Hummingbird-Syndrome Traits, Breeding System, and Pollinator Effectiveness in Two Syntopic Penstemon Species.

@article{Lange2000HummingbirdSyndromeTB,
  title={Hummingbird-Syndrome Traits, Breeding System, and Pollinator Effectiveness in Two Syntopic Penstemon Species.},
  author={R{\"u}diger Lange and Scobell and Shirley L. Scott},
  journal={International journal of plant sciences},
  year={2000},
  volume={161 2},
  pages={
          253-263
        }
}
Red-flowered, tubular Penstemon barbatus and Penstemon pinifolius, which have probably adapted independently to hummingbird pollinators, coflower on recently burned high-elevation slopes in the Chiricahua Mountains in Arizona. Hummingbirds visit both species but visit P. barbatus at a higher rate. We compared several traits and asked whether the species differed in specialization for hummingbird pollination. The corollas of P. pinifolius were 30% narrower than those of P. barbatus, but they… CONTINUE READING
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