130 FABACEAE 



Keel blunt, not beaked. 



Legumes straight or nearly so, acute, dehiscent. 



Stipules foliaceous; leaves regulaly odd-pinnate. 9. Hosacklv. 



Stipules gland-Uke; leaves irregularlj' even-pinnate. 10. Anisolotus. 



Legumes curved, indehiscent, caudate-acuminate. 11. Syrmatium. 



Tribe YI. PSORALEAE. 

 Petal 1 (standard) ; leaves odd-pinnate. 12. Amorph.v. 



Petals 5. 



Wings and keel free from the filament-tube; ovules solitary; leaves digitate. 



13. Psora LEA. 

 Wings and keel more or less adnate to the filament-tube; o\'nles 2-6; leaves odd- 

 pinnate. 

 Stamens 9 or 10. 

 Stamens 5. 



Tribe VII. GALEGEAE. 

 Leaflets with stipels; pods margined on one edge; trees or shrubs. 

 Leaflets without stipels; pods not margined; herbs or undershrubs. 

 Stipules modified into spines. 

 Stipules not modified into spines. 



Keel (lower petal) not produced into a beak. 

 Leaves odd-Dinnate, or unifoUolate or simple. 

 Pods papery, strongly inflated. 

 Pods strictly 1-celled. 

 Pods 2-ceUed. 



Pods terete or nearly so. 

 Pods sharoly 3-angled in cross-section. 

 Pods coriaceou-s or chartaceous, if tliin-walled, not inflated. 

 Pods 2-ceUed with a perfect or nearly perfect partition. 

 Pods fleshy, indehiscent or very tardily dehiscent. 



21. Geopruimnon. 

 Pods membranoiis, leathery or woody, dehiscent. 



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



flattened, leathery or woody. 22. Astrag.\i.US. 



Pods Linear, somewhat laterally flattened, membranous. 



23. H.^IOSA. 

 Pods 1-celled, the partition, if any, rudimentary. 



Lower suture strongly intruded, making the pod sagittate or ob- 

 cordato in cross-section; pod membranous, rarely leathery. 



24. TiUM. 



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

 case woody. 

 Pods woody or chartaceous, never flattened laterally; both 

 sutxjres not prominent. 

 Pods more or less stipitato. 



Pods with two grooves on the upper side, strictly 1-ceIled. 



25. DiHOLCOS. 



Pods without grooves on the upper side, usually with a 

 partial partiton. 

 Leaves unifoliolate. 26. Jonesielia. 



Leaves odd-pinnate. 27. Rydbergiella. 



Pods sessile, usually without even a rudimentary partition. 

 Valves of the pods not winged. 



Pods with a fleshy epicarp, in fruit cross-ribbed; leaf- 

 lets obscurely articulated to the racliis, fieshy, nar- 

 row. 2S. Ctenophyllum. 

 Pods without fleshy epicarp; leaflets distinctly articu- 

 lated to the rachis. 

 Caly.x cylindrical; flowers large; plant mostly low 



and cespitose. 30. Xylophacos. 



Calyx campanulate; fiowers small. 



Corolla yellow; calyx-lobes linear-lanceolate, 

 equalling the tube; stipules united; stem 



low. 29. C>rEMID0PHACO9. 



Corolla purple; calyx -lobes triangular, much 

 shorter than the tube; stipules free or nearly 

 so; stem tall and slender. 



31. MirROPHACOS. 



Valves of the pods winged. 32. Pterophacos. 



Pods membranous, usually somewhat flattened laterally, if terete, 



both sutures prominent. 

 Partial partition present. 33. Atelephr.vgma. 



Partial parcition wanting. 



Leaflets not spinulose-tipped; pods several-seeded. 



34. HOALVLOBUS. 



Leaflets spinulose-tipped; pods 1-2-seeded. 



35. Kextrophyta. 

 Leaves digitately 3-foliolate. 



Flowers racemose. 36. Oreophaca. 



Flowers capitate (some species of). 4. Trifolium. 



Keel (lower petals) produced into a beak. 37. Aragallu.s. 



