Geniostoma imadae (Loganiaceae), a new single-island endemic species from Kaua‘i, Hawaiian Islands

By

Wood, Kenneth Richard, 1953-
Lorence, David H
Wagner, Warren Lambert
Fawcett, Susan

Type

Article

Date of Publication

2025-6-10

Original Publication

PhytoKeys

Volume

257

Pages

191--207

Subjects

Conservation , Discovery , endangered tree species , Floristic diversity , Geniostoma sect. Labordia , Gentianales , Hawaiian flora , kāmakahala

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia, Bulgaria Pensoft Publishers [2010]-

Identifiers

DOI: https://doi.org/10.3897/phytokeys.257.154236

 

Abstract

A new endemic species of Geniostoma from Kaua‘i, Hawaiian Islands, is described and illustrated with notes on its distribution, ecology, conservation status, and relationships to other members of the genus. A modification to the existing key for Hawaiian Geniostoma is provided along with a key to all Kaua‘i species. Geniostoma imadaesp. nov., differs from its Hawaiian congeners by its unique combination of glabrous stems, leaves and stipules, flowers 3–10 in open, paniculate cymes with peduncles up to 75 mm long, corolla salverform, lobes 9–11 mm long, calyx lobes 5–9 mm long, and capsules 2-valved with beak 2–4 mm long. Population estimates range from 800 to 1250 individuals distributed across the central northern and eastern windward ridges, slopes and valleys of Kaua‘i. Geniostoma imadae represents a new Vulnerable (VU) single-island endemic species.