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Title: Monograph of Trematolobelia (Lobeliaceae). Hawaiian Plant Studies107 
Author: St. John, Harold
Date: 1982-10
Publisher: University of Hawai'i Press
Citation: St. John H. 1982. Monograph of Trematolobelia (Lobeliaceae). Hawaiian plant studies 107. Pac Sci 36(4): 483-506.
Abstract: The genus Trematolobelia (Lobeliaceae) is endemic to the
Hawaiian Islands. It resembles Lobelia, except for its peculiar dehiscence. On
ripening the capsules shed their epidermis and soft mesocarp, exposing the outer
bony endocarp which is pierced by numerous holes. On the exposed ridges or cliff
faces, the slender stem is whipped back and forth by the wind. Centrifugal force
ejects the seeds through the holes of the endocarp.
This monograph presents nine species and three varieties of the genus, five on
Hawaii, two on Oahu and Molokai, and one each on Kauai, Lanai, east Maui,
and west Maui. Eight of them are new or are new placements.
ISSN: 0030-8870

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