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The Anatomy of Barbaceniopsis, a New Genus Recently Described in the Velloziaceae

Edward S. Ayensu
American Journal of Botany
Vol. 55, No. 4 (Apr., 1968), pp. 399-405
Stable URL: http://www.jstor.org/stable/2440569
Page Count: 7
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The Anatomy of Barbaceniopsis, a New Genus Recently Described in the Velloziaceae
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Abstract

Although the two species in Barbaceniopsis-B. boliviensis and B. vargasiana-have in common many features which support their inclusion in one genus, there are also obvious differences in the depth of leaf furrows, absence of hairs in B. vargasiana, and type of girder sclerenchyma in the leaf. The presence of vessels in the leaf has been demonstrated. The frequent observation that the roots cling tightly only to stems of Vellozia species is shown to be characteristic of the family. A comparison of the three genera clearly indicates that there are obvious anatomical characters which help to distinguish Barbaceniopsis and Barbacenia from Vellozia. Although it is not suggested that Barbaceniopsis be reduced to synonymy, there can be no doubt that it is very closely associated with Barbacenia.

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