Ctenitis hemsleyana (Baker) Copel.
Descripción
Rhizomes erect, stout, caudices 1.5–3.5 cm diam.; fronds (25–)50–90 cm long; stipes light to dark brown, nearly equalling the blades, to 45 cm X 2–4 mm, bases with dark brown to black, spreading scales 5–10 X 0.3–0.8 mm, these strongly inrolled and clathrate at the bases; blades dark green, deltate, tripartite, proximal pinna pair pinnate-pinnatisect, exaggerated basiscopically, suprabasal pinnae merely pinnatisect, (14–)25–40 X (8–)16–40 cm; rachises abaxially with scattered to dense, dark, hair-like scales 3–4 mm long and sparse to dense jointed hairs 0.1 mm long; pinnae 7–12(–16) pairs, proximal pair bipinnatepinnatisect, inequilaterally deltate, the longest (5–)10–16 X (3–)8–12 cm, stalked to 5 mm, basiscopically enlarged, largest basiscopic pinnules to 8 X 1.8 cm, suprabasal pinnae pinnatisect; segments subentire to crenulate, often curved, acute at tips, margins eciliate; veins unbranched, ending very close to margins above the sinuses; indument on costae abaxially of scattered, dark brown, inrolled scales 1–1.5(–2) mm long and jointed hairs 0.1–0.3 mm long; laminae between veins glabrous on both sides; sori inframedial or subcostular, exindusiate, or nearly so.A
Forma de vida
TerrestreA
Ejemplar revisado
Chis (Breedlove 35186, DS, MEXU; Croat 46382, UC). Hgo (Luna et al. 809, FCME). Oax (Mickel 952, 6608, ENCB, NY). Pue (Rzedowski 29994, ENCB, NY, 32425, ARIZ, CHAPA, ENCB). Ver (Ortiz J. 13, CHAPA, ENCB; Purpus 6060, UC, US).A
Elevación
900 – 1900 mA
Tipo de vegetación
Bosque de neblina/mesófilo, Selva altaA
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
The exaggerated basal pinnae in otherwise pinnatepinnatisect blades and the strongly inrolled scales distinguish C. hemsleyana from all other Mexican Ctenitis except C. erinacea. From that species, C. hemsleyana differs in having smaller fronds, with usually fewer than 10 pinna pairs above the proximal pinnae, and exindusiate sori (indusia to 0.5 mm diam. in C. erinacea). Ctenitis erinacea also has more elongate blades above the proximal pinnae with more pinna pairs (12 or more) that are at right angles to the rachis.
A few specimens from Veracruz, e.g., Ramírez 687 (XAL), have very small, ciliate-margined indusia, rather scaly stipes and rachises, and reduced pinnules at the bases of proximal pinnae and thus vary in the direction of C. erinacea.
A
A few specimens from Veracruz, e.g., Ramírez 687 (XAL), have very small, ciliate-margined indusia, rather scaly stipes and rachises, and reduced pinnules at the bases of proximal pinnae and thus vary in the direction of C. erinacea.
A