Hypolepis thysanochlaena Mickel & Beitel
Descripción
Rhizomes long-creeping, branched, ca 2.5 mm diam., with brown, lustrous, ctenitoid or mostly bristle-like hairs; fronds 60–100 cm long; stipes and axes yellow-brown to castaneous, unarmed, densely clothed with ctenitoid (and some bristle-like) hairs 1–2 mm long; blades deltate to ovate-deltate to lanceolate, 3–4-pinnate-pinnatifid; rachises somewhat flexuous to straight; costae adaxially broadly grooved with abundant ctenitoid hairs on margins, glandular hairs numerous abaxially on costae, veins, and surface; veins ending short of margins; sori round, indusial flaps thin, narrow, 0.5 X 0.1–0.3 mm, with ciliate margins.A
Forma de vida
TerrestreA
Ejemplar revisado
Chis (Breedlove 22056, DS, MEXU, 31732, DS, NY; González Espinosa et al. 1677, MEXU). Oax (Hellwig 414, NY; King 2123, MICH; Mickel 1061, 1150, 4679, 5360, NY).
A
A
Distribución
México (país) EndémicoA
Elevación
1050 – 2700 mA
Ecología y Hábitat
Roadsides and other disturbed open areas.A
Tipo de vegetación
Bosque de neblina/mesófilo, Bosque de pino-encino, Selva altaA
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
The New World taxa with non-spiny axes are in need of revision. This species and H. muenchii differ in blade hairiness, indusial width, and indusial margin from well known species of South America, such as H. bogotensis H. Karst. (with abaxial surfaces felted, hairy) and H. viscosa (H. Karst.) Mett. (with abundant adaxial glandular hairs and narrow (0.1–0.3 mm wide), ciliate indusia with glandular hairs on the surfaces). Collections from Chiapas cited as H. bogotensis H. Karst. by Smith (1981) belong to this species.
One collection (Mickel 1150B, Oaxaca, NY) with malformed spores, resembling this species in its glandular hairy lamina, seems to be a hybrid with H. muenchii, judging from the strongly flexuous stipes and erose indusial margins. The indusia are of intermediate width (0.3–0.5 mm wide). Breedlove 31732 (DS, NY) from Chiapas also has malformed spores and a chromosome number of 2n=ca. 50II + 54I at meiosis.A
One collection (Mickel 1150B, Oaxaca, NY) with malformed spores, resembling this species in its glandular hairy lamina, seems to be a hybrid with H. muenchii, judging from the strongly flexuous stipes and erose indusial margins. The indusia are of intermediate width (0.3–0.5 mm wide). Breedlove 31732 (DS, NY) from Chiapas also has malformed spores and a chromosome number of 2n=ca. 50II + 54I at meiosis.A