86 



KEY TO THE FAMILIES AND GENERA 



PART II. KEY TO THE GENERA 



1. RANUNCULACE^E. 



A. Sepals usually valvate: Ivs. opposite 1. Clematis. 



AA. Sepals imbricate. 



B. Carpels 1-ovuled: fr. an indehiscent aohene. 

 c. Ovule pendulous; raphe dorsal. 



D. Petals conspicuous 2. Adonis. 



DD. Petals 0, or very small. 



E. Fls. not subtended by involucres... . 3. Thalictrum. 

 EE. Fls. subtended by involucres remote 

 from the calyx or close under it. 



r. Involucre remote from calyx 4. Anemone. 



n . Involucre of 3 simple, sessile Ivs. 



closer under the n 5. Hepatica. 



FFF. Involucre of 3 compound sessile 



Ivs 6. Syndesmon. 



cc. Ovules ascending. 



D. Petals wanting 7. TraiUvet- 



[teria. 



DD. Petals 3 to many 8. Ranunculus. 



BB. Carpels several- or many-ovuled: fr. usually 

 dehiscent at maturity, rarely berry-like. 



c. Petals large and showy 9. Pxonia. 



cc. Petals medium small, deformed, or 0. 

 D. Fls. irregular. 



E. Posterior sepal forms a spur 10. Delphinium. 



EE. Posterior sepal forms a hood 11. Aconitum. 



DD. Fls. regular. 

 E. Infl. racemose. 



F. Stamens 5 or 10: shrubs 12. Xanthorrh- 



FF. Stamens numerous: herbs. [izn. 



a. Fr. a berry 13. Actsea. 



GO. Fr. consisting of follicles, dehis- 

 cent 14. Cimicifuga. 



EE. Infl, paniculate, or fls. solitary. 



F. Lvs. pal mat el y veined or cut; not 



ternate. 

 a. Petals wanting. 



H. Ovules many, in 2 series 



along the ventral suture. . . . 15. Caltha. 



HH. Ovules only 2 16. Hydrasti*. 



GO. Petals small or narrow; mostly 



nectar-bearing. 



H. Sepals commonly deciduous; 

 petals not 2-lipped, nor 



scale-bearing 17. TroUius. 



HH. Sepals persistent; broad petals 



2-lipped or bearing a scale ... 18. Ifelleborus. 

 HHH. Sepals deciduous, narrow; 



petals bearing a scale 19. Eranthis. 



FF. Lvs. ternately or subpinnately de- 

 compound. 

 G. Sepals 5-6. 



H. Petals spurred 20, Aquilegia. 



HH. Petals not spurred; often 



small or 0. 

 i. The carpels connate at the 



base or higher 21. Nigella. 



n. The carpels free. 



j. Carpels stalked 22. Coptis. 



jj. Carpels not stalked 23. Isopyrum. 



GO. Sepals and petals numerous 24. Anemonop- 



[sis. 

 The genus Callianthemum is also in cultivation. 



2. DILLENIACEJE. 



A. Anthers adnate, linear: carpels 5-20, partly 



connate: upright trees or shrubs 1. DiUenia. 



AA. Anthers oblong or rarely orbicular, the cells 



parallel and contiguous 2. Hibbertia. 



AAA. Anthers versatile, emarginate at the base; 

 carpels completely connate: fr. a berry: 

 twining shrubs. 



B. Stamens and carpels : winter-buds in- 

 closed in the swollen base of the petiole. . .. 3. Actinidia. 



BB. Stamens 10: carpels 5: winter-buds free 4. Clemato- 



[clethra. 



3. CALYCANTHACE^E. 



A. Stamens 10- : all sepals brownish red 1. Calycanthus. 



AA. Stamens 5 : outer sepals white, inner purple ... 2. Meratia. 



4. MAGNOLIACE^E, 



cc. Stipules present, inclosing young Ivs. in 

 the bud. 



D. Anthers face out 2. Lirioden- 



DD. Anthers face in. [dron, 



E. Structure bearing the carpels stalked. 3. Michelia. 

 EE. Structure bearing the carpels sessile. 



F. Dehiscence of carpel circumscissle. 4. Talauma. 



FF. Dehiscence 2-valved 5. Magnolia. 



BB. Fls. unisexual: twining shrubs. 



c. Carpels after anthesis spicate 6. Schizandra, 



cc. Carpels after anthesis globose-capitate... . 7. Kadsura. 

 LA. Stamens 4: perianth-segms. 4; fls. in slender 



spikes, small: Ivs. palminerved: tree 8. Tetractn- 



[tron. 

 Members of the genus Drimys are sometimes cultivated. 



5. TROCHODENDRACE.ffi. 



A. Carpels 5-8, sessile, with many seeds: fls. per- 



fect : evergreen tree . f 1 



AA. Carpels , stipitate, developing into winged 

 nutlets with 1 or few seeds: fls. polygamous: 

 deciduous tree 2. Euptelea. 



Trochoden- 



[dron. 



6. CERCIDIPHYLLACEJE. 



The only genus Cercidiphyllum, 



7. EUCOMMIACE.E. 



The only genus Eucommia. 



8. ANNONACE.E. 



A. Fr. an aggregation of many carpels closely 

 crowdea into a spheroid or ovoid mase; 

 ovules solitary. 



B. Carpels fused together with the receptacle 

 (torus) into a fleshy (often edible) syn- 

 carpium. 



c. Corolla gamopetalous, 3-lobed or 3- 

 spurred, almost closed, with only a mi- 

 nute opening above the stamens and 



pistils 



cc. Corolla polypetalous; petals 6 in 2 series, 

 inner series sometimes minute or even 



wanting, outer petals valvate 



BB. Carpels distinct, rigid, polygonal, becoming 

 detached from the receptacle when 

 mature; corolla polypetalous, the petals 



imbricate or overlapping 



AA. Fr. a cluster of distinct carpels, usually stip- 

 itate, never crowded so closely as to be- 

 come polygonal or prism-shaped ; ovules 

 geminate or many in 1 or 2 series. 



B. Ovules geminate, vertical, parallel 



BB. Ovules horizontal or in 2 vertical rows. 



c. Petals narrow, long, strap-shaped 



cc. Petals suborbicular to obovate-oblong. 

 D. Inner petals with their margins invo- 

 lute, ear-shaped or boat-shaped 



DD. Inner petals with margins not involute.. 



Fuseea, Unona, Uvaria, and Xylopia are also slightly in cul- 

 tivation 



1. Rollinia. 



2. Annona, 



3. Duguetia. 



4. Artabotryt. 



5. Canangium. 



QfCymbopet- 



\alum. 

 7. Asimina. 



A. Stamens co : perianth-segms. 6-. 

 B. Fls. bisexual: upright trees or shrubs. 

 c. Stipules 



1. Illicium. 



9. MENISPERMACE^E. 



A. Filaments coalesced into a column which is 

 subpeltate at apex. 



B. Sepals 6; petals 1. Anamirta. 



(See article Cocculus.) 

 BB, Sepals 4; petals grown together, making a 



small cup 2. Cissampelos. 



AA. Filaments free, either at base or apex. 

 B. Stamens 9-20. 



c. Sepals and petals 6, in whorls; stamens 



9-12 3. Sinomen- 



cc. Sepals and petals irregularly arranged; (turn. 



sepals 4-10; petals 6-9; stamens 12-24... 4. Menisper- 

 BB. Stamens 6. [mum. 



c. Petals 6, shorter than sepals, stamens 



high-monadelphous 5. Cocculus. 



cc. Petals 0, unless the 3 inner and larger se- 

 pals are regarded as petals; outer sta- 

 mens free 6. Abuia. 



Calyocarpum and Jatrorrhiza are sometimes cultivated. 



