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Primitive Forest Grasses and Evolution of the Bambusoideae
Thomas R. Soderstrom and Cleofé E. Calderón
Vol. 6, No. 3 (Sep., 1974), pp. 141-153
Published by: Association for Tropical Biology and Conservation
Stable URL: http://www.jstor.org/stable/2989646
Page Count: 13
You can always find the topics here!Topics: Spikelets, Grasses, Inflorescences, Stems, Plants, Stamens, Biological taxonomies, Bamboos, Gynoecium, Genera
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Eastern Brazil, particularly the region around Bahia, harbors many primitive herbaceous bambusoid grasses. In the tribe Olyreae, the genus Piresia is represented by several new species, all less advanced than those of Amazonia. The species of Diandrolyra found in Bahia show more primitive features than those which occur to the south. The tribe Parianeae, previously known only by the genus Pariana, which occurs throughout Amazonia, is represented by two new genera from eastern Brazil. At least one of these exhibits the most primitive features in the tribe. These preliminary findings suggest that the Bahian region is a refugium of at least some primitive herbaceous bambusoid grasses, and that migration proceeded from here southward along the Serra do Mar and northwestward into Amazonia.
Biotropica © 1974 Association for Tropical Biology and Conservation