44 TWELFTH ANNUAL REPORT. 



A. adsurg-ens. Pall.* Milk-Vetcb. 

 Keil river valley, Scott, Uacnun. West. 



A. liyiK)glotti.s, L.f Milk-Yetch. 



Plains near Pembina, Douylas, Chiclariiiii, Havcod. Red river prairie, Dawxoii. 

 West. 



A, si'acilis, Nutt.J Milk- Vetch. 

 Jliunesota, Watson. Southwest. 



A. Cooperi, Gray. Cooper's Milk-Vetch. 



Upper Mississippi river, Garrisoit; lake Pepin, MiS)^ Mannintj. Rare. 



A. fiexuo.su.s, Douol.§ Milk-Vetch. 



Red river prairie, Douyla><, Macvitii, Dawson, Scott. West. 



OXYTKOPIS, DC. OxYTROPis. 



O, Laiuberti, Pursh. Oxytropis. 



Frequent or common, westward ; extending east to Wortliington (rare) Foote, Cot- 

 tonwood county, Holzinyer, Glenwood (common, with flowers bright rose-purple, 

 clianging later to blue), Uphain, Douglas county, iVfrs. Tecrj/, Fergus Falls, Leonarcl, 

 and the Red river valley, Doimlas, Macoun. 



*ASTRA<',ALUS AusuRGENS, Pall. Perennial, cinereous with minute appressed 

 pubescence or glabrate ; stems rather stout, 4 to 18 inches high, ascending or decum- 

 bent ; stipules scarious, mostly united at base ; leaflets 10 pairs, 6 to 9 lines long, nar- 

 rowly or linear-oblong ; spike dense, at length oblong or cylindrical ; flowers purplish, 

 medium sized, ascending ; calyx-tube rather long-campanulate, twice exceeding the 

 setaceous teeth, subvillous with light or dark hairs ; pod coriaceous, pubescent, sessile, 

 ascending, ovate-oblong (4 to 5 lines in length), straight, usually tiiangular-compressed, 

 with a dorsal sulcus, and 2-celled by the intruded dorsal suture, many-ovuled. Wat- 

 son's I>ei>. in Kinij't' Expl. of tlie Fortieth Pa/((7ir/, following (iiay'ts Rcvis., Proc. Amer. 

 Acad., vol. vi. 



lASTKAGALUs H vfOCLOTTis, L. Perennial, with a rather loose pubescence, or 

 nearly glabrous ; stems 6 inches to 2 feet long, slender, ditlusely procumbent or ascend- 

 ing ; stipules subfoliaceous and more or less sheathing ; leaflets 7 to 10 pairs, oblong, 

 obtuse or retuse ; heads rather many-flowered ; corolla violet, Vt inch long ; legume 

 coriaceous, ovate and triangular, silky-villous, very shortly .stipitate, 2-celled by the 

 intruded dorsal suture, and but 6- to 8-seeded. From southern Colorado northward 

 along the Rocky Mountains and Red River Vallev to the Arctic Circle and Alaska. 

 June to September, T^o^so/l's Rep. in Kiiuj's E.vpl. of the Fortieth PoraUel, follow- 

 ing Gray'f RevUinn. 



^ASTRAGALUS (SRACiLis, Nutt. Perennial, somewlial apprcsscd pubescent, slender, 

 erect or ascending, a loot high or more : leaflets three to live pairs, narrowly linear, 

 half an inch long or less : flowers very small, white or purplish, in an elongated open 

 long-peduncled spike : calyx-teeth very short : pods coriaceous, sessile, pubescent and 

 rugose, 2 or 3 lines long, ovate-oblong and obcompressed, 1-celled, concave on the back, 

 and the ventral suture prominent. Wotson in Bot<tii!/ of Wheekr's Siirvfys west o1 t)i€ 

 Oni Hundredth Meridimi. 



gASTRAGALUs FLF.xuosus, Dougl. Ashy-pubcrulent ; stems ascending, l foot high, 

 flexuose ; leaflets oblong or cuueate-linear, obtuse or retuse ; peduncles exceeding the 

 leaves ; racemes mostly elongated, loose ; flowers 4 lines long, white or purplish ; calyx 

 hoary-pubescent, teetu three times shorter than the tube , pod cylindric, 8 to U lines 

 long. 2 lines broad, puberulent. thinly coriaceous, straight or sub-incurved ; stipe very 

 short, out evident. (Jraij's Revision of Astrag., Jt^oc. Amer. Acctd., vol. vi. 



