26 NORTH AMERICAN FLORA [Volume 24 



cylindro-campanulate, angled, very glandular, about 3 mm. long; teeth triangular, acute, 

 densely villous within; stamens exserted; style sparingly hirsute. 



Type locality: Five miles north of Winslow, Arizona. 

 Distribution: Known only from the type locality. 



11. AMORPHA L. Sp. PI. 713. 1753. 



Shrubs, with glandular-dotted foliage. Leaves odd-pinnate, with setaceous stipules and 

 petioluled entire leaflets. Flowers in spike-like racemes; bracts mostly subulate and decidu- 

 ous. Calyx turbinate, slightly oblique, 5-lobed. Corolla consisting of the banner only, which 

 is erect, incurved, obovate or cuneate in outline, with a more or less developed claw, folded 

 around the stamens, blue, purple, or white. Stamens 10; filaments united at the base only, 

 exserted. Ovary 2-ovuled ; style slender, bearded; stigma terminal. Pod short, 1- or 2-seeded, 

 indehiscent, oblique, somewhat compressed, rounded and broader at the apex, either with a 

 straight back or upcurved. Seeds elongate, oblong or somewhat curved. 



Type species, Amorpha fruticosa L. 



Calyx-lobes lanceolate to subulate, at least half as long as the tube. 



Petioles and raehis of the leaves and usually also the young branches with 

 stalked glands; stipules membranous, lanceolate or oblong. 

 Plant decidedly pubescent; calyx-lobes about equaling the tube. 1. A. colifornica. 



Plant glabrous or nearly so; calyx-lobes about half as long as the tube. 2. .4. hispiditla. 

 Petioles, leaf-rachis, and branches without stalked glands. 



Inflorescence a long, peduncled panicle; leaflets strongly veined and 



tomentose beneath. 3. A. paniculata. 



Inflorescence of solitary or clustered sessile racemes. 

 Plant more or less pubescent. 



Calyx-lobes fully as long as the tube; racemes solitary; leaflets 



brown-villous beneath. 4. A . Schwerini. 



Calyx-lobes about half as long as the tube; racemes clustered; 



leaflets canescent. 5. A. canescens. 



Plant glabrous; racemes solitary; leaflets usually less than 1 cm. long. 6. A. nana. 

 Calyx-lobes very short, the upper broadly triangular or half-round. 



Branches, petioles, leaf-rachis, peduncle, and upper surface of the leaflets 

 glabrous or nearly so. 

 Calyx-lobes all very short, almost obsolete, very broad, separated by 

 broad sinuses; leaflets rounded-oval, often emarginate; pod straight 

 on the back. 7-8 mm. long. 7. A. glabra. 



Calyx-lobes distinct, the upper two broad, the others lanceolate or sub- 

 ulate. 

 Pod curved, about 7 mm. long, narrow, scarcely punctate; leaflets 



broadest below the middle, pubescent beneath. 8. A. nitens. 



Pod straight on the back, 4—7 mm. long, broad, conspicuously punc- 

 tate; leaflets broadest at or above the middle, glabrous. 

 Leaflets broadly oval, usually retuse at the apex. (Glabrate 



form of) 15. A. texana. 



Leaflets oblong to obovate or oval, not retuse at the apex. 



Leaflets not conspicuously punctate beneath, cuneate at the 



base; banner usually broader than long. 9. .4. laevigata. 



Leaflets conspicuously punctate beneath, rounded at the base; 

 banner not broader than long. 

 Calyx with numerous conspicuous glands; pod 4—5 mm. 

 long. 

 Corolla mostly bluish; leaflets elliptic, mostly rounded 

 at both ends, 1-2 cm. (rarely 2.5 cm.) long; racemes 

 usually single; pods glandular-dotted throughout. 10. .4. ca.rolinia.na. 

 Corolla mostly white; leaflets linear-oblong, acute at 

 least at the base, 2-3.5 cm. long; racemes usually 

 clustered; pod glandular-dotted above the middle. 11. .4. crenulala. 

 Calyx with few and inconspicuous glands; pod 6-7 mm. 



long; leaflets 2^1 cm. long. 12. A. Curtissii. 



Branches, petioles, leaf-rachis, and leaflets decidedly pubescent, at least when 

 young. 

 Petioles very short, less than the width of the leaflets, the lowest pair of 

 the latter therefore close to the stem; pod straight on the back, 

 4 mm. long. 

 Plant canescent; calyx-tube densely pubescent. 13. A. herhacea. 



Plant sparingly hairy; calyx-tube glabrous. 14. A. Jloridana. 



Petioles longer than the width of the leaflets, the lowest pair of the latter 

 therefore some distance from the stem; pod 6-9 mm. long. 

 Pod straight on the back; leaflets subcoriaceous, except in A. Bushii. 

 Leaflets of a broadly oval type, not twice as long as broad; leaf- 

 lets reticulate. 15. A. texana. 





