Acrosorus
| Acrosorus | |
|---|---|
_Copel.(MNHN_P01572414).jpg)
| |
| Pressed specimens of Acrosorus streptophyllus | |
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Division: | Polypodiophyta |
| Class: | Polypodiopsida |
| Order: | Polypodiales |
| Suborder: | Polypodiineae |
| Family: | Polypodiaceae |
| Subfamily: | Grammitidoideae |
| Genus: | Acrosorus Copel.[1] |
| Type species | |
| Acrosorus exaltatus (Copel.) Copel.[2]
| |
| Species | |
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.
Description
[edit]Members 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]
Taxonomy
[edit]The genus was created by Edwin Copeland in 1906, to accommodate a group of ferns similar to Prosaptia and until then classified in Davallia.[4]
Species
[edit]As of May 2024[update], the Checklist of Ferns and Lycophytes of the World accepted the following species:[1]
- Acrosorus friderici-et-pauli (Christ) Copel.
- Acrosorus pectinatus Parris ined.
- Acrosorus reineckei (Christ) Copel.
- Acrosorus schlechteri Christ
- Acrosorus sclerophyllus (Alderw.) Parris
- Acrosorus streptophyllus (Baker) Copel.
- Acrosorus subtriangularis (Alderw.) Parris
- Acrosorus tenuis Parris ined.
- Acrosorus vallatus Parris ined.
References
[edit]- ^ a b Hassler, Michael (18 May 2024), "Acrosorus", World Ferns. Synonymic Checklist and Distribution of Ferns and Lycophytes of the World, 19.3, retrieved 2024-05-19
- ^ a b PPG I (2016). "A community-derived classification for extant lycophytes and ferns". Journal of Systematics and Evolution. 54 (6): 563–603. doi:10.1111/jse.12229. S2CID 39980610.
- ^ a b c d Parris, Barbara S (2018). "The Flora Malesiana account of grammitid ferns (Polypdiaceae): a progress report with an illustrated synoptic key to Malesian genera". Sibbaldia (16): 25–27. doi:10.24823/Sibbaldia.2018.245. S2CID 134350895.
- ^ a b c Copeland, Edwin (1906). "New Philippine Ferns". Philippine Journal of Science. 1 (supp. 2): 158.