Hybridization in a Population of Quercus marilandica and Quercus ilicifolia
Stebbins GL, Matzke EB, Epling C. 1947. Hybridization in a Population of Quercus marilandica and Quercus ilicifolia. Evolution. 1(1/2):79-88
Population samples of Quercus marilandica and Quercus ilicofolia, gathered at Lakehurst, New Jersey, were compared with herbarium sheets of these two species collected for the most part outside the region of their geographical and ecological overlap. The following characters especially were studied: leaf width, number of veins on lower part of leaf, character of leaf base, pubescence of under surface of leaves, length of mature terminal buds of adult twigs, and depth of acorn cups. Hybrid indices were compute; the Cliffwood material had the same general range of scores as the standard of Q. marilandica; in the Lakehurst population approximately 37 percent of the individuals collected were Q. marilandica, approximately 28 per cent were Q. ilicifolia, and the remainder showed varying degrees of intermediacy, the gene flow in this particular sampling being predominantly from Q. ilicifolia into Q. marilandica.
- Type
- Journal Article
- Authors
- Stebbins, G.; Matzke, E.; Epling, C.
- Units
- PINE
- Keywords
- bear oak (Quercus ilicifolia), blackjach oak (Quercus marilandica), Hybridization, Plant Studies, Research Article