Rhizome horizontal, creeping, ca. 2 mm diam.; rhizome hairs stiff, dark brown; fronds erect, 2745 cm tall; stipe (grooved on the upper surface and laterally), ca. ½ the frond length, ca. 1 mm diam., stramineous, glabrate; blade deltate-lanceolate, 9-18 cm wide, once-pinnate, subcoriaceous; pinnae 5-9 pairs, mostly alternate, lanceolate, truncate at base, often slightly excavate on lower margin, apex acuminate, margin minutely serrulate, lamina hirsute with minute white hairs on lower surface, glabrous above, bluish-green iridescent above; veins free; fertile pinnae remote from the sterile pinnae, ca. equal to or occasionally surpassing the sterile blade in height; spores tetrahedral, striate, ridges smooth, close; chromosome number n = 38. Distinct by its narrowly deltate pinnae, 1–1.7 cm wide; pinna bases cuneate to rounded or truncate; laminae blue-green adaxially; 2n=76 (Col). Rare on lightly shaded limestone outcrops at lower elevations near Pacific Coast; 400–1100 m. Mexico. Rare on lightly shaded limestone outcrops at lower elevation near Pacific Coast; Pochutla; 400-700 m. Mexico (Col, Gro, Oax). Rhizome horizontal, creeping, ca. 2 mm diam.; rhizome hairs stiff, dark brown; fronds erect, 2745 cm tall; stipe (grooved on the upper surface and laterally), ca. ½ the frond length, ca. 1 mm diam., stramineous, glabrate; blade deltate-lanceolate, 9-18 cm wide, once-pinnate, subcoriaceous; pinnae 5-9 pairs, mostly alternate, lanceolate, truncate at base, often slightly excavate on lower margin, apex acuminate, margin minutely serrulate, lamina hirsute with minute white hairs on lower surface, glabrous above, bluish-green iridescent above; veins free; fertile pinnae remote from the sterile pinnae, ca. equal to or occasionally surpassing the sterile blade in height; spores tetrahedral, striate, ridges smooth, close; chromosome number n = 38. Distinct by its narrowly deltate pinnae, 1–1.7 cm wide; pinna bases cuneate to rounded or truncate; laminae blue-green adaxially; 2n=76 (Col). Distinct by its narrowly deltate pinnae, 1–1.7 cm wide; pinna bases cuneate to rounded or truncate; laminae blue-green adaxially; 2n=76 (Col). Rare on lightly shaded limestone outcrops at lower elevations near Pacific Coast; 400–1100 m. Mexico. Rare on lightly shaded limestone outcrops at lower elevation near Pacific Coast; Pochutla; 400-700 m. Mexico (Col, Gro, Oax). Rare on lightly shaded limestone outcrops at lower elevation near Pacific Coast; Pochutla; 400-700 m. Mexico (Col, Gro, Oax).General Information
Source: [
Distribution
Source: [
Memoirs of the New York Botanical Garden
General Information
