[Next]  [Previous]   [Floral Formula]  [Lecture Text]

Breeding Systems

 23-Distyly

[FMP-field: image]
Heterostyly — The flower on the left is a thrum, the one on the right is a pin

  • Pin plants always set more seed, perhaps because the stigmas are exposed.
  • Heterostyly is less efficient than other types of self-incompatibility because each plant can only fertilize half the population.
Photo by K. R. Robertson of plants from Loda Cemetery Prairie Nature Preserve, Iroquois County, Illinois.
[Next]  [Previous]   [Floral Formula]  [Lecture Text]