Flora of the Hawaiian Islands
Pteridophyte Literature for Nephrolepis cordifolia
Lorence & Wagner, 2019.
   Nephrolepidaceae Bibliography
      Nephrolepis cordifolia
General Information
DistributionDistribution uncertain but apparently indigenous from the Indian Ocean Islands to the Pacific Region as far east as the Hawaiian Islands.In the Hawaiian Islands, indigenous to Kaua`i, O`ahu, Moloka`i, Lana`i, Maui, Hawai`i.

Click here for detailed USGS map by Jonathan Price
HabitatMesic to wet forests
Elevation440-1525 m
Terrestrial or occasionally epiphytic. Rhizomes erect to decumbent, with fronds densely clustered, stolons with occasional attached underground tubers; stolons and tubers bearing pale brown linear-lanceolate scales 1.5‒3 mm long, 0.2‒0.5 mm wide, margin subentire.
Fronds usually erect, to 30‒70 cm long; stipe brown, 8‒12 cm long, rhizome, stipe, and rachis with dense pale brown linear-lanceolate scales 3‒4 mm long, 0.4‒0.6 mm wide, broader at base, margin subentire; blade linear to linear-elliptic, tapering gradually toward base and apex, 25‒70 cm long, 3‒5(‒6) cm wide, pinnae numerous, ca. (25‒)50‒80 on a side, 10‒25(‒30) mm long, 5‒7 mm wide, often deciduous with age, oblong to oblong-triangular, acroscopic base auriculate and overlapping the rachis, basiscopic base rounded, apex obtuse to acute, margin subentire to crenate-dentate, glabrous or sometimes with scattered hair scales abaxally; fertile pinnae located medially on blade, longer and usually slightly narrower than the sterile, with margin and apex more deeply crenate; veins mostly forked once, ending in prominent hydathodes; rachis densely scaly with scales smaller than those of stipe.
Sori medial to supramedial, 6-10 pairs on fully fertile pinnae; indisium reniform, 0.8-1.4 mm wide, attached at open sinus.
Nancy Khan