150 ' Preussii. 



Bides rounded and coarsely net-veined, smooth, mottled; base tapering 

 Into a stipe a little longer than the calyx; cross section inclined to be 

 quadrangular to linear when dry, when fresh probably oblate-oval. 

 Ovary glabrous. Flowers 1-1.5 cm. long, white or purple-tinged, blades 

 of i)etals longer than calyx. Banner oblong-ovate, acutish, gently 

 urched beyond calyx tips to 45 degrees. Wings a trifle longer than 

 keel, narrow, nearly straight, little shorter than banner. Keel blade 

 short, with the abruptly arched erect tip acutish, 5 mm. long, 3 mm. 

 high; claw exserted. Calyx 5 mm. long, campanulate in the type, 

 tube 3 mm. long, cleft deeper above, puberulent; teeth subulate, from 

 a broad base, about one half the tube. Bracts ovate, small. Fruiting 

 pedicels 2 mm. long. Peduncles including rachis often 1 ft. long, stout, 

 floriferous on the upper third. Spikes either short and dense, or elon- 

 gated and lax at last. Petiole very short. Leaves including rachis 

 1-1.5 cm. long. Leafltes 7-12 pairs, sometimes acute, 1.5-2 cm. long. 

 nearly linear, flat. Lower stipules not connate. Plants somewhat 

 -ashy, rather stout. In gravelly places on the desert side of the San 

 .■;eni:;rdino Mts. California. 



Astragalus bicristatus Var. tetrapteroides Jones Cont. 10 59 (1902). 

 Pods a little winged at the sutures; stipe twice the calyx. Flowers in 

 dense heads which scarcely elongate with age. large. Calyx teeth 

 barely one third the tube. Peduncles only a little longer than the 

 leaves. Bear Valley in the same range, hardly a good variety as the 

 pods vary much. 



106. Astragalus Serenoi (Kuntze) Sheldon Minn. Bot. Stud. 9 130 

 (1894). Tragacantha Serenoi Kuntze Rev. Gen. 2 941 (1801). A. 

 nu dus Watson, A. Shockleyi Jones, A. oblatus Sheldon, A. cam- 

 pyloph.^l)u.s C-rtene. Pods erect or ascendi-r'. otliquely oblong-oval, 

 obliquely beaked and inserted, about 2 cm. long, 5-7 mm. high, 1 om. 

 wide, about half-plum-shaped, with dorsal suture variously intruded 

 and the ventral a little so, with cross-section nearly round. Flowei.; 

 6-8. distant. Banner blade about 1.5 cm. long. Pedicels shorter than 

 the bracts, stout, 4 mm. long in fruit. Proper peduncles as long as 

 the leaves. Leaflets 1.5-2.5 cm. long, 1-2 pairs, linear, rather deciduous, 

 with rachis nearly as thick as the stems, stiff and ascending. Sti- 

 pules ovate-acuminate, deltoid, green-tipped, 1 mm. long, internodes 

 5-10 cm. long. This grows in the alkaline valleys of western Nevada 

 from Carson Sink to near Candelaria in large tufts. 



107. Astragalus canonis Jones Conl S 15 (18i;8). This is prob- 

 ably only a form of A. Serenoi. Pods obliquely cylindrical, about 2 

 cm. long, a little obcompressed and arcuate, only a trifle inflated, pseu- 

 do-stipitate when dry, with cross section oblate to oval and even refuse 

 ventrally when dry, with dorsal suture intruded about half way, but 

 the sutures do not touch. Fresh pod roimd in cross-section, smooth, 

 with flesh about 1 mm', thick and transparent and with inner wall 

 more fibrous buts cuts easily, when dry the pod is woody and not 

 stipitate, strongly and sharply conical beaked, with each partial 

 cell almost cylindrical. Flowers 2-2.5 cm. long, white to light-jiurple. 

 Banner oblong-ovate, 1.5 cm. long, pink-purple, deeply notched, gently 

 arched to 80 degrees at calyx tipes, with sides reflexed to the groove 

 the reflexed part 2 mm. wide below and the edges nearly touching 

 behind. White spot in banner narrowly oblong, 1 cm. long, 

 filling all the groove, interruptedly purple-veined and going almost to 

 the tip where it shades into purple. Groove in banner (sulcus) U- 

 Fhaped below but soon disappears 6 mm. below the tip of banner. 

 Petals thin. Wing.s 6 mm. long, oblong, oblique, notched on the lower 

 side near the tip, fully 2 mm. wide and the obtuse tip a little wider, 

 scarcely arched, purple above, concave to keel and the tips overlapping 



, beyond the keel, not flaring, 3 mm. longer than keel. Keel 3 mi.-i. long 

 and high, abruptly rounded to 90 degrees, with obtusely trifingular 



