A New Species of Remya (Asteraceae: Astereae) on Kaua'i and a Review of the Genus

Remya (tribe Astereae) is a genus of three species endemic to the Hawaiian Islands. Until 1985, only two species, R. mauiensis and R. kauaiensis, were known. They were both thought to be extinct. Although rediscovered in 1971 and 1983, respectively, the plants are very rare and the populations endangered. A new species in the genus is described: R. montgomeryi sp. nov., known only from cliffs near the rim of Kalalau Valley, Kaua'i. The most diagnostic features distin- guishing it within the genus include complete lack of pubescence; long, thin peduncles; heads with a larger, hemispherical involucre; acute to obtuse phyllaries; and more numerous disk florets. Examination of material of all three species suggests that the heads are monoecious; the ray florets are pistillate and disk florets functionally staminate. Remya kauaiensis and R. montgomeryi differ from R. mauiensis in having dimorphic disk florets; the outer ones are smaller, have funnelform corollas, and apparently are neutral or pistillate whereas the inner ones are considerably larger, have cam- panulate corollas, and appear to be functionally staminate. Remya may be related to the Australasian genus Olearia. Remya is a small genus in the tribe Astereae. Three species can be distinguished, all endemic to the Hawaiian Islands. Two of them, R. kauaiensis Hillebrand and R. mauiensis Hille- brand, were described in 1888. Apparently nei