TITLE

NUEVAS ESPECIES DE VIGUIERA (COMPOSITAE, HELIANTHEAE) DEL ESTADO DE DURANGO, MÉXICO

AUTHOR(S)
González Elizondo, M. Socorro; González Elizondo, Martha; Rzedowski, Jerzy
PUB. DATE
December 2000
SOURCE
Acta Botanica Mexicana;2000, Issue 53, p35
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Viguiera oligantha and V. inegii, from the state of Durango, are described and illustrated. The two new species are endemic to northeastern Durango and occur sympatrically. Both are canescent shrubs. Viguiera oligantha represents an unusual condition in the genus because of its highly reduced heads with 1-2 disc flowers and 0-2 ray flowers, the heads arranged in corymbiform cymes. We consider V. oligantha and V. inegii to be sister species possibly derived from V. greggii (A. Gray) S. F. Blake. They differ from V. greggii in having predominantly alternate leaves with impressed nerves as well as smaller heads and flowers. The new species are related to members of the series Brevifoliae, although it is necessary to reevaluate the circumscription of the series to incorporate these species. A key is presented for the identification of the components of the emended series Brevifoliae and a list of examined specimens of the remaining species of the series is included.
ACCESSION #
20220215

 

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