|
Acrosorus
Acrosorus is a genus of ferns in the family Polypodiaceae, subfamily Grammitidoideae, according to the Pteridophyte Phylogeny Group classification of 2016 (PPG I).[2] It is known from the Philippines, Malesia, Thailand, and the Pacific islands. DescriptionMembers of the genus have radially symmetric (rather than flattened) rhizomes, covered with hairless scales of uniform color.[3] Their leaves may be partly cut, into lobes, or fully divided into pinnae. Their veins are at most a few times forked, and lack hydathodes.[3] Each lobe or pinna of a fertile leaf bears a single sorus near the tip;[4] the edges of the lobes or pinnae are rolled under and fused near the tip to protect the sorus.[3][4] Leaf hairs may be single setae (bristles), single catenate hairs (consisting of chains of cells), or branched catenate hairs, with setae for branches.[3] TaxonomyThe genus was created by Edwin Copeland in 1906, to accommodate a group of ferns similar to Prosaptia and until then classified in Davallia.[4] SpeciesAs of May 2024[update], the Checklist of Ferns and Lycophytes of the World accepted the following species:[1]
References
|
||||||||||||||||||||||||||||||||||
_Copel.(MNHN_P01572414).jpg)
Portal di Ensiklopedia Dunia
