150 Preussii. 
sides 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 1-15 em. long, white or purpie-tinged, blades 
of petals longer than calyx. Banner oblong-ovate, acutish, gently 
arched 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 em. long, 
nearly linear, flat. Lower stipules not connate. Plants somewhat 
ashy, rather stout. In gravelly places on the desert side of the San 
ernerdino Mts. California. s 
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. 9 139 
(1894). Tragacantha Serenoi Kuntze Rev. Gen. 2 941 (1891). A; 
nudus Watson, A. Shockleyi Jones, A. oblatus Sheldon, A. cam- 
pylophsilus ‘reene, Pods erect or ascendia”. obliquely oblong-oval, 
obliquely beaked and inserted, about 2 cm. long, 5-7 mm. high, 1 em. 
wide, about half-plum-shaped, with dorsal suture variously intruded 
and the ventral a little so, with cross-section nearly round, Flowers 
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 em. long, 1-2 pairs, linear, rather deciduous, 
with rachis nearly as thick as the stems, stiff and ascending. Stl- 
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 Cont 8 15 (1898). This is prob- 
ably only a form of A. Serenoi. Pods obliquely cylindrical, about 2 
. em. long, a little obcompressed and arcuate, only a trifle inflated, pseu- 
dostipitate when dry, with cross section oblate to oval and even retuse 
ventrally when dry, with dorsal suture intruded about half way, but 
the sutures do not touch. Fresh pod round 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-purple. 
. 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- 
shaped below but soon disappears 6 mm. below the tip of banner. 
Petals thin. Wings 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 mm. long 
~ and high, abruptly rounded to 90 degrees, with obtusely triangular 
