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Chromosome Numbers of Hedeoma (Labiatae) and Related Genera
Chromosome numbers are presented for the first time for 24 species and four varieties of the 42 taxa of Hedeoma. Chromosome numbers are 2n = 36 or based on x 18 for most seections and 2n = 44 forExpand
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Effect of development on monoterpene composition of Hedeoma drummondii
Abstract Samples of leaves, flowers and whole plants were taken from clonal stock of Hedeoma drummondii to determine the effect of developmental age on the monoterpene profile. GLC analysis revealedExpand
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A NEW PARATROPICAL ANGIOSPERM FLORULE IN THE EOCENE ROCKDALE FORMATION OF BASTROP COUNTY, TEXAS
An outcrop of the Eocene Rockdale formation (Wilcox group) at the Elgin Standard Brick Mfg. Co., in Bastrop County, Texas, contains many angio- sperm leaf and fruit impressions. Twenty-seven speciesExpand
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Composition and net primary production of native prairies in eastern Arkansas.
The Grand Prairie region of eastern Arkansas is representative of a series of native prairies that developed on terrace deposits in the lower Mississippi River Valley. Today almost all of the fewExpand
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Hybridization and evolution in Picradeniopsis (Compositae)
The predominantly allopatric species of the genusPicradeniopsis, P. oppositifolia andP. woodhousei, are distinct in morphological, in phenolic and terpeniod chemical, and in cytological aspects (n =Expand
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Artificial Hybridization in Hedeoma (Labiatae)
Thirteen species of Hedeoma, representing three subgenera, and one species of Poliomintha were artificially crossed to attempt 52 hybrid combinations. Crossability was generally high, and 83% of theExpand
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