144 LEGUMINO^:. ASTRAGALUS. 



pods falcate, some what revflexed, linear, compressed, somewhat diaphanous; 

 nearly glabrous, 2-celled, many-seeded. Handy soil, near the Great Falls 

 of the Oregon (Douglas). 



A. aeeidens Watson I.e. Sparingly pubescent ; the numerous stems 



0-18 inches long, from a thick perennial root: leaflets i()-lo. pairs., oblong, 

 retuse, cuneate at base, glabrous above, appressed pubescent beneath, 

 6-8 lines long : peduncles about equalling the leaves: flowers reftVxed, in 

 a short raceme; calyx campanulate, dark-pubescent. 3 lines long, the 

 teeth nearly equalling the tube: corolla yellowish, the narrow erect ban- 

 ner 0-7 lines long. Pod white-pubescent, on a stipe as long as the calyx, 

 oblong-ovate, subsulcate on the back, the ventral suture somewhat promi- 

 nent, straight, reflexed, 4-5 lines long. On open hillsides, southwestern 

 Oregon. 



A. Vaciiieus Sheld. Bull. Minn. Nat. Hist. Surv. 9, 174. A. Hender- 

 soni Watson, not Baker. Thinly pubescent throughout with soft woolly 

 hairs, the numerous stems erect or ascending from a stout perennial root- 

 stock, 1-2 feet high : leaflets 0-10 pairs, narrowly oblong, obtuse or 

 retuse, 0-9 lines long; stipules lanceolate : pedunculate racemes exceeding 

 the leaves, few-flowered: calyx tubular-campanulate, dark-villous, 3-4 

 lines long, the narrow teeth nearly equalling the tube : pods reflexed, 2- 

 celled, very fleshy-coriaceous, upon a stipe twice longer than the calyx, 

 turgid, oblong to oblong-obovate, with a stout prominent ventral suture, 

 the dorsal less prominent, very abruptly mucronate, glabrous, rugose, 

 8-11 lines long by 4 thick. Open hillsides, Jackson Co., Oregon and ad- 

 jacent California'. 



S '2 CH^TODONTES Gray 1. c. 194. Pods ovate, small, sessile, 

 coriaceous, turgid or at times subcompresst r el, more or less sulcate 

 on the back, 2-celled by the intrusion of the dorsal suture, cells 

 > 4-ovuled. Many-stemmed perennials. 



A. Spaldiugii Gray 1. c. 524. Yillous-pubescent : stems a foot in height : 

 leaflets 21-25, lanceolate to oblong-linear, 3-0 lines long: peduncles ex- 

 ceeding the leaves : spikes oblong, dense, or rather loose at base ; flowers 

 nearly 5 lines long: bracts setaceous ; calyx very villous; pods 2-3 lines 

 long, villous scarcely sulcate, 2-4-seeded. Plains of eastern Washington 

 and Idaho. 



A. Lyallii Gray 1. c. 195. White-silky : stems a foot high, leaflets 

 19-25, 3-0 lines long, lanceolate to oblong-linear : peduncles not exceeding 

 the leaves; spikes long and loose ; calyx villous, the tube equalling the 

 teeth : pods hoary, sulcate. Valley of the Yakima, Wash., near the Brit. 

 Columbia boundary. 



'>. VLKJIXOSI Gray 1. c. 196. Pod coriaceous, turgid, ob- 

 long, terete, scarcely sulcate and only on the back, nearly 

 straight, sessile, septum perfect. Tall perennials with appressed 

 gray-pubescence or glabrate. 



A. Mortoni Nutt. Journ. Acad. Philad. vii, 19. Minutely appressed- 

 pubescent, greenish : stems erect 18-24 inches high: stipules broad and 

 membranaceous ; leaflets 11-17, oblong, obtuse, 0-12 lines long: peduncles 

 as long as the leaves; flowers sessile or nearly so, in dense racemose 

 spikes, reflexed as they open, the fruit erect; calyx villous, its teeth triang- 

 ular-lanceolate, shorter than the tube: pods lines long, minutely pubes- 

 cent, elongated-oblong, grooved at the dorsal suture, the ventral suture 

 externally prominent : seeds numerous. Dry plains, eastern Oregon and 

 Washington to Montana, Utah and Nevada. ' 



4. OXOBRYCHIDES Gray 1. c. 1W>. Pods coriaceou-, oblong 



