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Generic Relationships of Oparanthus and Petrobium, Especially with Reference to Bidens (Compositae, Heliantheae, Coreopsidinae)
Tod F. Stuessy
Vol. 40, No. 2, Winona H. Welch Festschrift (Apr. - Jun., 1988), pp. 195-199
Stable URL: http://www.jstor.org/stable/2807004
Page Count: 5
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Oparanthus with two species from the Tubuai Islands of the South Pacific Ocean and the monotypic Petrobium from St. Helena in the South Atlantic are judged to belong more properly within Bidens. Comparisons of diagnostic morphological features are provided, and the necessary combinations are made, including Bidens rapensis (F. Brown) Stuessy and B. tubuaiensis (F. Brown) Stuessy.
Brittonia © 1988 New York Botanical Garden Press