Abstract
1. A paper chromatographic analysis of root extracts from individuals with different genotypes for flower color in Collinsia heterophylla and C. tinctoria, from small populations belonging to an additional thirteen species in the genus, and from small populations of six interspecific hybrids or their progeny yielded a total of thirteen spots detected by ultraviolet light. 2. Chromatograms did not provide an acceptable basis for separating taxa or for clarifying the status or relation of taxa.
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