KEY TO THE FAMILIES AND GENERA 



93 



DD. Petals 4-6 or more. 



E. Stamens in a single whorl. 



T. The petals yalvate 8. Sorindeia. 



FF. The petals imbricate. 



G. Style lateral in fr.; pedicels be- 

 coming plumose: Ivs. simple. . . 9. Cotinus. 

 GG. Style terminal in f r. ; pedicels not 

 plumose in fr.: Ivs. compound, 



rarely simple 10. Rhus. 



EE. Stamens in 2 whorls, the outer alter- 

 nate with the petals; petals val- 



vate 11. Lithrsea. 



BB. Ovary 2-5-celled. 



c. Fls. polygamous; stamens 8-10; petals 



subvalvate 12. Spondias. 



cc. Fls. dicecious; stamens 8-9; petals im- 

 bricate 13. Harpehul- 



[lum. 



The genera Coryxocarpus and Smodingium are also described in 

 this Cyclopedia. 



68. CORIARIACE^E. 



The only genus . . 



The only genus. . 



69. MORINGACE^. 



Coriaria, 



Morinoa, 



70. LEGUMINOS^E. 



D. The pod jointed, rarely 1-jointed; 

 1-eeeded by abortion. Other- 

 wise like the Lotus, Galega 

 and Phaseolus Tribes. An 



artificial division 8. HEDYBAHUM 



DD. The pod not jointed. [TRIBE. 



E. Pod indehiscent, larger than 

 calyx, membranous, leath- 

 ery, woody or drupaceous: 

 Ifts. 5 or more, rarely 3-1: 

 trees or tall shrubs or 



climbers 9. DALBEROIA 



EE. Pod dehiscent or if indehis- [TRIBE, 

 cent usually of small size, 

 generally 2-valved. 

 F. Fls. in heads or umbels, 

 rarely solitary: Ifts. 3 or 

 more, entire : alternate 

 filaments usually dilated 

 at the apex: herbs or sub- 

 shrubs 10. LOTUS TRIBE. 



FF. Fls. solitary or racemose, 

 sometimes panicled or 

 fascicled. 



G. Plants typically climbing 

 herbs, raising them- 

 selves by means of 

 tendrils at the tips of 

 the petioles: some- 

 times there is a mere 

 bristle: Ifts. often den- 

 ticulate at apex 11. VICIA TRIBE. 



GO. Plants twining or erect, 

 not climbing by ten- 

 drils. 



H. Lfts. generally 3. 

 i. Habit of plants most- 



/. Summary of Suborders and Tribes. 



Ignoring exceptions and six tribes of which no examples 

 appear to be cult, in America. (Other genera of Leguminosse 

 may be met with now and then in cultivation, but they are so 

 little grown and so many that the introduction of them here would 

 make the key unnecessarily complicated; some of these are men- 

 tioned at the end of the Leguminosae, p. 95.) 



Suborder I. MIMOSE^E. 



A. Fls. regular, small; calyx ganaosepalous 

 or valvately parted; petals valvate, 

 often connate, below the middle. 

 B. Stamens numerous, . 



c. The stamens free 1. ACACIA TRIBE. 



cc. The stamens monadelphous 2. IMOA TRIBE. 



BB. Stamens fewer, definite. 



c. Anthers usually appendaged with a 

 stalked gland; stamens twice as 

 many as the petals, rarely as 

 many: fls. generally 5-merous. ... 3. ADENANTHERA 

 cc. Anthers not glandular; stamens as (TRIBE, 



many as the petals, rarely twice 

 as many: fls. 4-5-merous, rarely 



3- or 6-merous 4. MIMOSA TRIBE. 



AA. Fls. irregular and truly papilionaceous, 

 i. e., like a sweet pea, the standard 

 outside of the other petals and inclos- 

 ing them in the bud; sepals more or 

 less united above the disk into a 

 tube or cup; radicles inflexed, accum- 

 bent or rarely very short and straight. 

 (Compare AAA. ) 



Suborder II. PAPILIONE4B. 



B. Lvs. simple, or else digitately com- 

 pound. (Exceptions: A few mem- 

 bers of the Trifolium Tribe are 

 digitately compound and some of 

 the Phaseolus Tribe are subdigi- 

 tately compound. Some Ivs. that 

 appear to be simple have been re- 

 duced from several Ifts. to 1, gener- 

 ally leaving a gland, joint or other 

 indication of the reduction.) 

 c. Stamens 10, free: shrubs, rarely 



herbs 5. PODALYHIA TRIBE. 



cc. Stamens 10, monadelphous, rarely 

 diadelphous: racemes terminal or 

 opposite the Ivs. or the fls. soli- 

 tary or subfascicled at the axils. . 6. GENISTA TRIBE. 

 BB. Lvs. pinnate, rarely digitate in the 

 Trifoliura Tribe, or subdigitate in 

 the Phaseolus Tribe or the Ivs. 

 sometimes reduced to a single 1ft. 

 C. Stamens 10, free: Ifts. 5 or more, 

 sometimes reduced to 1 large 



1ft., rarely 3 7. SOPHORA TRIBE. 



cc. Stamens monadelphous or diadel- 

 phous. 



ly twining 12. 



:i. Habit of plants 



PHASEOLUS 



[TRIBE. 



THIFOLIUM TRIBE. 

 GALEGA TRIBE. 



mostly erect 13. 



HH. Lfts. mostly 5 or more.. 14. 

 AAA. Fls. more or less irregular, but not 

 truly papilionaceous. When they 

 seem to be so, the petal answering 

 to the standard will be found within 

 the other petals instead of outside 

 as in AA: radicle straight, very rarely 

 slightly oblique. 



Suborder m. CISALPINE M. 



B. Calyx gamosepalous beyond the disk 

 or valvately parted : Ivs. simple and 

 entire or 2-lobed, or rarely cut into 

 2 Ifts. : stipe of ovary free or adnate 



to calyx-tube 15. BAUHINIA TRIBE. 



BB. Calyx usually parted to the very 



disk and the segms. imbricate. 

 c. Stipe of ovary adnate to the disk- 

 bearing calyx-tube: Ivs. mostly 



abruptly pinnate 16. AMHERSTIA TRIBE. 



cc. Stipe of ovary free in the bottom of 



the calyx. 

 D. Anthers versatile: Ivs. mostly 



bipinnate 17. C-ESALPINIA TRIBE. 



DD. Anthers basifixed, erect but 

 longitudinally dehiscent by 2 

 pores or short cracks 18. CASSIA TRIBE. 



//. Key to the Tribes. 



1. Acacia Tribe. 

 The only genus 1. Acacia. 



2. Inga Tribe. 



A. Lvs. once pinnate 2. Inga. 



AA. Lvs. mostly twice pinnate. 



B. Shape of pods circinate, arched or variously 



twisted, 

 c. Pod usually 2-valved; seeds generally 



surrounded by a thin pulp 3. Pithecolob- 



cc. Pod indehiscent, usually septate between [mm. 



the seeds 4. Enterolob- 



BB. Shape of pods straight, or at most slightly [ium. 



sickle-shaped, 

 c. Valves separating from the persistent 



sutures 5. Lysiloma. 



cc. Valves elastically dehiscent and revolute 



from apex to base 6. Calliandra. 



ccc. Valves not elastic: pod of ten indehiscent. . 7. Albizzia 



3. Adenanthera Tribe. 



A. Fls. short-pediceled 8. Adenantk- 



AA. Fls. sessile. [era. 



B. The pod indehiscent (presumably so in 

 Stryphnodendron). 



