脆铁线蕨

SPECIES

1. KingdomPlantae
2. PhylumTracheophyta
3. ClassPolypodiopsida
4. OrderPolypodiales
5. FamilyPteridaceae

Native toBahamas, Belize, Brazil Northeast, Brazil South, Cayman Is., Colombia, Costa Rica, Cuba, Dominican Republic, El Salvador, Florida, Guatemala

Stems short-creeping; scales bicolored, centers dark reddish brown, margins pale tan, erose-ciliate. Leaves arching or sometimes pendent, closely spaced, 20--110 cm. Petiole 1--3 mm diam., glabrous, occasionally glaucous. Blade trowel-shaped, pinnate, 12--60 × 12--60 cm, gradually reduced distally, glabrous; proximal pinnae 3-pinnate; rachis straight, glabrous, not glaucous. Segment stalks 1--5 mm, with dark color ending abruptly at segment base, terminating in cupulelike swelling at base of segment (unlike any other species of Adiantum in the flora). Ultimate segments fan-shaped or rhombic, about as long as broad; base cuneate; apex rounded or acute, lobed, lobes separated by narrow incisions 0.5 mm wide. Indusia transversely oblong to crescent-shaped, 0.5--2 mm, glabrous. Spores mostly 40--58 µm diam. 2 n = 60.

via GBIF · Kew POWO

Wikidata facts