Monographs Details: Dalea hintonii var. subbijuga 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.
Family:Fabaceae
Description:Species Description - Depressed, mat-forming shrublets, the suffruticose main stems trailing, up to 6-8 dm long, the slender, ascending, mostly monocephalous flowering branchlets little over 1 (1.5) dm long; main cauline leaves (drought-deciduous) up to 2 cm long, the 5-9 elliptic-oblanceolate leaflets mostly 3-6.5 mm long, the upper leaves (1) 3-5- foliolate; calyx 4.8-5.9 mm long. — Collections: 1 (o).

Distribution and Ecology - Open pine-forest, ± 1500 m, known only from Mina district in Sierra Madre del Sur, Guerrero. — Flowering January to March.

Latin Diagnosis - Dalea hintoni Sandw. var. subbijuga (with ± 2 pairs of leaflets) Barneby, var. nov., a var. hintoni foliolis minus numerosis, foliorum caulinorum majorum 2-4 (saepissime 2 et 3)-jugis, summorum tantum 1-2-jugis recedens. - Guerrero. Mina distr.: Petlacala to El Oro, Cruz-Quemada, Sierra Madre del Sur, January 13, 1939, Ynez Mexia 9103.

Discussion:

(Plate CVIII)

 

Apart from the reduced number of leaflets, which must be regarded as its chief differential character, var. subbijuga differs from var. hintoni, in the few specimens seen, by its better developed main stems which become distinctly woody and trailing, apparently forming mats 1-1.5 m in diameter. The inflorescence and flowers of the two varieties are virtually identical.

Distribution:El Oro Ecuador South America| Guerrero Mexico North America| Mexico North America| Ecuador South America|

Multimedia: