The following Participating Institutions are custodians for this species in the CPC National Collection:
The conservation of Schiedea kaalae is fully sponsored.
David Orr contributed to this Plant Profile.
Schiedea kaalae is a small, sometimes woody perennial with thick, leathery leaves usually tufted at the topmost portion of the stem. Its flowers are borne on large, open panicles. Schiedea kaalae was historically known from the north-central and south-central Waianae Mountains and the northern Koolau Mountains of O`ahu. Currently, only less than 25 individuals remain in 7 small populations. These populations are at great risk of habitat degradation caused by feral pigs and goats, invasion of alien plant species, and fire. Schiedea kaalae appears to be long-lived, but there is no evidence of natural regeneration by seed. Seedlings of Schiedea kaalae are apparently consumed by introduced slugs and snails.
Distribution & Occurrence
Steep slopes and shaded sites in diverse mesic forests at an elevation of 210 to 790 meters (USFWS 1995, 1998).
|Waianae Mountains- 5 populations
Koolau Mountains- 2 populations
Total individuals less than 25 remaining.
(USFWS 1998, 2001)
Conservation, Ecology & Research
Competition from alien plant species.
Predation by slugs and snails.
Small number of extant individuals.
(USFWS 1998, 2001)
Propagation- greenhouse and in vitro by seed and cuttings.
Fencing in the Palawai area.
Control competing alien plant species within enclosures.
Control snails and slugs.
Coulter, J.M.; Rose, J.N. 1900. Monograph of the North American Umbelliferae. Contributions to the U. S. National Herbarium. 7: 1-256.
Llop, J.; Woolliams, K. 1991. Notes on the Propagation of Schiedea at Waimea. Notes from Waimea Arboretum & Botanical Garden. 18: 5-9.
Schulz, T.T.; Carpenter, A.T. Monitoring survival, Growth, and Reproduction of Aletes humilis. Gen. Tech. Rep. RM-GTR-283. Proceedings of the Southwestern Rare and Endangered Plant Conference; September 11-14; Flagstaff, AZ. In: Maschinski, J.; Hammond, H
Sherff, E.E. 1943. Some additions to our knowledge of the genus Schiedea. Cham. & Schlecht. American Journal of Botany. 30: 606-608.
USFWS. 1991. Determination of Endangered Status for 26 Plants From the Waianae Mountains, Island of Oahu, Hawaii. Federal Register. 56: 55770-55786.
USFWS. 2002. Designations of Critical Habitat for Plant Species From the Island of Oahu, Hawaii. Federal Register. 67, 102: 37108-37156.
Weber, W.A. 1984. New names and combinations, principally in the Rocky Mountain flora--IV. Phytologia. 55: 1-11.
Weller, S.G.; Sakai, A.K.; Wagner, W.L.; Herbst, D.R. 1990. Evolution of dioecy in Schiedea (Caryophyllaceae:Alsinoideae) in the Hawaiian Islands: Biogeographical and ecological factors. Systematic Botany. 15: 66-76.