Flora of the Hawaiian Islands
Pteridophyte Literature for Pteris irregularis
Palmer, 2003.
   Pteridaceae Bibliography
      Pteris irregularis

Common name(s): `ahewa (O`ahu), `iwa puakea (Maui), mana
General Information
DistributionHawaiian Islands.In the Hawaiian Islands, endemic to Kaua`i, O`ahu, Moloka`i, Lana`i, Maui, Hawai`i.

Pteridaceae - Pteris irregularis

Click here for detailed USGS map by Jonathan Price
HabitatDry to mesic forests
Elevation450-1920 m
Terrestrial, medium-sized to large; rhizomes decumbent.
Fronds 60-100(-150) cm long; stipe 1/2 or more frond length, straw-colored, glossy, glabrous, except at very base; blade regularly 1-pinnate-pinnatifid to 2-pinnate-pinnatifid, bright green, ovate or ovate-triangular, chartaceous, pinnae cut to winged rachises, tips pinnatifid; rachises winged nearly to basal pinna pairs, or often only to space between first or second pinna pairs; pinnae 8-12 pairs, cut to winged rachis, lobes and irregular projections present on most pinnae (absent on the most distal pinnae), numerous and regularly arranged, well separated, long, pectinate, obliquely pointing toward pinna tips; ultimate segments wide, cut only to winged costae.
Coenosori long on pinna lobes and wings.
Sally Eichhorn