348 PAPILIONACEAE 
1z. ROBINIA, L. 
Our species a tree with long pendant clusters of showy white flowers. 
Leaves feather-formed; stipules small, sometimes spiny. Calyx teeth 
slightly unequal. Standard large, rounded and turned backward. Pod 
flat, linear, several seeded. 
R. Pseudacacia, L. (Fig. 3, pl. 77.) Common Locust. Our com- 
mon locust tree has rough bark and grows to height of 80 ft., but is 
usually not more than from 30 to 50 ft. high. Pod 2 to 4 in. long. 
Leaflets 8 to 12 pairs with an odd one at the end. Stipules are often 
spiny. May-June. 
13. ASTRAGALUS, L. 
Herbs, leaves compound, mostly with an odd number of leaflets; purple, 
white or yellow flowers in spikes, loose clusters or solitary. Stamens, 
9 united, 1 free; calyx of 5 nearly equal teeth. Standard erect, ovate 
or oblong, usually narrow, keel blunt; pod several seeded, generally 
turgid. 
1. A. Robbinsii, (Oakes.) A. Gray. (Fig. 5, pl. 77.) Ropsins’s 
MiLkK VeEFcH. Nearly smooth, erect, + to 1 ft. high. Leaflets 9 to 25. 
Flowers white or purplish, 4 to 3 in. long, in loose elongated or short 
clusters. Rocky places, Maine and northern Vermont. June-July. 
Var. A. Robbinsii Jesupi, Eggleston and Sheldon, has larger, darker 
purple flowers, longer pod, and a flower-stalk longer than the calyx. 
Localities as above. 
‘2. A. alpinus, L. (Fig. 4, pl. 77.) Awprne Mitk VetcH. Plant 
branching, decumbent or erect, 3 to 1 ft. high, smooth or slightly hairy. 
Flowers violet-purple. Rocks, northern New England. June. 
3. A. canadensis, L. CaroLtinA MILK VetTcH. (A. carolinianus, 
L.}. Plant 1 to 4 ft. high. Leaflets 15 to 31. Stipules lance-shaped. 
Flowers yellowish. Pod without stem, 2-celled. Shores of Lake Cham- 
plain. (Brainerd.) 
14. CORONILLA, L. 
Herbs with several pairs of leaflets and an odd one. Flowers purple 
or yellowish, in an umbel. Pod linear, jointed. Calyx teeth nearly equal. 
Standard nearly orbicular. 
C. varia, L. (Fig. 8, pl. 77.) Coroni~ta. Leaflets 6 to 7 pairs 
and an odd one. Flower stalks longer than the compound leaves. Flowers 
light purple (standard pink, wings white or purple). Plant 1 to 2 ft. 
high, generally reclining on shrubs or other plants, Connecticut and 
southern New York. Introduced. June-August. 
15 HEDYSARUM, L. 
Herbs with several pairs of leaflets and an odd one. Flowers showy 
in axillary clusters. Calyx of 5 awl-shaped teeth, nearly equal. Stamens, 
9 united, 1 free. Pod flattened and distinctly jointed. 
H. boreale, Nutt. (Fig. 7, pl. 77.) Hepysarum. (H. americanum, 
(Michx.) Britton.) Plant 4 to 24 ft. high, erect or somewhat decumbent. 
Leaflets 13 to 21, oblong to lance-shaped, nearly smooth. Stipules sealy. 
Flowers purple in a many-flowered cluster. Pods of 3 or 4 joints, smooth 
