Dalea eriophylla var. eriophylla
Rupert C. Barneby
122a. Dalea eriophylla Watson var. eriophylla
(Plate CX)
Leaflets broadly oblanceolate to obovate, mostly 1-4, rarely 6 mm long, villosulous both sides, the whole plant appearing softly white- or gray-tomentellous. — Collections: 11 (i).
Barren flats and low hills, ascending into pine-pinyon forest, 1650-2800 m (5500-9300 ft), sometimes (perhaps often) on gypsum, local but forming colonies, known only from the arid inner valleys of Sierra Madre Oriental and adjoining basin ranges toward the e. margin of the Meseta Central in s.-e. Coahuila (Sierras de Parras and Pata Galana e. into mpo Arteaga), s.-w. Nuevo Leon (mpo Galeana), and n. San Luis Potosi (mpos Guadalcazar and Catorce); to be expected in n. Zacatecas. — Flowering March to April, July to December. —Material: Coahuila. Parras: Parras, Kenoyer & Crum 3230 (GH); Sa. de Parras, Shreve & Tinkham 9869 (ARIZ), M. C. Johnston et al. 10,993, 10,994 (NY); Sa. Pata Galana, Purpus 1064 (F, NY, UC). Arteaga: typus. Nuevo Leon. Galeana: 9 mi w. of Galeana, Ripley & Barneby 13,791 (CAS, GH, K, MEXU, MICH, NY, US); 22 mi n.-w. of Ascension, Shreve & Tinkham 9737 (GH, sterile). San Luis Potosi. Guadalcazar: e. of Santa Ana Pozos, Rzedowski 636 (ENCB, MICH, TEX); km 112, San Luis — Antiguo Morelos hwy, Rzedowski 6475 (ENCB, MEXU, MICH). Catorce: e. of Est. Maroma, Rzedowski 8167 (ENCB, MICH).
Dalea eriophylla (woolly-leaved) Wats., Proc. Amer. Acad. Sci. 17: 340. 1882.— "In the Sierra Madre, forty miles south [probably e.-s.-e.] of Saltillo (211)..." —Holotypus, Palmer 211 in 1880, from vicinity of San Antonio de Alanzanes, mpo Arteaga, Coahuila (cf. McVaugh, 1956, p. 320), GH! isotypi, F, NY, P, US! — Parosela eriophylla (Wats.) Rose, Contrib. U. S. Nat. Herb. 10: 106. 1906.
The plant collected by Shreve and Tinkham northwest of Ascension, described as forming large clumps in a mountain park at 7500 ft, is more thinly pubescent than other material of D. eriophylla, although the vesture is of the same finely woolly consistency. Its leaflets are also narrower and a trifle longer than usual. I. Johnston annotated the sheet at GH (which has no flowers) as an undescribed species akin to D. eriophylla, but it seems more likely to represent only a luxuriant phase. As elsewhere in var. eriophylla the bracts and stipules are glabrous within and the thin pubescence cannot in any sense be thought of as transitional to the following.
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:
