FABACEAE. 



195 



Pod a loment, i. e., breaking up transversely into i -seeded indehiscent 

 reticulate internodes. Tribe IX. Hedysareae. 



Rachis of the leaves produced into a tendril or bristle-like appendage. 



Tribe X. Vicieae. 



One genus. 

 One genus 

 One genus 



Tribe I. SOPHOREAE. 

 Tribe II. PODALYRIEAE. 

 Tribe III. GENISTEAE. 

 Tribe IV. TRIFOLIAE. 



Leaves digitate ; in ours 3-foliolate. 

 Leaves pinnately 3-foliolate. 



Pod curved or coiled. 



Pod straight. 



One genus. 



Tribe V. LOTEAE. 



Tribe. VI. GALEGEAE. 



i. SOPHORA. 



is. Thermopsis. 



3. LUPINUS. 



4. Trifolium. 



5. Medicago. 



6. Melilotus. 



7. Anisolotus. 



, Leaves pinnate or unifoliolate. 



A. Blade of the standard as broad as long, spreading ; trees. 

 Leaflets with stipels ; pod broad, margined on one edge. 



8. Robinia. 

 Leaflets without stipels ; pod narrow. 9. Peteria. 



B. Blade of the standard relatively narrow, mostly erect; herbs. 

 I. Keel (lower petals) not produced into a beak. 



u. Pods 2-celled, with a perfect partition. 



Pods fleshy, indehiscent or very tardily dehiscent. 10. Geoprumnon. 

 Pods membranous, leathery or woody, dehiscent. 

 Pods not inflated. 



Pods ovoid or oblong, rarely almost didyraous, terete or vertically 



flattened, leathery or woody. 11. Astragalus. 



Pods linear, somewhat laterally flattened, membranous. 



12. Hamosa. 

 Pods strongly inflated, papery. 13. Cystium. 



6. Pods i-celled, the partition, if any, rudimentary. 



Lower suture strongly intruded, making the pod sagittate or obcordate 

 in cross-section ; pod membranous, rarely leathery. 



14. TlUM. 

 Lower suture not intruded or merely slightly so ; pods in the latter case 

 woody. 

 Pods strongly inflated, papery. 25. Phaca. 



Pods not inflated, or slightly so, membranous to woody. 



Pods with a partial partition, formed by the inflexion of the lower 

 suture. 

 Pods membranous. 15. Atelophragma. 



Pods woody. 



Pods stipitate ; leaves unifoliolate. 16. Jonesiella. 



Pods sessile ; leaves pinnate. 



Calyx-tube short, campanulate, equalling or shorter than the 



lobes; tall glabrous plants. 17. Phacopsis. 



Calyx cylindrical, longer than the lobes ; low cespitose, ciner- 

 ous or villous plants. 18. Xylophacos. 



Pods without a vestige of a partition. 



