PEA FAMILY 
105 
or roundish, 2.4 to 4.8 cm. long; racemes short, dense; calyx-teeth rather 
more than y 2 as long as the corolla; corolla 10 to 12 mm. long; stamens 
monadelphous.—Bushy or wooded hills. 
10. ROBINIA L. Locust 
Trees or shrubs. Leaves pinnate, often with spines or prickles for 
stipules. Flowers showy, in axillary racemes. Calyx 5-toothed, the two 
upper teeth partly united. Standard large, turned back; keel incurved, 
blunt. Pod broadly linear, flat, several-seeded. (Jean Robin, father, and 
Vespasien Robin, son, herbalists to Henry IV of France.) 
1. R. pseudacaciaL. Common Locust. Tree; branchlets naked; ra¬ 
cemes slender and loose-hanging; flowers fragrant, white; pods smooth.—• 
Cult, from the e. U. S. It was used as a shade tree by the American set¬ 
tlers in California from the earliest days. 
11. ASTRAGALUS L. Rattle-weed. Loco-weed 
Herbs with pinnate leaves. Flowers in spikes, racemes or heads. 
Corolla usually long and narrow. Stamens diadelphous. Pod 2 to many- 
seeded, usually turgid or inflated and bladder-like. (Ancient Greek name 
for some leguminous plant.) 
Pods strongly inflated; perennials. 
Pods stipitate. 
Stipe not more than twice as long as calyx.1. A. oxyphysus. 
Stipe more than twice as long as calyx.2. A. leucophyllus. 
Pods not stipitate. 
Pods glabrous or sparsely pubescent. 
Seed-bearing suture somewhat intruded; stipules distinct. 
3. A. douglasii. 
Seed-bearing suture not intruded: stipules meeting or united on 
opposite side of stem from leaf.4. A. menziesii. 
Pods rather densely pubescent.5. A. hornii. 
Pods not strongly inflated. 
Perennials. 
Pods stipitate .6. A. trichopodus. 
Pods not stipitate.7. A. pycnostachyus. 
Annuals; pods not stipitate. 
Pods elliptic-ovate, 2-seeded, wrinkled transversely. 
Pods erect, little exserted from the calyx.8. A. didymocarpus. 
Pods deflexed, well exserted from the calyx.9. A. nigrescens. 
Pods linear or nearly so, several to many-seeded, not wrinkled trans¬ 
versely ..10. A. teiter. 
1. A. oxyphysus Gray. Stems rigid, erect, 5 to 8 dm. high; leaflets 
15 to 23, oblong to linear-oblong; racemes elongated; flowers white or 
greenish-white, 14 to 16 mm. long; pods semiobovate, 3.6 to 4.8 cm. long; 
seeds numerous.—Inner South Coast Ranges. 
2. A. leucophyllus T. & G. Stems erect, stoutish, 5.7 to 8.6 dm. high; 
leaflets 21 to 31, narrowly oblong or linear, 12 to 20 mm. long; ra¬ 
ceme densely flowered and long-peduncled; flowers yellowish white; pods 
on a long thread-like stipe, 3 to 3.6 cm. long.—Low dry hills, inner ranges, 
cent. Cal. Said to be poisonous to horses and sheep. 
3. A. douglasii (T. & G.) Gray. Stems ascending, 3 to 8 dm. high; 
leaflets 15 to 25, linear to oblong-linear; racemes many-flowered; flowers 
whitish or yellow, spreading; pods remarkably inflated, oblong to ovate.— 
South Coast Ranges to the mts. of S. Cal. 
4. A. menziesii Gray. Stems erect or decumbent, 2.8 to 11.5 dm. high ; 
