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Notes on the Biology of Obolaria virginica (Gentianaceae) in Southeast Missouri, and the Effects of Leaf Litter on Emergence and Flower Production

Diane L. Wood and Allan J. Bornstein
Castanea
Vol. 76, No. 2 (June 2011), pp. 157-163
Published by: Allen Press on behalf of the Southern Appalachian Botanical Society
Stable URL: http://www.jstor.org/stable/41301483
Page Count: 7
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Notes on the Biology of Obolaria virginica (Gentianaceae) in Southeast Missouri, and the Effects of Leaf Litter on Emergence and Flower Production
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Abstract

This study investigated several ecological parameters for populations of Obolaria virginica in southeast Missouri where it is listed as endangered. Investigations during the 2006 and 2007 growing seasons included population size estimates and dispersal patterns. A secondary investigation during the 2007 season quantitatively assessed the impact of leaf litter on O. virginica flower production. Obolaria virginica reflected the pattern of a spring ephemeral with emergence as early as mid-February and senescence by early June. Plants grew to an average of 9.2 cm in height and had 14 flowers per individual in each season. Population size estimates ranged from 833-7,820 individuals, with a distinctly clumped distribution pattern. Leaf litter depth appears to negatively affect emergence and flower production in this perennial forest herb.

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