Cyathea divergens Kunze
Forma de vida
TerrestreA
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
Cyathea divergens var. tuerckheimii (Maxon) R.M.Tryon, Contr. Gray Herb. 206: 56. 1976
Cyathea jurgensenii E.Fourn., Mexic. Pl. 1: 135. 1872
Cyathea tuerckheimii Maxon, Contr. U.S. Natl. Herb. 13: 4. 1909
Trunks to 12 m tall; fronds to 4 m long; stipes brown to tan, lightly to strongly spiny, spines dark, sharp, scales long, bicolorous, dark brown with pale erose margins, stipes very hairy with basal scurf whitish to tan; blades bipinnate-pinnatifid, pinnae stalked, 0.5–2.7 cm long, pinnules usually stalked 1–6 mm; segments obtuse, strongly falcate, crenulate, firm-textured, costae hairy adaxially, glabrous abaxially, segments glabrous on both sides but with sparse brown, lustrous, generally flat scales on segment midveins abaxially, scales most abundant in pinna axils; fertile veins simple or 1-forked; sori medial, indusia globose.
Distribution. Wet montane forests of Atlantic slope; 300–2500 m. Mexico; Bel, Guat, Hond, Nic.
Selected Specimens Examined. Chis (Breedlove 25384, 29566, MEXU; Dressler 1688, MEXU, NY). Oax (Mickel 6503, NY; Rzedowski 33393, MEXU). Pue (Arreguín 537, NY, 540, XAL; Riba et al. 296, MEXU). Ver (Pérez et al. 114, MEXU; Ventura A. 9269, NY).
Cyathea divergens is distinct among Mexican species of Cyathea in its lack of costal hairs on the abaxial blade surfaces and the frequently stalked (1–6 mm) pinnules. There is often a black, tar-like fungus on the adaxial laminar surfaces. Var. divergens occurs from Costa Rica to Surinam and Peru.
Categoría NOM-059-SEMARNAT-2010:
Sujeta a protección especial (Pr)
A
Cyathea jurgensenii E.Fourn., Mexic. Pl. 1: 135. 1872
Cyathea tuerckheimii Maxon, Contr. U.S. Natl. Herb. 13: 4. 1909
Trunks to 12 m tall; fronds to 4 m long; stipes brown to tan, lightly to strongly spiny, spines dark, sharp, scales long, bicolorous, dark brown with pale erose margins, stipes very hairy with basal scurf whitish to tan; blades bipinnate-pinnatifid, pinnae stalked, 0.5–2.7 cm long, pinnules usually stalked 1–6 mm; segments obtuse, strongly falcate, crenulate, firm-textured, costae hairy adaxially, glabrous abaxially, segments glabrous on both sides but with sparse brown, lustrous, generally flat scales on segment midveins abaxially, scales most abundant in pinna axils; fertile veins simple or 1-forked; sori medial, indusia globose.
Distribution. Wet montane forests of Atlantic slope; 300–2500 m. Mexico; Bel, Guat, Hond, Nic.
Selected Specimens Examined. Chis (Breedlove 25384, 29566, MEXU; Dressler 1688, MEXU, NY). Oax (Mickel 6503, NY; Rzedowski 33393, MEXU). Pue (Arreguín 537, NY, 540, XAL; Riba et al. 296, MEXU). Ver (Pérez et al. 114, MEXU; Ventura A. 9269, NY).
Cyathea divergens is distinct among Mexican species of Cyathea in its lack of costal hairs on the abaxial blade surfaces and the frequently stalked (1–6 mm) pinnules. There is often a black, tar-like fungus on the adaxial laminar surfaces. Var. divergens occurs from Costa Rica to Surinam and Peru.
Categoría NOM-059-SEMARNAT-2010:
Sujeta a protección especial (Pr)
A