84 
16. A. Missouriensis Nutt. Short-caulescent, hoary with a closely appressed silky- 
pubescence: leaflets 5 to 15, oblong, elliptic, or obovate: flowers few, capitate or 
spicate, 10 to 16 mm. long, violet: calyx oblong, the teeth very slender: pod oblong, 
2.5 cm. long, acute, obtuse at base, pubescent, nearly straight, obcompressed or ob- 
compressed-triangular, depressed on the back aud the ventral suture more or less 
prominent, transversely rugnlose.—Extending from the plains into northern and 
western Texas. 
17. A. amphioxys Gray. Very similar to the last except in the pods which are 
acute at both ends, the base so much narrowed that it often seems stipitate in the 
calyx, texture much thinner, fore-and-aft coinpression greater, and moderately curved 
in the shorter pods, bat strongly so in the longer ones: leaflets more apt to be oblong 
and acute. (A. Shorlianus, var.? minor Gray.) —Extending from New Mexico into 
extreme western Texas. 
18. A. Parryi Gray. Stems short and prostrate: villous with loose spreading hairs: 
leaflets oblong, elliptic or obovate: flowers few, loosely subcapitate on rather short 
peduncles, whitish or yellowish tinged with purple, 12 to 16 mm. long: calyx-teeth 
half shorter than the cylindric tube: pod pubescent, oblong lanceolate, 2.5 cm. long 
or more, arched or at length circinate, strongly obcompressed and rugulose, both 
sutures suleately impressed, contiguous. —Extending from Colorado into northwest- 
eru Texas. 
ll. Pod 1-celled, neither suture being inflexed or the ventral more intruded than the dorsal. 
19. A. triflorus Gray, Low, very much branched from the base, gray with stri- 
gulose hairs: | vaflets linear or linear-oblong: flowers 3 to 15, small, yellowish-white 
or purplish: pod membranous, inflated, glabrous or glabrate, sessile, oval, obtuse or 
acutish, 14 to 24 min. long.—Sandy plains and hills along the upper Rio Grande in El 
Paso County. 
23. OXYTROPIS DC. 
Low and nearly acaulescent perennials, with tufts of numerous very 
short stems from a hard and thick root or rootstock covered with scaly 
adnate stipules, pinnate leaves of many leaflets, seapelike peduncles 
bearing a head or short spike of flowers, and keel tipped with a sharp 
projecting point or appendage.—The pointed keel is the chief distin- 
guishing mark separating this genus from Astragalus. 
1. O. Lamberti Pursh. Silky with fine appressed hairs: leaflets mostly linear: 
flowers rather large, purple, violet, or sometimes white: pod cartilaginous or firm- 
coriaceous in texture, silky-pu escent, strictly erect, eylindraceous-lanceolate and 
long-pointed, almost 2-celled by intrusion of the ventral suture.—Extending from the 
plains into northern and western Texas. Reputed to be a “loco ” plant.-—Var. SERI- 
crea Gray is a robust form, with broader leaflets (from lanceolate to oblong), cylindra- 
ceous pods about 2.5 cin. long, and the pubescence of the leaflets very silky. (0. ser- 
icea Nutt. )—In the mountains of western Texas. 
24. GLYCYRRHIZA Tourn. (L.IQUORICE. ) 
Perennial plants with long sweet roots, glandular-viseid herbage, 
odd pinnate leaves with minute stipules, white or bluish flowers in ax- 
illary spikes, and ovate or oblong compressed often curved pods clothed 
with rough glands or short prickles. 
1. G. lepidota Nutt. (WILD LIQUORICE. ) Tall, 6 to 9 dm. high: leaflets 15 to 19, 
oblong-lanceolate, mucronate-pointed, sprinkled with little scales when young, and 
with corresponding dots when old: spikes peduncled, short: flowers whitish: pod 
oblong, beset with hooked prickles so as to resemble a ‘cocklebur ” on a smaller 
scale,—Along or near the Rio Grande in El Paso County. 
