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 
Tribe I. SOPHOREAE. 
X. 
VlCIEAE. 
One genus. 
Tribe II. PODALYRIEAE. 
1. 
SOPHORA. 
One genus 
Tribe III. GENISTEAE. 
2. 
Thermopsis. 
One genus 
Tribe IV. TRIFOLIAE. 
3 - 
Lupinus. 
Leaves digitate ; in ours 3-foliolate. 
Leaves pinnately 3-foliolate. 
4 - 
Trifolium. 
Pod curved or coiled. 
5 - 
Medicago. 
Pod straight. 
Tribe V. LOTEAE. 
6. 
Melilotus. 
One genus. 
Tribe. VI. GALEGEAE. 
7 - 
Anisolotus. 
I. 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. 
1. Keel (lower petals) not produced into a beak. 
a. 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 didymous, terete or vertically 
flattened, leathery or woody. 11. Astragalus. 
Pods linear, somewhat laterally flattened, membranous. 
12. Hamosa. 
Pods strongly inflated, papery. 13. Cystium. 
b. Pods 1-celled, the partition, if any, rudimentary. 
Lower suture strongly intruded, making the pod sagittate or obcordate 
in cross-section; pod membranous, rarely leathery. 
14. Tium. 
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. 
