4-2 PLANT.E WRIGHTIAN^. VI. 



HosACKiA PuRSHiANA, BeiitJi. ; Ton: Sf Gray, Fl. 1. p. 327. Valley of Sonoita 

 Creek, Sonora ; Sept. (998.) 



H. PUBERULA, Benth. PI. Hartw. p. 305; Grot/, PI. Wriffht. p. 50. Hills near 

 the San Pedro, Sonora ; Sept. Also on Rock Creek, towards the head of the 

 Lnnpio; June. (999.) 



H. PUBERULA ; var. nana, diffusa, magis cinerea ; foliolis brevioribus et latioribus. 



— Organ Mountains, northeast of El Paso, xipril; in flower and fruit. (1357.) 

 H. Wrightii (sp. nov.): sericeo-pubescens ; caulibus e radice perenni erectis 



rigidis raraosissimis ; stipulis nigris glaudula-formibus ; petiolo vix ullo ; foliolis 

 3-5 linearibus imisve oblongis ; pedunculis unifloris folio brevioribus, superioribus 

 brevissimis ; bractea unifoliolata lineari ; calycis dentibus setaceo-subulatis tube 

 oblongo-campanulato aquilongis corolla (flava purpureo tincta) multo brevioribus. 



— Stony hills at the copper mines. New Mexico, Aug. (1000.) — Plant about a 

 foot high, herbaceous ; the young branches and foliage silvery-pubescent, when old 

 glabrate. Petioles of the lower leaves barely half a line long ; the upper almost 

 none. Leaflets 5 to 7 lines long, half a line wide, or towards the base of the stem 

 a line and a half wide. Lower peduncles 6 to 8 lines long, the upper one to three lines 

 long, rarely 2-flowered. Calyx minutely silky-pubescent, the tube 2 to 2^ lines 

 long. Corolla 6 lines, long, not counting the included claws. Legume over an 

 inch long, straight, acute, clothed with the same pubescence as the calyx. — Allied 

 to the preceding species ; from which it is distinguished by its more upright and 

 bushy growth, its nearly sessile leaflets, short peduncles, and larger flowers. From 

 H. rigida, Benth., its narrow leaflets, shorter calyx-tube with longer teeth, and short 

 peduncles seem abundantly to distinguish it. 



Astragalus mollissimus, Torr. ; Grai/, PI. Wriffht. p. 5^. Prairies of Escondido 

 Creek, between the Pecos and the Limpio ; June, in fruit. 



A. BiGELovii (sp. nov.): multiceps, acaulescens, undique sericeo-villosissimus ; 

 stipulis triangulari-subulatis basi petioli adnatis ; foliolis 9-12-jugis ovalibus seu 

 obovato-oblongis ; pedunculis scapiformibus folia superantibus, fructiferis recurvis 

 vel humifusis ; spica cylindrica confertiflora ; tubo calycis villosissirai cylindrico 

 dentibus subulatis triplo longiore ; corolla purpurea ; legurainibus ovatis apiculato- 

 acuminatis incurvis lanosissimis complete bilocularibus suturis parum sulcatis, 

 loculis polyspermis. — On the Organ Mountains northeast of El Paso ; April 

 30 til ; chiefly in fruit. (1358.) — Plant a span or more in height from a peren- 

 nial lignescent root ; the leaves, scapes, &c. thickly clothed with a canescent wool, 

 which is rather villous than silky. Leaflets 5 to 8 lines in length. Spike 3 or 4 

 inches long, many-flowered, compact. Flowers nearly sessile, 7-8 lines long. 

 Legumes half an inch long, very densely woolly, as well as the scariously marces- 

 cent calyx, coriaceous, the cross-section orbicular. — Manifestly allied to A. mollis- 

 simus, and with the same habit ; but more strictly acaulescent, more villous, and 

 especially distinguished by its turgid and very woolly (instead of glabrous) pods, 

 the sutures not introflexed. I dedicate it to Dr. J. M. Bigelow, the physician of the 

 Boundary Commission, to whom, with Mr. Wright, we are indebted for the discovery 

 of this striking species. 



