Dalea weberbaueri var. weberbaueri
Rupert C. Barneby
82a. Dalea weberbaueri Ulbrich var. weberbaueri
(Plate LXXXII)
Foliage silvery when young, sometimes greenish in age; leaflets mostly small, 2-6 mm long; spikes usually becoming loose in age or at full anthesis, a few flowers toward base separated by the width of a calyx; flowers large, the keel-blades 6.3-7.3 mm long, 3.4-4.1 mm wide. — Collections: 14 (o).
Stony clay hillsides and thinly wooded or brushy canyon walls, 2100-3600 m, apparently not uncommon locally, both slopes of the Peruvian Andes from Cajamarca (prov. Celendin and Cajamarca) s. through La Libertad and Ancash and on the Atlantic slope in Junin and n. Huancavelica. — Flowering October to June, probably later.—Representative: Cajamarca. Celendin: Ferreyra 15,024 (F, US). Cajamarca: D. & V. Ugent 5510 (NY). La Libertad. Santiago de Chuco: Lopez Miranda 0987 (US). Ancash. Huaraz: Sandeman 4642 (K, OXF). Bolognesi: Ferreyra 5723, 5726, 7552, 7573 (US). Junin. Tarma: Killip & Smith 21,826, 21,937 (F, NY, US). Huan- cavelica. Huancavelica: Tovar 305 (US).
Dalea weberbaueri (August Weberbauer, 1871-1948) Ulbr., Feddes Repert. 2: 9. 1906. — "Peruvia: inter Tarma et Palea in petrosis 2600-3000 m. s. m. (A. Weberbauer, Flora von Peru no. 1739 — leg. spec, florif. et fructif. 26. XI. 1902). Prope Tarma in departi- mento Junin in declivibus petroso-argillosis 3000-3300 m. s. m. specim. florif. leg. A. Weberbauer 9 Februario 1903 sub no. 2371." —Holotypus (Weberbauer 1739), formerly B, survives as Field Neg. 738, F, NY, US! — Parosela weberbaueri (Ulbr.) Macbr., Field Mus., Bot. 4: 105. 1927.
The approximate topotypes collected by Killip & Smith serve, since destruction of the original gatherings described by Ulbrich, as standards for comparison. In the southern, transmontane lobe of its range, var. weberbaueri is distinguished from all compatriot da- leas, except D. fieldii (discussed under var. sericophylla below), by its gray-silky foliage. The whole range of the variety is nearly conterminous with that of D. cylindrica var. haenkeana; the flowers and foliage are much alike in form, and it is possible that the two taxa as defined herein are based on an artificial separation of glabrate and silky populations of one specific type. On the Pacific slope, where var. weberbaueri occurs within the range of D. cylindrica, it is usually distinguished without difficulty by the more condensed habit of growth, smaller leaves and leaflets, and silky vesture not only of the leaves but of the calyx. The specimen cited from La Libertad is, however, somewhat intermediate, having the growth and calyx-vesture of var. weberbaueri combined with glabrous leaflets. Here again the picture is clouded and the evidence available inconclusive.
References: [Article] 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.Multimedia:
