| Pteridophyte | Literature for Reholttumia hudsoniana
Palmer, 2003. |
| Thelypteridaceae | Bibliography |
| Reholttumia hudsoniana | |
Common name(s): laukahi |
| General Information | ||
|---|---|---|
| Distribution | Hawaiian Islands.In the Hawaiian Islands, endemic to Kaua`i, O`ahu, Moloka`i, Lana`i, Maui, Hawai`i. | |
| Habitat | Mesic to wet forests | |
| Elevation | (20-)155-760 m |
|
| Habit |
Terrestrial, medium-sized to large; rhizomes decumbent to erect. |
|
| Leaves |
Fronds to 145 cm long; stipe grooved, ridges clothed with sharp-tipped hairs, scales only at very base, sparse, brown, soon deciduous; blade 1-pinnate-pinnatifid, membranous to chartaceous; rachises with 2-4 rounded adaxial ridges with grooves between them, with abundant, short, white, sharp-tipped hairs adaxially; pinnae short-stalked to adnate, lanceolate, deeply lobed, cut about 1/2-2/3 of distance to costae, middle pinnae to 25 cm long, acuminate, basal 2-6 pairs abruptly and markedly smaller than next distal pinnae, smallest basal pinnae less than 1 cm long and round, sinuses wide with prominent, cartilaginous, sometimes toothed sinus membranes, aerophores prominent on abaxial bases of pinna costae (more prominent on living material), adaxial surfaces with scattered short, thick, pointed hairs between veins and pointing toward margins, similar but shorter hairs sparse on costae and veins, abaxial surfaces mostly glabrous; ultimate segments rectangular, oblong, margins with white, pointed hairs, tips obtuse, minutely dentate; veins pinnately divided, 6-8 pairs, unforked, 1 pair of basal veins from adjacent lobes uniting to form excurrent veins extending to sinuses, more distal veins ending at cartilaginous sinus bases or on margins of ultimate segments. |
|
| Sori |
Sori medial, 8-12 per lobe; indusia thin, small, with a few hairs. |
|
| Notes |
Name honors Navy Capt. William Levereth Hudson (1794-1862), commander of the Peacock, one of the vessels of the U.S. Exploring Expedition (1838-1842). |
|
| Contributor |
Sally Eichhorn |