Ctenitis grisebachii (Baker) Ching
Descripción
Rhizomes suberect, stout, caudices to 3 cm diam.; fronds large, to 150 cm long or more; stipes stramineous to brown, ca. 1⁄3–1⁄2 the frond length, to 60+ cm X 7 mm, throughout with brown stiff spreading lustrous, hair-like, flat scales 5–9 X 0.2–1 mm, underlain by glandular hairs 0.1 mm long and sometimes a few jointed hairs; blades light green, deltate-ovate, 2–3-pinnatepinnatifid, to ca. 75 X 70 cm; rachises abaxially with scales similar to those of stipes but shorter and less numerous; pinnae to ca. 15 pairs, proximal pair the longest, to 38 X 12 cm; segments entire to crenulate, rounded to acute at tips, margins with jointed hairs 0.1–0.5 mm long; veins simple or the basal ones sometimes forked, ending at the margins above the sinuses; indument on costae and costules abaxially of flat, brown scales 0.8–1 X 0.3–0.5 mm, also with appressed jointed hairs 0.1–0.3 mm long and small glands 0.1 mm on costae, costules, and veins, adaxially with sparse hairs 0.3 mm on veins; laminae between veins on both sides with appressed glandular hairs 0.1–0.2 mm long, or glabrescent adaxially; sori medial, with indusia brown to tan, 0.5–0.8 mm wide, persistent, glandular; 2n=164 (Jam).A
Forma de vida
TerrestreA
Ejemplar revisado
Chis (Breedlove 32211, DS; Hernández M. 513, MEXU, NY; Miranda 6973, MEXU). Gro (Lorea 1216, 1219, FCME). Ver (Finck 56, NY; Müller 1843, NY; Ventura A. 10731, ARIZ, XAL).A
Elevación
1300 – 1950 mA
Tipo de vegetación
Bosque de neblina/mesófiloA
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
This species is similar in size to C. equestris, but differs in the segment margins with jointed hairs 0.1–0.5 mm long; stipe and costal scales narrower, lustrous, stiff, and uniformly dark brown; costules with glandular hairs and flat, brown scales 0.8–1 X 0.3–0.5 mm; pinnae glandular on laminae and veins abaxially; sparse jointed hairs 0.3 mm on veins adaxially; and sori with brown to tan, persistent indusia 0.5–0.8 mm wide. The combination of the ciliate segment margins, flat costal scales, dark brown, flat, stiff, spreading stipe scales, and large, persistent, glandular indusia distinguishes C. grisebachii from other bipinnate-pinnatifid (or more divided) species in Mexico. Citation of this species from Nayarit by Mickel and Beitel (1988) was based on misidentified specimens of Ctenitis equestris.A