Radiovittaria (Benedict) E.H.Crane
Descripción
Rhizomes suberect, radial, solenostelic, with strongly clathrate scales at the apex; fronds polystichous, clumped, 1–50(–110) cm long; stipes dark, flattened to terete; blades simple, entire, linear to narrowly elliptic, short-stipitate, mostly less than 50 X 0.2–1(–1.8) cm, costate; veins obscure, anastomosing and forming submarginal commissural veins parallel to the midrib, without included veinlets; sori of two submarginal continuous lines, one on each side of the midrib, surficial or in shallow to deep grooves; indusia absent; paraphyses reddish, with a funnelform (obconic) apical cell; spores bilateral, fusiform, hyaline to yellowish, smooth to sparsely papillate with fine spherical deposits; gametophytes with gemmae single; x=?A
Forma de vida
EpífitaA
Distribución
México (país) Nativo y no endémicoA
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
Radiovittaria comprises about eight neotropical species, and is easily distinguished from Vittaria by the suberect rhizomes with radially arranged fronds, reddish paraphyses with funnelshaped apical cells, usually broader blades, and dark purplish brown lustrous stipes. It is apparently more closely related to Hecistopteris, differing from that in the entire linear blades. In addition, it is closely related to the Old World Haplopteris, a larger genus of about twenty species, according to Crane (1997). Until recently, Radiovittaria was considered part of a more inclusive genus Vittaria, which has been shown by Crane et al. (1995) and Crane (1997) to be polyphyletic, as treated in most taxonomic works.
The vittarioid ferns (Vittariaceae, including also the genera Ananthacorus, Anetium, Hecistopteris, Polytaenium, Scoliosorus, and Vittaria, in Mexico) are monophyletic and believed to be most closely related to, and the sister group of Adiantum, which see. Vittariaceae plus Adiantum form the sister group to many other (but not all) genera in the Pteridaceae s.l., as that family is often circumscribed (Gastony & Rollo, 1995; Hasebe et al., 1995; Pryer et al., 1995; Cranfill, unpubl. data).
A
The vittarioid ferns (Vittariaceae, including also the genera Ananthacorus, Anetium, Hecistopteris, Polytaenium, Scoliosorus, and Vittaria, in Mexico) are monophyletic and believed to be most closely related to, and the sister group of Adiantum, which see. Vittariaceae plus Adiantum form the sister group to many other (but not all) genera in the Pteridaceae s.l., as that family is often circumscribed (Gastony & Rollo, 1995; Hasebe et al., 1995; Pryer et al., 1995; Cranfill, unpubl. data).
A