38 FLANTJ3 WRIGHTIANJE. TI. 



D. ALOPEcuRoiDES, Limi. ; Grai/, I. c. Hill- sides at the copper mines, New 

 Mexico ; and on the borders of Sonora. (985.) 



D. WisLiZENi, Gray, PI. Fendl. j). 32; var. foliolis minus sericeis obtusis supra 

 glabellis subtus tantum cinereo-pilosis (caulibus frutescentibus e basi ramosis). — 

 Mountain ravines near Santa Cruz, Sonora, Sept. (986,) — Except in the points 

 mentioned, the specimens accord with D. Wislizeni, They have the same gland-like 

 setulae on the calyx-lobes, and the solitary gland near the tip of the petals, the 

 wings excepted. The corolla is bright rose-purple in the specimens. The stems 

 are woody towards the base, erect or ascending, 2 or 3 feet higli. Stipules subulate. 



D. ARGYR.EA, Gray, PI. Wright, p. 47. On the San Pedro or Devil's River, 

 Western Texas ; July. 



D. scoPARiA, Gray, PL Fendl. p. 32, Sf PI. Wright, p. 47. Sand-hills near San 

 Elizario, New Mexico ; June. (1354.) 



D. ALBiFLORA (sp. uov.) : ciuereo-pubescens ; caulibus erectis e radice perenni 

 vix glandulosis ; foliis juventis sericeo-canescentibus ; foliolis 10-15-jugis cum 

 impari oblongis obtusis supra glabellis subtus parce glanduloso-punctatis ; petiolo 

 communi brevissimo ; stipulis minimis subulatis ; spicis cylindricis densis ; calycibus 

 cum bracteis subulatis sequilongis albo-villosis, dentibus subulatis tubo paullo brevi- 

 oribus ; petalis albis a^quilongis subconformibus. — Hill-sides on the San Pedro and 

 Barbocomori, Sonora ; Sept. (987.) — Stems one or two feet high, simple, or spar- 

 ingly branched above. Leaves 1-2 inches long. Leaflets crowded, 2 or 3 lines 

 long, more or less pubescent beneath with very fine silky hairs. Spikes silvery- 

 canescent before the flowers expand, one or two inches long, very dense. Bracts 

 caducous. Flowers 3 lines long ; the lamina of the pure white petals a line and a 

 half long, of the vexillum round-oval, of the other petals oval-oblong. Anthers 

 yellow, tipped with a gland. Ovary and base of the style villous. — The plant has 

 somewhat the general aspect of U. alopecuroides or of Petalostemon phleoides. 



D. ALBiFLOKA ; var. humilis ; foliolis spicisque angustioribus. — On mountains 

 near Santa Cruz ; Sept. (988.) 



D. LAEVIGATA (sp. uov.) I cauUbus e radice crassa perenni pluribus erectis striatis 

 foliisque glaberrimis Itevibus ; foliolis 17 — 20-jugis cum impari lineari-oblongis 

 subacutis canaliculatis (sesquilineam longis) subtus parce punctatis ; spicis cylin- 

 draceis densis ; bracteis ovatis acuminatissimis parce glandulosis margine pra^sertim 

 arachnoideo-villosis florem subsequantibus ; calyce villosissimo, dentibus triangulari- 

 subulatis tubo brevioribus ; petalis pallide flavis subiequilongis. — On the Chiricahui 

 Mountains, and on the Barbocomori, Sonora; Aug., Sept. (98!).) — Stems about 2 

 feet high fiom a lignescent root, rather strict and slender, more or less branched 

 above, sharply striate-angled, perfectly glabrous and smooth, leafy ; the branches 

 sparingly if at all punctate. Stipules minute, subulate. Leaves 1 to 2 inches long, 

 pale green. Leaflets thickish, veinless except the obscure midrib, perfectly glabrous 

 as well as the rhachis, and sparingly punctate underneath. Spikes about an inch 

 long and a quarter of an inch thick, silky-villous. Bracts deciduous only with the 

 fruiting calyx, greenish, 2 lines long. Corolla small ; the lamina of the petals a 

 line and a half long ; vexillum orbicular ; the others oblong. Ovary and base of 

 the style silky-villous. 



