Argyrochosma lumholtzii (Maxon & Weath.) Windham
-
Authority
Mickel, John T. & Smith, Alan R. 2004. The pteridophytes of Mexico. Mem. New York Bot. Gard. 88: 1-1054.
-
Family
Pteridaceae
-
Scientific Name
-
Description
Species Description - Rhizomes compact, erect; rhizome scales linear, 4–5 mm long, entire, somewhat contorted, orange-brown; fronds 7–15 cm long, clumped; stipes ca. 2/5 the frond length, terete, black, glabrous; blades deltate-lanceolate or deltate-ovate, bipinnate, herbaceous or subcoriaceous, glabrous, gray-green; rachises straight, terete, glabrous; pinnae 6–8 pairs; segments remote, orbicular or slightly oblong to subcordate, 3–4 mm diam., entire, the terminal deltate, non-articulate, the dark color of the stalks passing into the segment bases; segment margins unmodified, plane to slightly recurved; sporangia 64-spored, borne on the distal 1/2–1/3 of veins.
-
Discussion
Notholaena lumholtzii Maxon & Weath., Contr. Gray Herb. 127: 16. 1939. Type. Mexico. Sonora: Huehuerachi, Hartman (Lumholtz Exped.) 298 (US!, frag. NY!; isotypes GH!, PH!).
Argyrochosma lumholtzii differs from A. jonesii by the blackish axes and the bipinnate blades (vs. castaneous to brownish axes and the blades 2–3-pinnate).
-
Distribution
Habitat data absent; 1300 m. Mexico.
Mexico North America|