Monographs Details: Ophioglossum palmatum L.
Authority: Proctor, George R. 1989. Ferns of Puerto Rico and the Virgin Islands. Mem. New York Bot. Gard. 53: 1-389.
Description:Species Description - Plants epiphytic; rhizome cylindric, 1-2.5 cm
long, 1-2 cm thick, densely clothed with yellowish-
brown hairlike scales, and producing numerous
fleshy roots. Fronds several, arching or
laxly pendent, up to 50 cm long (rarely to 75 cm); Stipes 5-40 cm long. Expanded blades 4-30 cm
broad, narrowly to broadly obdeltate and palmately lobed, the lobes few (2-10), often unequal, usually simple and entire (rarely forked),
the apex blunt to acute or acuminate-attenuate
and somewhat ribbon-like. Tissue bright green,
glabrous, with irregularly hexagonal venation.
Sporophylls 1-15 to a fertile frond, b o m e in a
row toward the apex of the stipe below base of
the blade, with individual stalks 0.2-6 cm long
and linear-oblong fertile spikes 1-3 c m long, these
having 10-60 pairs of fused sporangia. Spores
closely pitted-verrucose, 45-60 µm in diam.
Lectotype. Plumier, Traite foug. Amer., t. 163,
based on material originally found at Le Fond
de Baudin, nr. Leogane, Haiti.
Syn, Cheiroglossa palmata (Linnaeus) K. Presl, Suppl.
tent, pterid. 57. 1845.
Ophioderma palmata (Linnaeus) Nakai, Bot. Mag.
(Tokyo) 39: 193. 1925.