Monographs Details: Dalea pinetorum var. anilantha Barneby
Authors:Rupert C. Barneby
Authority: Barneby, Rupert C. 1977. Daleae Imagines, an illustrated revision of Errazurizia Philippi, Psorothamnus Rydberg, Marine Liebmann, and Dalea Lucanus emen. Barneby, including all species of Leguminosae tribe Amorpheae Borissova ever referred to Dalea. Mem. New York Bot. Gard. 27: 1-892.
Description:Species Description - Characters as given in key; calyx 5.6-6.8 mm long, the tube ± 2 mm, the dorsal tooth 3.5-4.8 mm long, plumose with hairs 0.8-1.2 mm long. — Collections: 1 (typus).
Distribution and Ecology - Open pine-oak woods, ± 2010 m (6700 ft), known only from Sierra Chinatu, near the source of Rio Verde in Sierra Madre Occidental, extreme s.-w. Chihuahua.— Flowering September-November.
Latin Diagnosis - Dalea pinetorum Gentry var. anilantha (with indigo-blue flowers) Barneby, var. nov., a var. pinetorum foliolis minus numerosis 7-10 nec 10-19-jugis obtusis vel emarginatis nec acutis, calyce ab imo basi piloso (nec tubo glabrato), petalisque concoloribus saturate coeruleis nec bicoloribus (vexillo pallido, interioribus purpureis) recedens. — Chihuahua: near Chinatu, in open pine.oak woods on Sierra Chinatu, 6700 ft., October 9, 1959, D. S. Correll & H. S. Gentry 22,969.
Many species of Dalea are highly variable in characters of pubescence and flower- color; a few vary a good deal in number of leaflets. The low taxonomic value of the characters is only perceived, however, in the context of long sets of specimens or, occasionally, in polymorphic single populations. It is statistically improbable that several such characters should be found grouped, as in the varieties of D. pinetorum, within the confines of the first two populations discovered, and for this reason I feel justified in describing var. anilantha as distinct. Few leaflets, obtuse leaflets, pubescent calyx-tube, blue flowers, each might be expected in a given collection, but hardly all together. The highly dissected topography of the Sierra Madre undoubtedly encourages or at least permits the development of genetically distinct races within the species, and I feel confident that var. anilantha is one of these.
Chihuahua Mexico North America
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