A north central Texas Baptisia (Fabaceae, Thermopsideae) hybrid complex containing three parents (B. australis, B. sphaerocarpa, and B. bracteata) and the three F1 hybrids is investigated using morphological, spectrophotometric, and isozyme electrophoretic methods. Two of the three hybrids (B. x bushii and B. x bicolor) have been previously named, but the B. australis x B. sphaerocarpa hybrid (B. x variicolor) is here described for the first time. This is the first report of sympatric occurrence of these three Baptisia species and all the possible F1 hybrids. Morphological evidence for introgressive hybridization involving B. australis and B. sphaerocarpa is presented.
|Number of pages||22|
|Journal||SIDA, Contributions to Botany|
|Publication status||Published - 1996|