Bolbitis umbrosa Ching
Descripción
Rhizomes short-creeping, ca. 7 mm diam.; rhizome scales brownish, to 5 X 2 mm, entire; fronds subdistant, 50–115 cm long, the fertile shorter than the sterile; stipes 20–65 cm X 2–5 mm, those of the sterile fronds less than 1⁄2 the sterile frond length, those of fertile fronds 1⁄2–3⁄4 the fertile frond length; sterile blades thinly chartaceous, 30–70 cm, pinnate-pinnatifid, apices pinnatifid, not flagellate or proliferous; sterile pinnae 12–21 X 3.7–7(–10) cm, 3–5 free pairs + 4–10 additional pairs connected by wings along rachises, proximal pinnae inequilateral with basiscopic segments longer and more deeply lobed than acroscopic segments, distal pinnae ± equilateral and strongly decurrent; sterile segments subentire to shallowly lobed or pinnatifid, with a small tooth at the base of each sinus between segments; veins areolate, each areole usually lacking included free veins; fertile blades pinnate-pinnatifid, 10–35 X 7–16 cm; sporangia ± covering the abaxial surfaces of fertile blades but with a sterile zone along the main veins.A
Forma de vida
TerrestreA
Ejemplar revisado
Chis (Breedlove 21621, 22483, DS, NY; 30866, DS, MEXU). Ver (Purpus 4355, UC, US; Purpus 4354, 4371, 11142, 12082, 16723, US).A
Elevación
450 – 1000 mA
Tipo de vegetación
Selva altaA
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
Bolbitis umbrosa is easily confused with B. aliena, which has similar venation, without included veinlets in the areoles. The former differs in having more numerous pinna pairs, to 5 pairs of completely free pinnae, more deeply pinnatifid (even bipinnatifid) proximal pinnae, and small teeth at the bases of sinuses.A