156 |. Preussii, 
ed claw. Calyx tube about 5 mm. long and 4 mm. high, or a little 
longer and narrower, quite oblique at tip and base, the upper side 
arched and the lower straight, almost white, very thin, the subu- 
late teeth from a broad base about half as long as tube. Bracts 
triangular, hyaline, shorter than the rather slender pedicels which are 
2-4 mm. long. Spikes 1-3. dm. long. Peduncles often a foot long, 
in the middle axils, strict. Leaves about 2 dm. long, nearly sessile, 
ascending, with 10-12 pairs of linear-lanceolate leaflets about 2 cm. 
long, and placed on the upper side of the rachis. Stipules large, 
green, reflexed, about 1 cm. long, acuminate. This is the type but 
the leaflete vary to broadly elliptical and retuse and 1 cm. long. 
Stems from 1-3 ft. long, either strict or decumbent and branched 
below. From the Sevier valley Utah at Salina to Verde Arizona, 
throughout the Navajo Basin and over in the Rio Grande valley of 
New Mexico as far as Mesilla Park, extending a little into the Tropical, 
in poor clay soil Forms of this occur with a pseudostipe 2 mm. 
long caused by the drying of the pulp. 
Astragalus Pattersoni var. pralongus (Sheldon Minn, Bot. Stud. 
9 23 (1894) as species) Jones Cont. 10 65 (1902). A. procerus Gray, 
A, Rothrockii Sheldon. This is a form with oval pods plum-like and 
about 1.5 cm. long. Flowers stubby, with broad banner and wings sel- 
dom much longer than keel, with calyx teeth deltoid and 4 times shorter 
than the tube, with peduncles much shorter than the leaves and sub- 
terminal, and with oval to oval-ovate leaflets 1-2 cm. long and very 
glaucous. The extreme form seems very distinct but it intergrades 
in every particular. In the Virgin valley around alkaline seeps and 
westward to the Charleston Mts, Tropical. Forms intergrading 
variously are found all the way from the Staked Plains of Texas 
through the Rio Grande valley and the Little Colorado and the 
Navajo Basin, but true procerus seems to be found only in the restrict- 
ed area. A form referred to A. Rothrockii from Wooton is an in- 
tergrade. : 
114. Astragalus sabulosus Jones Cont. 2 239 (1891). Pods 3-5 
em. long and about 1.5 cm wide and high, oblong, straight, barely 
oblique, the stout triangular flattish beak straight, about 2-3 mm. long 
and a little above the middle of the end, the base shortly triangular. 
pod finely cross-lined and a little reticulated, reflexed and mostly 
pendent, ashy with minute hairs fixed by the base; surface uniform 
but little sulcate or grooved ventrally, dorsal suture not evidently 
or slightly intruded, neerly round in cross section, a little inflated 
and walls thinner than in Pattersoni. Flower 4-8 on a rachis hardly 
2 em. long, almost capitate, about 2.5 em. long. Banner elliptical, 
about 1.5cm.long. arched abruptly at end of teeth to 45°, with sides 
much reflexed, nearly 1 cm. longer than keel. Wings about 2 mm. 
longer than keel and much narrower. Keel nearly 1 em. long, straight, 
at tip abruptly erect or nearly so and 4-5 mm. high, the tip triangular 
but very obtuse and rounded, dark. Calyx tube 1 em. long, 6 mm. high, 
oblique at both ends, by being cleft deeper above and by the truncate 
base a little saccate above, inserted a trifle below the middle on a 
very stout hairy pedicel 2-3 mm. long, brownish-nigrescent with close 
pressed hairs. Calyx teeth deltoid about 2 mm. long. Hyaline bracts 
ovate and about 3 mm. long. Stipules deltoid to triangular, coarse, 
thick and spreading, about 5 mm. long. Peduncles very stout, about 
2 mm. thick, and 5 cm. long, shorter than the leaves, in the middle 
axils. Leaves in flowering time rarely 1 dm. long, later ones often 
a foot long, conspicuously petioled, the petiole much longer than rachis 
when leaflets are few, when with several pairs of leaflets it is often 
shorter than rachis. Leaflets on the upper side of the rachis, rarely 
single but mostly 1-3 pairs in the young leaves or 5-6 pairs in the 
late ones, about ovate-diamond-shaped or obovate or even lanceolate, 
