94 



KEY TO THE FAMILIES AND GENERA 



c. Pod straight, thick-compressed, trans- 

 vercely septate inside between the 



seeds 9. Stryphno- 



cc. Pod straight, falcate or variously twisted, \dendron. 



thick-compressed or subterete, usually 



septate inside between the seeds 10. Prosopis. 



BB. The pods 2-valved. (See also BBB.) 



c. Pod straight or arched, flat ; valves entire, 



continuous within: shrubs or trees 11. Piptadenia. 



cc. Pod obliquely oblong, deflexed from the 

 stipe: herbs or diffuse sub-shrubs, pros- 

 trate or floating 12. Neptunia. 



BBB. The pod fiat, with thickened persistent 

 continuous sutures, the valves trans- 

 versely jointed between the sutures, the 

 joints 1-seeded 13. Entada 



4. Mimosa Tribe. 



A. Pods provided with a replum, i. e., a frame- 

 like placenta, which remains after the 

 valves have fallen away from it. 



B. Valves wider than replum 14. Mimosa. 



BB. Valves narrower than the replum or hardly 



wider 15. Sckrankia, 



AA. Pods 2-valved in the ordinary fashion 16. Leucsena. 



5. Podalyria Tribe. 



A. Keel-petals free or slightly connate: foliage 

 herbaceous. 



B. Pod linear or oblong-inflated 17. Thermopsis. 



in 1 . Pod globose or ovoid, turgid or inflated 18. Baptisia. 



AA. Keel-petals connate on the back: foliage 



mostly leathery. 

 B. Ovules 4 or more. 



c. Keel about as long as the wings 10. Oxylobium. 



cc. Keel much shorter than wings 20. Chorizema. 



BB. Ovules 2. 



c. Pod indehiscent: calyx shortly 5-toothed.. 21. Viminaria. 

 CC. Pod 2-valved: calyx 5-fid, or bilabiate 22. Pultenxa. 



6. Genista Tribe. 



A. Stamens coalesced into a sheath which is split 



above the middle. 

 B. Seeds strophiolate. 



c. Lvs. simple or reduced to mere scales 23. Temple- 



[tonia. 



cc. Lvs. pinnate; Ifts. 3 24 Goodia. 



BB. Seeds not strophiolate 25. Crotalaria. 



AA. Stamens coalesced into a closed tube. 

 B. Seeds not strophiolate. 



c. Calyx-lobes or lips much longer than the 



tube 26. Lupinus. 



CC. Calyx-lobes or -teeth shorter than the 



tube, rarely somewhat longer. 

 D. Lfts. 3. 



E. Pod stalked 27. Laburnum. 



EE. Pod sessile. 



F. Claws of petals adnate to stam- 



inal tube 28. Petteria. 



FF. Claws of petals free. 



o. Shrubs unarmed: upper calyx- 

 lobes distinct 29. Adenocar- 



GG. Shrubs usually spinescent: calyx [pus. 



short, truncate 30. Calycotome. 



DD. Lfts. usually all wanting, rarely 3 or 1: 

 shrubs with spiny or rush-like 

 branches. 



E. Shrub with rush-like branches 31. Spartium, 



EE. Shrubs spiny or unarmed: Ifts. re- 

 duced to 1 or 0, rarely 3. 



F. Fls. yellow; calyx not inflated 32. Genista. 



FF. Fls. violet or bluish; calyx inflated : 



spiny shrub 33. Erinacta. 



BB. Seeds strophiolate. 



c. Calyx colored, 2-parted; the upper segms. 

 2-toothed, lower 3-toothed: leafless 

 shrubs, the branchlets and petioles 



transformed into spines 34. Ulex. 



CC. Calyx with the 2 upper lobes or teeth con- 

 nate or free, the 3 lower connate into a 

 lower lip 35. Cytisut. 



7. Sophora Tribe. 



A. Fl. with petals all nearly alike 36. Cadia. 



AA. Fl. distinctly papilionaceous. 



B. Pod 2-valved 37. Castano- 



BB. Pod indehiscent or at most tardily dehiscent [spermum. 



to a slight extent. 



C. The pod moniliform 38. Sophora. 



cc. The pod not moniliform, linear. 



D. Color of fls. yellow in axillary racemes . . 39. Calpurnia. 

 DD. Color of fls. white, panicled. 



E. Winter-buds inclosed in the base of 

 the enlarged petiole: panicle loose, 



drooping 40. Cladrastis. 



EE. Winter-buds free: panicle dense, 



upright 41. Maackia. 



8. Hedysarum Tribe. 



A. Stamens all free among themselves 42. Adesmia. 



AA. Stamens all connate in a closed tube 43. Arachis. 



AAA. Stamens nearest the standard free or connate 

 with the others only at the base or at the 

 middle. 



B, Filaments all dilated above or only alter- 

 nate ones. 



c. Keel obtuse 44. Ornithopus, 



cc. Keel acute or beaked 45. CoroniUa. 



BB. Filaments normal. 



c. Wings short or very short, rarely as long 

 as the keel: Ifts. not provided with 

 minute stipules. 

 D. Pod flat or compressed. 



E. Joints many, rarely 2: standard-sta- 

 men free 46. Hedysarum. 



EE. Joints 2: standard -stamen connate 



with others at middle 47. Onobrychia. 



DD. Pod thickish, subterete 48. Alhagi. 



cc. Wings as long as or longer than the keel: 

 partial petioles of Ifts. bear minute 

 stipules (except in Lespedeza 0). 

 D. Pod indehiscent, rarely opening at the 



lower suture; joints flat 49. Desrnodium. 



DD. Pod of about 4 small, distinct, 1-seeded, 

 smooth, veined joints included in 



the calyx 50. Uraria. 



DDD. Pod 1-seeded, indehiscent; no joints. . . .51. Lespedeza. 



9. Dalbergia Tribe. 



A. Fr. drupaceous, globose or ovoid, indehiscent, 



the endocarp woody 52. Andira. 



AA. Fr. not drupaceous. 

 B. Lfts. mostly alternate. 



c. Anthers versatile, the locules parallel, 



longitudinally dehiscent 53. Tipuana. 



cc. Anthers small, erect, didymous, the 

 locules placed back to back; generally 



dehiscent at apex by a short crack 54. Dalbergia. 



BB. Lfts. opposite. 



c. Pod longitudinally 4-winged 55. Piscidia. 



cc. Pod with a narrow wing along the upper 



suture or both sutures 56. Derris. 



10. Lotus Tribe. 



A. Pod indehiscent or tardily 2-valved 57. Anthyllis. 



AA. Pod 2-valved. 



B. Calyx -lobes usually longer than tube; keel 



rostrate 58. Lotus. 



BB. Calyx-teeth shorter than tube ; keel obtuse . . 59. Hosackia. 



11. Vicia Tribe. 



A. St. woody: infl. subterminal ; stamens 9, the 



standard-stamen absent 60. Abrua. 



AA. St. herbaceous: fls. solitary or racemose in the 

 axils; stamens 10. 



B. Wings adherent to the keel 61. Lens. 



(See article Lentil.) 

 BB. Wings free or only slightly adherent. 



c. Sheath of stamens oblique at the mouth; 

 style slender, bearded or hairy only at 

 the apex or all around the upper part. . .62. Vicia. 

 cc. Sheath of stamens equal at the mouth. 

 D. Calyx-lobes leafy; style rigid, dilated 

 above and the margins reflexed and 

 joined together so that it becomes 

 flattened laterally; bearded down the 



inner edge 63. Pisum. 



DD. Calyx-lobes not leafy; style flattened 

 above on the back and front ; bearded 

 down one face 64. Lathyrus. 



12. Phaseolus Tribe. 



A. Style longitudinally bearded above on the 

 inner side or rarely pilose only around the 

 stigma; petals normal or the keel long- 

 beaked or spiral: infl. nodose-racemose. 

 B. Calyx-tube not longer than lobe, 



c. Keel spiral 65. Phaseolus. 



cc. Keel obtuse or arched beaked. 



D. Stigma strongly oblique or introrse 66. Vigna. 



DD. Stigma subglobose on inner face; style 



flattened out at apex 67. Pachyrhizus* 



DDD. Stigma small, terminal; style filiform 



or subulate at apex 68. Dolichos. 



BB. Calyx-tube cylindrical, longer than lobes. ...69. Clitoria. 

 AA. Style not bearded. 



B. Standard-stamen free only at the very base, 

 thence connate with the rest into a closed 

 tube; calyx mostly 4-lobed. 

 c. Calyx bell-shaped. 



D. Pod broad, the upper suture thickened 



or 2-winged 70. Bioclta. 



DD. Pod linear, narrow or flat 71. Puerarto. 



