Acrosorus

Acrosorus
	Pressed specimens of
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Division:	Polypodiophyta
Class:	Polypodiopsida
Order:	Polypodiales
Suborder:	Polypodiineae
Family:	Polypodiaceae
Subfamily:	Grammitidoideae
Genus:	Acrosorus; Copel.
Type species
	; (Copel.) Copel.
Species
	See text.

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[]

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[]

The genus was created by Edwin Copeland in 1906, to accommodate a group of ferns similar to and until then classified in Davallia.^[4]

Species[]

As of February 2020, the Checklist of Ferns and Lycophytes of the World accepted the following species:^[1]

Acrosorus friderici-et-pauli (Christ) Copel.
(Copel.) Parris
Parris
(Christ) Copel.
Christ
(Alderw.) Parris
(Baker) Copel.
(Alderw.) Parris
Parris
Parris

References[]

^ Jump up to: ^a ^b Hassler, Michael & Schmitt, Bernd (January 2020), "Acrosorus", Checklist of Ferns and Lycophytes of the World, Version 8.20, retrieved 2020-02-18
^ Jump up to: ^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.
^ Jump up to: ^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.
^ Jump up to: ^a ^b ^c Copeland, Edwin (1906). "New Philippine Ferns". Philippine Journal of Science. 1 supp. 2: 158.

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[CFLW-1] Jump up to: ^a ^b Hassler, Michael & Schmitt, Bernd (January 2020), "Acrosorus", Checklist of Ferns and Lycophytes of the World, Version 8.20, retrieved 2020-02-18

[PPGI-2] Jump up to: ^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.

[parris2018-3] Jump up to: ^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.

[copel1906-4] Jump up to: ^a ^b ^c Copeland, Edwin (1906). "New Philippine Ferns". Philippine Journal of Science. 1 supp. 2: 158.

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