of veinlet.
Hicriopteris is the best known name for this section of Gleichenia, but Holttum (in Reinwardtia 4: 261. 1957) has pointed out that H. speciosa, which was the first species to be called Hicriopteris, must be ruled out as a genus name for those ferns belonging to the Gleichenia longissima group. The next name in order is Diploptergyium which was used as a sectional name by Diels; Holttum only uses Diplopterygium as a subgeneric name since he feels the basic differences between the subgenera of Gleichenia are not great, and this is so (Holttum in Reinwardtia 4: 258. 1957) but true Gleichenia as represented by G. microphylla and G. vulcanica appear so different because of their small size that I prefer to recognize these large scandent ferns as a distinct genus.
