NORTH AMERICAN FLORA 



[Volume 24 



Plants perennial; mostly native species. 



Calyx more than half as long as the corolla, its teeth subulate or 

 subulate-lipped, twice as long as the tube or more. 

 Pods loosely pubescent with spreading kinked hairs; decum- 

 bent suffruticose plants; leaves conspicuously punctate 

 beneath. 

 Pods closely strigose. 



Leaflets acute at the base, subsessile. 



Leaves strongly ascending, at least the lower ones 

 unifoliolate; lateral leaflets opposite on the rachis; 

 racemes erect. 

 Leaves spreading, the lower not unifoliolate; leaflets 

 often alternate on the rachis; racemes ascending. 

 Leaflets rounded at the base, distinctly petioluled, usually 

 5. 

 Calyx less than half as long as the corolla, its teeth lanceolate or 

 deltoid, not at all or not much exceeding the tube in 

 length. 

 Pods not strongly flattened, rounded, subrhombic or oval in 

 cross-section; seeds turgid or prismatic. 

 Pods gradually tapering into a long beak, straight, linear, 



many-seeded. 

 Pods abruptly contracted into a slender short beak. 

 Pods linear, 3-12-seedcd, often more or less curved. 

 Pods oblong, ovoid, or spheric, 1-3-seeded, rarely 

 4-seeded. 

 Pods strongly flattened, linear in cross section, 4 mm. broad, 

 seeds flat. 



One species. 

 One species. 



One species. 



One species. 



I. HlRSUTAB 



II. Viscosae 

 III. ParviploraE 



IV. Hbndecaphyllae 



V. MlCROCARPAB 



Plant somewhat canescent. with strictly appressed hairs; pods 4-6-seeded. 

 Plant almost white, with loose kinked hairs; pods 3- or 4-seeded. 



VI. LespBdbzoidbs 



V. MlCROCARPAB. 



VI. Lespbdbzoides. 

 VII. Leptosepalae. 

 VIII- Mucronatae. 



IX. Thibaudianae 



X. TlNCTORIAE. 

 XI. DlSPERMAE. 

 XII. PlatycarpaB. 



1 . /. hirsuta. 



2. I. viscosa. 



3. /. parvi flora. 



4. /. hendecaphylla. 



5. /. sabulicola. 



6. /. domingensis. 



One species. 



VII. LeptosEpalab 

 Leaflets strigose on both sides. 



Leaflets all cuncate, truncate or refuse at the apex. 



Leaflets oblanceolate to linear, acute to rounded at the apex, only those 

 of the lower leaves sometimes cuneate in no. 9. 

 Corolla 8-11 mm. long; pods 3 mm. thick, 2-3 cm. long. 



Stem 5-10 dm. high; racemes much longer than the leaves; 



corolla 10-11 mm. long. 

 Stem about 1 dm. high, from a stout caudex; corolla 8-9 mm. 

 long. 

 Corolla 5-8 mm. long; pods less than 3 mm. thick, 1-2.5, cm. long. 

 Plant rather stout, erect or nearly so, silvery-white pods 2.5 



mm. thick or more. 

 Plant slender, decumbent to ascending, not white; pods about 

 2 mm. thick. 

 Racemes short and dense, shorter than the leaves; leaflets 

 of the lower leaves rounded at the apex, those of the 

 upper obtuse or acutish. 

 Racemes lax, longer than the leaves except in depauperate 

 specimens; leaflets acute or those of the lower leaves 

 obtuse. 

 Leaflets glabrous or nearly so above. 



Leaflets narrowly oblanceolate, acute; racemes lax; corolla 8-9 mm. 



long. 

 Leaflets oblanceolate or cuneate, rounded or obtuse at the apex; 

 racemes short and dense ; corolla 6-7 mm. long. 



Tods not strongly torulose. 

 Leaflets glabrous above. 



VIII. Mucronatae 



7. /. lespedczoides. 



8. /. sphenoides. 



9. /. leptosepala. 



10. /. nana. 



11. /. argenlala. 



12. /. brcvipes. 



13. /. miniala. 



14. /. acutifolia. 



15. /. Hartwegii. 



16. /. loevis. 



