KEY TO THE FAMILIES AND GENERA 



93 



DD. Petals 4-6 or more. 



E. Stamens in a single whorl. 



r. The petals valvate 8. Sorindeia^ 



FF. The petals imbricate. 



a. Style lateral in fr.; pedicels be- 

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

 GG. Style terminal in fr. ; pedicels not 

 plumose in fr.: Ivs. compound, 



rarely simple 10. Rhtis. 



EE. Stamens in 2 whorls, the outer alter- 

 nate with the petals; petals vai- 



vate 11. Lithrsea. 



BB. Ovary 2-5-celled. 



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



sub valvate 12. Spondms, 



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

 bricate 13. Ilarpehijl- 



[lum. 

 The genera Coryxocarpua and Smodingium are also described in 

 this Cyclopedia. 



68. CORIARIACEiE. 



The only genus Coriaria. 



69. MORINGACE^. 



The only genus Moringa. 



70. LEGUMINOSiE. 

 /, 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 

 Uttle 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 Leguminosse, p. 95.) 



Suborder I.— MIMGSE^. 



A. Fls. regular, small; calyx gamosepalous 

 or valvately parted; petals valvate, 

 often connate, below the middle. 

 B. Stamens numerous, co. 



c. The stamens free 1. Acacia Tribe. 



cc. The stamens monadelphous 2. Inga Tribe. 



SB. 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. . . . 

 CO. Anthers not glandular; stamens as 

 many as the petals, rarely twice 

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



3- or ti-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.) 



fhaseold8 



[Tribe. 

 Trifolium Tribe. 

 Galega Tribe. 



Adenanthera 



[Tribe. 



Suborder II.— PAPILIONEiE. 



B. Lvs. simple, or else digitately com- 

 pound. (Exceptions: A few mem- 

 bers of the Trifohum Tribe are 

 digitately compound and some of 

 the Phaseolus Tribe are subdigi- 

 tately compound. Some lvs. 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. Podalyria Tribe. 



cc. Stamens 10, monadelphous, rarely 

 diadeiphousf racemes terminal or 

 opposite the lvs. or the fls. soli- 

 tary or subfascicled at the axils. . 6. Genista Tribe. 

 B. Lvs. pinnate, rarely digitate in the 

 Trifolium Tribe, or subdigitate in 

 the Phaseolus Tribe or the lvs. 

 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. 



D. The pod jointed, rarely 1-jointed; 

 1-seeded by abortion. Other- 

 wise like the Lotus, Galega 

 and Phaseolus Tribes. An 



artificial division 8. Hedysarum 



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. Dalberqia 



EE. Pod dehiscent or if indehis- [Tribe. 

 cent usually of small size, 

 generally 2-vaIved. 

 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. Vici A Tribe. 



GO. Plants twining or erect, 

 not climbing by ten- 

 drils. 

 H. Lfts. generally 3. 



I. Habit of plants most- 

 ly twining 12. 



II. Habit of plants 



mostly erect 13 



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

 ., 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 out.side 

 as in aa: radicle straight, very rarely 

 slightly oblique. 



Suborder UL— C^SALPINE^. 



b. Calyx gamosepalous beyond the disk 

 or valvately parted ; lvs. simple and 

 entire or 2-lobed. or rarely cut into 

 2 lfts. : stipe of ovary free or adnate 



to caly,\-tube 15. Bauhinia Tribe. 



bb. Calyx usually parted to the very 

 disk and the segras. imbricate. 

 c. Stipe of ovary adnate to the disk- 

 bearing calyx-tube; lvs. mostly 



abruptly pinnate 16. Amherstia Tribe. 



cc. Stipe of ovary free in the bottom of 

 the calyx. 

 D. Anthers versatile: lvs. 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. Tnga. 



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 [ium 



the seeds 4. Enterolob' 



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



sickle-shaped. 

 c. Valves separating from the persistent 



sutures o. Lysiloma. 



cc. Valves elastically dehiscent and revolute 



from apex to base 6. Calliandra. 



ccc. Valves not elastic: pod often indehiscent. . 7. Albizzia 



3. Adenanthera Tribe. 



a. Fls. short-pediceled 



aa. Fls. sessile. 



B. The pod indehiscent {presumably so in 

 Stryphnodendron). 



Adenanlh- 



[era. 



