Pteridium arachnoideum Maxon
Descripción
Fronds (1–)1.5–3 m long; blades with free lobes or rarely longdecurrent segment bases between ultimate segments; rachises glabrous to slightly pubescent; penultimate axes pubescent abaxially with hairs scattered to dense, curly, clear, 0.5 mm, with dark end walls, adaxially with hairs white, especially in medial grooves; costae and veins usually sulcate abaxially; laminar surfaces densely hairy abaxially on veins with hairs 0.5–0.8 mm, twisted, white, and hairs minute, arachnoid, white, covering the laminar surfaces between veins, adaxially with scattered, white hairs mostly along margins, minute glandular hairs absent; false indusia 0.1–0.3 mm wide with erose margins with rare to scattered cilia; 2n=104 (Trin), 208 (Galapagos).A
Forma de vida
TerrestreA
Ejemplar revisado
Chis (Breedlove 21816, NY). Gro (Hinton 14069, NY). Hgo (Pérez S. 623, ENCB, MEXU). Jal (McVaugh & Koelz 1159, MEXU). Méx (Hinton 7371, NY). Oax (Mickel 4742, 7146, NY). Pue (Clausen 7466, NY). Tam (Lof 759, UC). Ver (Purpus 6191, NY).
Unverified, Doubtful, or Mistaken Reports. Mor (reported by Riba et al., 1996, but cited specimens misidentified, or doubtful). Tab (reported by Magaña, 1992, but figured plant is P. caudatum).
A
Unverified, Doubtful, or Mistaken Reports. Mor (reported by Riba et al., 1996, but cited specimens misidentified, or doubtful). Tab (reported by Magaña, 1992, but figured plant is P. caudatum).
A
Elevación
100 – 2450 mA
Ecología y Hábitat
Open, disturbed areas.A
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
Pteridium arachnoideum is distinguished most readily by free lobes between the segments near the tips of the pinnae.A