7b. Low shrubs; leaves once-pinnate (3-6 dm. high; summer) --8.

8a. Flowers bright-blue, each with a single petal
=Lead Plant, Amorpha canescens.=

8b. Flowers yellowish and pink-purple, petals 5 --26a.

9a. Leaflets 5-7; flowers in racemes (purplish, late summer)
=Wild Bean, Apios tuberosa.=

9b. Leaflets 3 (flowers greenish, purple, or white, late summer) --10.

10a. Flowers in small capitate clusters; lower 2 petals strongly
incurved =Wild Bean, Strophostyles helvola.=

10b. Flowers in racemes (Hog Peanut) --11.

11a. Stem pubescent or glabrate; leaflets seldom more than 5 cm. long
=Hog Peanut, Amphicarpa monoica.=

11b. Stem villous with retrorse hairs; leaflets usually longer than 5 cm.
=Hog Peanut, Amphicarpa pitcheri.=

12a. Style with a tuft of hairs at the apex; lateral petals of the
corolla adherent to the lower ones as far as the middle;
stipules less than 10 mm. long, and usually less than
one-fourth the length of the lower leaflets (spring and
summer) (Vetch) --13.

12b. Style hairy along the inner side; lateral petals of the
corolla free from the lower ones or adherent only at the
very base; stipules more than 8 mm. long and usually
one-third or more the length of the lower leaflets (late
spring and summer) --17.

13a. Flowers axillary, sessile or nearly so (flowers purple) --14.

13b. Flowers in peduncled racemes --15.

14a. Upper leaves oblong-obovate, truncate or notched, and
mucronate at the apex =Spring Vetch, Vicia sativa.=

14b. Upper leaves lance-linear, sharply acute
=Common Vetch, Vicia angustifolia.=

15a. Flowers 15-20 mm. long, 4-8 in a cluster (flowers purple)
=Vetch, Vicia americana.=

15b. Flowers 8-12 mm. long --16.

16a. Racemes one-sided; flowers blue =Vetch, Vicia cracca.=

16b. Racemes loosely flowered, not one-sided; flowers whitish, the
lower petals tipped with blue =Vetch, Vicia caroliniana.=

17a. Flowers yellowish-white =Vetchling, Lathyrus ochroleucus.=

17b. Flowers purple --18.

18a. Stipules nearly