VIOLA CALCICOLA (VIOLACEAE), A NEW ENDEMIC VIOLET FROM THE GUADALUPE MOUNTAINS OF NEW MEXICO AND TEXAS

摘要

Viola caldcóla is described as growing in limestone located within protected springs and valleys of the Guadalupe Mountains in New Mexico and Texas. This violet is most similar macromorphologically and ecologically to V egghstonii of east-central U.S. limestone cedar glades and micromorphologically to V. septemloba of southern Atlantic and Gulf Coast sand pine savannas. However, it diverges from all known heterophyllous-leaved taxa of Viola subsection Boreali-Americanae in many vegetative and reproductive features. It is removed by hundreds of kilometers from other putatively related heterophyllous-leaved violets, being the first record of lobed-leaved members of the subsection in the western U.S. and the second species of Viola found to be endemicto the Guadalupe Mountain region.