44 TAVELFTH ANNUAL REPORT. 



A. adsurgeus, Pall.* Milk-Vetch. 

 Red river valley, Scott, Macimii. West. 



A. liypog-lottis, L.j Milk-Yetch. 



Rliiins near Pembina, DoiKjlas, Chlclurbuj, Haranl. Red river prairie. Dmvaon. 

 West. 



A. si'iicilis, Nutt.t Milk- Vetch. 

 Miiuiesota, IVatsoit. Southwest. 



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



Upper Jrississippi river, Uin-risoit; lake Pepin, 3/i.s.s Mannimj. Rare. 



A. flexiiosiis, L)ouol.§ Milk-Vetch. 



Red river prairie, Domjlux, Macuttn, Dnicson, Scott. West. 



OXYTROPIS, DC. OxYTROPis. 



<), Laiuberti, Pursh. Oxytropis. 



Prequeiit or common, westward ; extending east to Worthington (rare) Foote, Cot- 

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

 clianging later to blue), Upham, Douglas county, Mcs. Tec/i/, Fergus Falls, Leonard, 

 and the Red river valley, Doimhtx, Macouii. 



'■■ASTKAcsALUS AUSUBGENS, 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 inlengtli). straight, usually tiiangular-compressed, 

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

 -^■o/^'8 ii'ep. in KiiKfa Expl.of the FortlctJi Po/v(?7('f, following O'/aj/'s Rcvis., Proc. Ainer. 

 Acad., vol. vi. 



tASTKAGALUS Hvi'OGLOTTis, L. Perennial, with a rather loose pubescence, or 

 nearly glabrous ; stems 6 inches to 2 feet long, slender, diffusely 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, li 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 Septembei', Watson's Rep. in Kintj's E.vpl. of Die Fortietii Parallel, follow- 

 ing Gray's Revision. 



; Astragalus gracilis, Nutt. Perennial, somewhat appressed pubescent, slender, 

 erect or ascentling, a foot high or more : leaflets tliree to ttve 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, i-celled, con-jave on the back, 

 and the ventral suture prominent. Watson in liotanij of IVlieclcr's Surveys west of the 

 One Hundredth Meridian. 



§ Astragalus flexuosus, Dougl. Ashy-puberulent ; stems ascending, l foot high, 

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

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

 hoary-pubescent, teetli 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. (Iray's Rrvisi(ni oj Astrath, I'roc. Amer. Acad., vol. vi. 



