Flora of the Hawaiian Islands
General Information
DistributionA large genus comprising ca. 250 species in tropical and warmer temperate areas worldwide.
Terrestrial or sometimes epipetric; rhizomes short-creeping or erect, often stout, rarely with prop roots.
Fronds stipitate; stipe stramineous, reddish, brown or purple, scaly at the base; blade 1-4-pinnate-pinnatifid or tripartite-pedate, chartaceous to coriaceous, glabrous or hairy, pinnae often with short spines at base of ultimate costules, basal pair of pinna tending to be branched, or with more complex division than the others; veins free or anastomosing.
Sori linear, marginal to submarginal, connecting the vein endings, continuous except at apex and sinuses of ultimate segment; false indusium linear, continuous; paraphyses absent to abundant.
Spores tetrahedral or bilateral.
The name is derived from the Greek pteris, fern, from pteron, wing or feather, alluding to the frond shape.
David Lorence