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A New Dicerandra (Labiatae) from the Lake Wales Ridge of Florida, with a Cladistic Analysis and Discussion of Endemism

Robin B. Huck, Walter S. Judd, W. Mark Whitten, James D. Skean, Jr., Richard P. Wunderlin and Kris R. Delaney
Systematic Botany
Vol. 14, No. 2 (Apr. - Jun., 1989), pp. 197-213
DOI: 10.2307/2418906
Stable URL: http://www.jstor.org/stable/2418906
Page Count: 17
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A New Dicerandra (Labiatae) from the Lake Wales Ridge of Florida, with a Cladistic Analysis and Discussion of Endemism
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Abstract

Dicerandra christmanii, differing from D. frutescens in anther and corolla color, essential oils, average leaf length, and anther connective glandularity, is described from sclerophyllous oak-sand pine scrub on yellow, well drained sandy soils near Sebring, in Highlands County, Florida. Its distinctness and phylogenetic placement are substantiated by phenetic analysis of morphological features, field study of variability in natural populations, survey of leaf essential oils, SEM study of anther micromorphology, preliminary investigation of pollination biology, garden observations, and a revised cladistic analysis of the genus. The discovery of D. christmanii is indicative of the need for additional taxonomic studies involving the highly endemic flora of the Lake Wales Ridge, a region of extensive and continuing habitat destruction due to agricultural and urban development.

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