624 FABACEAE 
30. AMÓRPHA L.! 
Shrubs, with glandular-punctate foliage. Leaves alternate: blades odd-pinnate. 
Flowers small, blue, purple or white, in spike-like racemes. Calyx subcampanulate, 
5-lobed. Corolla incomplete : standard erect, clawed, folded around the stamens and style ; 
wings and keel none. Stamens 10: filaments united at the base, exserted. Ovary 2-celled. 
Style slender, bearded. Stigma terminal. Pod short, nearly indehiscent, 1-2-seeded. 
Grayish or white-canescent shrubs: lowest pair of leaflets approximate to the stem. 
Calyx-lobes nearly equal, 2-2.5 mm. long: pod with a stout divergent beak. 1. A. canescens. 
Calyx-lobes unequal, the longest about 1.5 mm. long : pod with a slender, nearly 
erect beak. 2. A. herbacea. 
oki or inconspicuously pubescent shrubs: lowest pairof leaflets remote from 
the stem. 
Leaflets with the veins very prominent beneath : inflorescence a long branched 
anicle. 3. A. paniculata. 
p 
Leaflets with the veins not noticeably prominent : inflorescence simple or of 
clustered racemes, 
Pods eurved on the back. 
Blades of the leaflets mostly rounded at both ends, the midrib sometimes 
prolonged into a short mucro. 
Flowersin long solitary racemes: pods not punctate or merely with few 
minute glands. 4. A. nitens. 
PRAEC mostly clustered : pods punctate with many conspicuous raised 
glands. : 
Pods slender, about 6 mm. long, about 2 mm. broad. 5. A. Tennesseensis, 
Pods stout, about 8 mm. long, about 3 mm. broad. 6. A. fruticosa. 
Blades of the leaflets mostly acute at the apex, cuneate at the base: the aus 
midrib prolonged into a prominent awn-like cusp. 7. A. angustifolia. 
Pods nearly straight on the back. 
Mature pods 7-8 mm. long. 
Calyx-lobes triangular, sharp-pointed, the sinuses narrow and acute. 
ength of leaflets not twice their width. 8. A. Texana. 
Length of leaflets more than twice their width. 9. A. virgata. 
Calyx-lobes nearly obsolete or at most very shallow, the sinuses broad 
and obtuse : leaflets with thin and smooth blades. 10. A. montana. 
Mature pods 4-6 mm. long. 
Blades of the leaflets cuneate at the base: standard reniform, broader 
than long. 11. A. laevigata. 
Bladesof the leaflets rounded at the base: standard broadly spatulate, 
longer than broad. 12. A. glabra. 
1. Amorpha canéscens Pursh. Suffruticose, 3-9 dm. high, the whole plant white- 
canescent. Leaves curved, 5-12 cm. long; blades sessile or nearly so; leaflets 15-47, 
crowded, the blades oval or ovate-lanceolate, 9-18 mm. long, rounded at the base, subacute 
at the apex : racemes dense, clustered, 5-18 cm. long, the flowers on very short pedicels : 
eke about 5 mm. long: lobes subulate-lanceolate, nearly equal, 2-2.5 mm. long: stand- 
ard obovate or broadly spatulate, about 5 mm. long, light blue: pods about 4 mm. long, 
densely tomentose. 
On dry prairies, Texas, New Mexico and northward. Summer. 
2. Amorpha herbacea Walt. Low and suffruticose, the whole plant grayish -pubes- 
cent. Leaves numerous; blades very short-petioled, 4-16 cm. long; leaflets 11-37, the 
blades elliptie, oblong or oblong-ovate, 9-16 mm. long, rounded at both ends, plainly dot- 
ted with dark glands; petiolules about 1 mm. Jong: racemes clustered, 4-30 cm. long : 
calyx about 4 mm. long, the two upper lobes broader and shorter than the acute lower 
ones : standard broadly spatulate, 4-5 mm. long, varying from violet-purple to white : pods 
4-5 mm. long, 2-2.5 mm. wide, rounded on the ventral and nearly straight on the do 
suture, marked with numerous dark glands. : 
In sandy and sterile soil, North Carolina to Florida. Spring. 
3. Amorpha paniculata T. & G. A coarse shrub 2-4 m. high, with tomentose" 
canescent shoots. Leaves 12-30 cm. long; leaflets 11-17, the blades ovate- or en pe 
oblong, 2-5 cm. long, rounded and often emarginate at the apex, obtuse or subcordate » 
the base, densely velvety-tomentose beneath, the upper surface shining and sparsely pepe 
tose when young, becoming glabrate in age, the veins impressed on the upper iine er 
prominently raised on the lower: racemes long and slender, disposed in a large branching 
panicle: calyx about 4 mm. long, the lobes subulate-lanceolate, about 2 mm. long. 
In swamps and salt marshes, eastern Texas. Summer. :oh 
,.. 4. Amorpha nitens Boynton. A branching nearly glabrous shrub 1.5-3 im z 
with glossy twigs und shining leaves. Leaves 12-25 cm. long; leaflets 7-19, the re 
thin, oblong-ovate or ovate, 2-6 cm. long, obtuse, rounded at the base, lower surface 
! Contributed by Mr. F. E. Boynton. 
