The reproductive biology and effective pollinators of the endangered beardtonguePenstemon penlandii (Scrophulariaceae)


Penland's beardtongue, a rare endemic plant of the Colorado Plateau, displays a mixed breeding system. Plants are partially self-compatible but set more fruits when cross-pollinated than when self-pollinated. Fruit production is significantly increased by pollinators. However, in two years of study there was no indication that fruit set was being limited by… (More)
DOI: 10.1007/BF01090298


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