Pentagramma triangularis subsp. maxonii (Weath.) Windham, E.Wollenw. & Yatsk.

Authority

Mickel, John T. & Smith, Alan R. 2004. The pteridophytes of Mexico. Mem. New York Bot. Gard. 88: 1-1054.

Family

Pteridaceae

Scientific Name

Pentagramma triangularis subsp. maxonii (Weath.) Windham, E.Wollenw. & Yatsk.

Description

Species Description - Fronds 6–22(–34) cm, clumped; stipes 1/2–3/4 the frond length, glabrous, not viscid-glandular, occasionally white-farinose proximally; blades broadly deltate-pentagonal, herbaceous (but not leathery), not viscid-glandular, proximal basiscopic lobes of basal pinnae pinnatifid, the two pinna pairs above the basal pair regularly pinnatifid; adaxial surfaces with scattered yellow capitate glands; abaxial surfaces white-farinose; 2n =120 (USA).

Discussion

Pityrogramma triangularis (Kaulf.) Maxon var. maxonii Weath., Rhodora 22: 119. 1920. Type. U.S.A. Arizona: Rincon Mtns, head of Rincon Valley, Blumer 3271 (US!; isotypes ARIZ!, DS!, GH!, MO!).

Specimens intermediate between subsp. maxonii and both subsp. triangularis and subsp. viscosa occur

Distribution

Pine and oak woodlands; 50–1520 m. USA (Ariz, Calif); Mexico.

Mexico North America| Arizona United States of America North America| California United States of America North America|