Notes on Southwestern Plants
1929; Missouri Botanical Garden; Volume: 16; Issue: 4 Linguagem: Inglês
10.2307/2394010
ISSN2162-4372
Autores Tópico(s)Plant Diversity and Evolution
ResumoIn a collection of plants made in Oklahoma by Robert Stratton was a specimen of Gaura which could not be placed in any species known to occur in that state. After a critical survey of the genus and a comparison with type material it was found to be conspecific with G. suffulta Engelm.1 This species has been known previously only from southern Texas, and its distribution as given by Small2 is On prairies or mountain slopes, Texas and northern Mexico, and by Coulter3 From the Colorado to the Lower Rio Grande, west to the Pecos and New Mexico. The accompanying map (fig. 1) shows the range of distribution of the species as represented in the Herbarium of the Missouri Botanical Garden, and gives the northern extension of the range as indicated by the Stratton specimen from the Arbuckle Mountains of southern Oklahoma, the Emig collections from the same region, and the Palmer and Glatfelter collections from Fort Worth and Dallas. This species as described by Engelmann is quite distinct in its characters but has been poorly defined in subsequent works. Consequently a great amount of southwestern material of the genus Gaura has been erroneously referred to G. suffulta. The work of Wooton and Standley4 in 1913 in segregating several new species from this complex has partially reinstated the species to the status originally given it by Engelmann. Its outstanding characteristics are a sessile, glabrous, oblong fruit somewhat constricted toward the apex, glabrous buds and caducous bracts prominently ciliate on the margins. The following material in
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