251 Lonchocarpi. } 



circular, a trifle sulcate ventrally, ventral suture a little the more 

 arched, the cavity much wider than the seeds and so decidedly in- 

 flated, smooth. Flowers white, 1-1.5 cm. long, straight, ascending. 

 Calyx cylindrical, about 6 mm. long and 2- mm. wide, about round, 

 with triangular rather fleshy oblique base attached on the lower 

 corner straight with base, slightly oblique at tip, with subulate teeth 

 from a deltoid base about 1 mm. long. Petals about as in A. Epis- 

 copus. The flowers approach those of A. lonchocarpus. Lower Tem- 

 perate life zone, growing in sandy places at House Rock north of 

 Lee's Ferry, Ariz. 



212. Astragalus Osterhouti n. sp. Pods (including the short 

 stipe) 3.5-4 cm. long, about 4 mm. high, slightly to much laterally 

 flattened, the cross section being narrowly elliptical to oval, not at 

 all sulcate at either suture, acuminate at both ends, the tip a long 

 flat beak, the base with the rather thick sutures uniting into a stout 

 stipe as long as or much shorter than the calyx, surface smooth, 

 reticulations slight and wide, ventral suture inclined to be convex 

 about two-thirds the way up, and sutures equally approaching above, 

 but not always, with the general appearance of A. Kaibensis. Pods 

 short-racemose, rather many, on pedicels 4-7 mm. long, which are 

 several times longer than the small bracts. Flowers ochroleucous, 

 about 2 cm. long, about as in A. racemosus. Banner about 1 cm. 

 long, ovate, arched remotely from calyx to 45°, with sides much re- 

 flexed below, 4-6 mm. longer than wings. Wings about 2 mm. wide, 

 3 mm. longer than keel, nearly straight. Keel about 4 mm. long and 



2 mm. wide, the tip very obtuse and rounded, 3 mm. high. Calyx 

 tube 6-7 mm. long, about 4 mm. high, oblique and cleft deeper above, 

 the base deltoid or rounded, not saccate, teeth not 1 mm. long, tri- 

 angular, surface minutely pubescent with sparse and very short 

 appressed hairs. Peduncles about a foot long, very stout, often 4 

 mm. thick, subterminal. Leaves about 1 dm. long, wide, of about 

 4-5 pairs of linear, thick, blunt, rather arcuate leaflets 2-3 cm. 

 long and 2 mm. wide, phyllodia-like and gi-een as are the rachis and 

 peduncles. Petiole shorter than the lowest leaflet. The upper leaf- 

 lets are almost sessile and the lower rather long-petiolulate, but all 

 jointed to the coarse but tapering rachis. Stems probably 2-3 ft. 

 high. Stipules small, inclined to be connate opposite the petiole. 

 This remarkably distinct species certainly belongs here in flowers 

 and general fruit character but other characters remind one 

 forcibly of the Episcopus group. Sulphur Springs, Grand Co., Colo- 

 rado. Nos. 3038 and 3235, July, 1905, and June, 1906, Geo. E. Os- 

 terhout for whom it is named. Lower Temperate life zone. 



213. Astragalus Duchesnensis Jones Cont. 13 9 (1910). Plants 

 with the filiform and much branched underground stems of A. jun- 

 ceus, loosely tufted with mostly single stems to a root-branch. In- 

 ternodes 2.5-5 cm. long. Whole plant except the calyx ashy. Stems 

 racemosely branched from the base and angled to about 45°. Leaves 

 5-8 cm. long, with about 3 pairs of leaflets 1-2 mm. wide and 1-2 

 cm. long, petiolulate. Peduncles and rachis about 1 dm. long. Bracts 

 minute and deltoid. Pedicels in flower very short, in fruit 2 mm. 

 long. Calyx and pedicel nigrescent. Calyx short-cylindric, about 



3 mm. long and 2 mm. wide, reddish, cleft deeper above, not com- 

 pressed, teeth rudimentary and deltoid. Flowers red to pink-pur- 

 ple, drying blue, banner oval, about 7 mm. long, arched to 90^ in 

 gentle arc from calyx tip, sides reflexed about 1 mm. wide, most in 

 the middle, a little black-nerved above, notched, a trifle longer 

 than wings, white spot with about 6 broad and white bands coming 

 within 1 mm. of tip and sides, sulcus shallow and very broad. 

 Wings lunate-oblanceolate, 2 mm. wide, a little narrowed above, 

 obtuse, arched about 45", white, entii'e, flat to the keel and about 

 1 mm. longer. Keel with arched base, tip very broad, incurved more 

 than 90°, about 2 mm. high, black-purple tipped, surpassing calyx by 

 5 mm., tip deltoid at end. Pods white when young, nearly straight 

 but arcuate rather more below or sometimes forming a slight S 



