The genetic structure of a columnar cactus with a disjunct distribution: Stenocereus gummosus in the Sonoran desert

@article{ClarkTapia2003TheGS,
  title={The genetic structure of a columnar cactus with a disjunct distribution: Stenocereus gummosus in the Sonoran desert},
  author={Ricardo Clark-Tapia and FRANCISCO E. MOLINA-FREANER},
  journal={Heredity},
  year={2003},
  volume={90},
  pages={443-450}
}
Stenocereus gummosus is a columnar cactus endemic to the Sonoran desert that exhibits a disjunct distribution: it is widely distributed in Baja California and restricted to a small coastal area in mainland Sonora. In this paper, we examine the genetic structure and the mating system of this species in order to explore the origin of the disjunction and describe aspects of the pollination biology. Flowers are nocturnal, pollinated mainly by sphingids and self-incompatible. Polymorphism for… CONTINUE READING