ASTRAGALUS. LEGUMINOS^. 145 



or ovate, straight, usually more or less compressed or obcom- 

 pressed-triangular, dorsally sulcata 2-cellj.l. pubescent, many- 

 ovuled, erect : stipules more or less sheathing : flowers in dense 

 spikes or small heads : perennials. 



A. adsurgens Pall. Astrag. 40. Cinereous with minute appressed 

 pubescence or glabrate : stems rather stout, :4-18 inches high, ascending or 

 decumbent: leaflets 13-19, narrowly to linear -oblong, 10-12 lines long, ob- 

 tuse, pale green : peduncles longer than the leaves; flowers erect, in ob- 

 long to subglobose spikes ; tube of the calyx long-campanulate, twice as long 

 as the setaceous teeth, subvillous with partly black hairs; petals bright 

 purple, the upper one about one-third longer than the others : pods coria- 

 ceous, erect, sessile, ovate-oblong, 4-5 lines long, straight, usually tri- 

 angular compressed, dorsally sulcate, pubescent with appressed hairs, 

 many-ovuled. Plains of eastern Oregon to Brit. Columbia and western 

 Kansas. 



A. hypoglottis L. Mant. ii, 274. Somewhat hirsute : stems 6-24 inches 

 long, slender, diffusely procumbent or ascending: leaflets 15-21, oblong or 

 obovate to elliptical, obtuse or retuse ; stipules lanceolate, more or less co- 

 hering: peduncles longer than the leaves; bracts longer than the calj'x, 

 lanceolate : calyx blackish-pilose, its subulate teeth as long as the tube 

 petals bright purple : pods ovate, triangular, compressed, silky-villous, 

 very shortly stipitate, 6-8-seeded. Alluvial plains, southeastern Oregon 

 and Washington to Colorado and Hudson Bay. 



§ 5. DiDYMOCARPi Gray 1. c. 18§. Pods thin-coriaceous, ob- 

 compressed-didymous with a narrow perfect septum, transversely 

 ridged or reticulated, at length separating into two 1-2-seeded 

 divisions, mostly deflexed ; ovary short- stipitate : caulescent an- 

 nuals. 



A. Catalinensis Nutt. PI. Gamb. 152. A. nigrescens Nutt. not Pall. Cin- 

 ereous with a short appressed pubescence : stem annual, 2-6 inches high , 

 branching from the base : stipules scarious, triangular-ovate, acuminate, 

 distinct, nearly free ; leaflets 7-11, cuneate-oblong, obtuse or retuse, a line 

 long, pubescent beneath, sometimes smooth above; peduncles longer than 

 the leaves ; flowers 4-8, in a subcapitate raceme, on very short spreading 

 pedicels, soon deflexed, a line long ; calyx campanulate, pubescent with 

 dark colored hairs, the broadly subulate "teeth twice longer than the tube : 

 pods broadly ovate, obcompressed, pubescent, 2-celled by the intrusion of 

 the dorsal suture, the ventral suture obtuse, several-ovuled. On dry hill- 

 sides and banks, both sides of the Siskiyou Mountains near Ashland, 

 Oregon. 



§ 6. MicRANTHi Gray 1. c. Pod coriaceous, oblong, lanceo- 

 late, or linear, straight or curved, sessile, dorsally sulcate, the 

 ventral suture rather prominent, 2-cellod, many-ovuled. 



A. drepanolobus Gray 1. c. xix, 75. Perennial : strigose-pubescent 

 throughout; the numerous stems ascending or decumbent, diffusely 

 branched, 6-12 inches long: leaflets 9-11, obovate, usually emarginate, 

 4-6 lines long : peduncles exceeding the leaves, rather loosely-flowered; 

 calyx short-campanulate, its subulate teeth shorter than the tube : pod 

 linear-oblong, comprepsed, very falcate, 2-celled by the intrusion of the 

 dorsal suture, many-ovuled. On gravelly bars of the John Day river near 

 its junction with the Columbia. 



A. umbraticus Sheld. 1. c. A. sylvaticus Watson, not Willd. Gla- 

 brous: stems numerous from a stout perennial root, ascending or erect, 

 12-18 inches high, branching : leaflets 17-21, oblong, retuse, 4-9 lines long : 

 peduncles equalling or exceeding the leaves.; racemes close, rather few- 



