38 



PLAMT-E WRIGHTIANJE. 



TI. 



D. ALorEcuRoiDES, Llnn. ; Grai/, l c. Hill-sides at the copper mines, New 



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



D. WisLizENi, Grai/, FL Fendl. p.2,2; 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 

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

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

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



D. argyr.5:a, Gray, Pl. Wright. p. 47. On the San Pedro or Devirs River, 

 Westera Texas ; July. 



D, scoPARiA, Gray, Pl. Fendl. p. 32, 8f Pl. Wright. p. 47. Sand-hills near San 

 Elizario, New Mcxico ; June. (1354.) 



D. ALBIPLORA (sp. nov.) : cinereo-pubescens ; caulibus erectis e radice perenni 

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

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

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

 cum bractcis subulatis aequilongis albo-villosis, dentibus subulatis tubo paullo brevi- 

 oribus ; petalis albis sequilongis 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. Leafiets 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 D. alopecuroides or of Petalostemon phleoidcs. 



D. ALBiFLORA ; vai'. humilis ; foliolis spicisque angustioribus. — On mountains 

 near Santa Cruz ; Sept. (988.) 



D, L-EviGATA (sp. uov.) : caulibus e radice crassa perenni pluribus erectis striatis 

 foliisque glabcrrimis Isevibus ; 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 praesertim 

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

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

 Mountains, and on the Barbocomori, Sonora ; Aug., Sept. (989.) — Stems about 2 

 feet high fi om 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 lono-, 

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

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

 long and a qujirtcr of an inch tliick, silky-villous. Bracts deciduous only with thc 

 fruiting calyx, greenish, 2 lincs 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. 



