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A New Species of Ipomoea (Convolvulaceae) from Mexico State, Mexico, and Its Evolution
Vol. 50, No. 1 (1995), pp. 93-102
Stable URL: http://www.jstor.org/stable/4114611
Page Count: 10
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A new species, Ipomoea temascaltepecensis, is described from Mexico State, Mexico. It is closely related to I. ampullacea Fernald, with which it shares a woody, climbing habit, trilocular ovaries, tough, ovate, subherbaceous sepal bases, foliaceous bracts and an externally pubescent corolla. The new species is distinguished by shorter (15-28 mm long) sepals, an infundibular purple corolla, and shorter, included, heteromorphic stamens. The probable sister-taxon status of the new species to the moth-pollinated I. ampullacea is discussed in terms of the morphological differences between them, including pollen grain morphology. The role of pollination biology in speciation in Ipomoea is also considered.
Kew Bulletin © 1995 Royal Botanic Gardens, Kew