Lysimachia barcae (Primulaceae), a new endemic shrub from Wainiha, Kaua‘i, Hawaiian Islands

By

Wood, Kenneth Richard, 1953-
Wagner, Warren Lambert
Fawcett, Susan
Heintzman, Scott

Type

Article

Date of Publication

2025-10-21

Original Publication

PhytoKeys

Volume

265

Pages

105--121

Subjects

Discovery , Endangered species , Hawaiian flora , plant extinction prevention , Primrose family , single-island endemism

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia, Bulgaria Pensoft Publishers [2010]-

Identifiers

DOI: https://doi.org/10.3897/phytokeys.265.169710

 

Abstract

A new endemic species of Lysimachia from Kaua‘i, Hawaiian Islands, is described and illustrated with notes on its distribution, ecology, conservation status and phylogenetic relationships. A modification to the existing key for Hawaiian Lysimachia is provided. Lysimachia barcaesp. nov., differs from its Hawaiian congeners by its unique combination of mature stems villous to tomentose, petioles 1–3 mm long, leaves ovate, cordate to subcordate or rounded at base, with primary and secondary veins conspicuous, purple-red, raised on abaxial surface, often densely hirsute to pilose and pedicels 35–70 mm long. Only ten mature individuals are known from a single colony along steep, precipitous slopes of Wainiha Valley, Kaua‘i. Lysimachia barcae represents a new Critically Endangered (CR) single-island endemic species and is the focus of concerted conservation efforts to prevent its extinction.