S6 



KEY TO THE FAIMILIES AND GENERA 



PART II.— KEY TO THE GENERA 



I. RANUNCULACEiE. 



A. Sepals usually valvate: U'a. opposite 1. Clenialis. 



\A. Sepals imbricate. 



B. C-arpols 1-oviiKxl: fr. an indchisceut achene. 

 c. Ovule pt'iidulous; raphe dorsal. 



D. Pelals conspicuou;! 2. Adonis. 



DD. PetaU 0. or very small. 



E. FIs. not subtended by involucres... . 3. Thalictntm. 

 EE. FIs. subtendcil by involucres remote 

 from the calyx or close \inder it. 



F. Involucre remote from calyx -1. Anemone. 



FF. Involucre of 3 simple, sessile Ivs. 



closer under the fl 5. Ilepatica. 



FFF. Involucre of 3 compound sessile 



Ivs G. Sytuiesmon. 



cc. Ovules ascending. 



o. Petals wanting 7. Trmitvet- 



[teria. 



DD. Pelals 3 to many 8. Ranunculus. 



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

 dehiscent at maturity, rarely berry-like. 



c. Petals large and sh(»tt-y 9. Pxonia. 



CC. Petals medium small, deformed, or 0. 

 D. FIs. irregular. 



E. Posterior sepal form* a spur 10. Delphinium. 



EE. Posterior sepal forms a hood 11. Aconitum. 



DD. FIs. regular. 



E. Infl. racemose. 



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



FF. Stamens numerous: herbs. [iza. 



o. Fr. a berry 13. Acta'a. 



GO. Fr. consisting of follicles, dehis- 

 cent H. Cimicifuga. 



£E. Infl. paniculate, or fls. solitary. 



F. Lvs. palmatcly veined or cut; not 

 tcrnate. 

 o. Petals wanting. 



H. Ovules many, in 2 series 



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



HH. Ovules only 2 , 10. Hydrastis. 



QQ. Petals small or narrow; mostly 

 nectar-bearing. 

 H. Sepals commonly deciduous; 

 petals not 2-lipped, nor 



scale-bearing 17. TrolUus. 



HH. Sepals persistent; broad petals 



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

 HHH. Sepals deciduous, narrow; 



petals bearing a scale 19. Eranthis. 



FF. Lvs. ternately or subpinnately de- 

 compound. 

 O. 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. 



II. The carpels free. 



J. Carpels stalked 22. Coptis. 



jj. Carpels not stalked 23. Isopyrum. 



ao. Sepals and petals numerous 24. Anemonop- 



[sis. 

 The genus Callianthemum is also in cultivation. 



2. DILLENIACE^. 



A. Anthers adnate, linear; nurpcl.-. j-20, partly 



connate: upright trees oi shrubs 1. Dillenia. 



AA. .Anthers oblong or rarely orbicular, the cells 



parallel and contiguous 2. Hibhertia. 



AAA. Anthers versatile, emarginate at the base; 

 carpels completely connate: fr. a berry: 

 twiaing shniuH. 

 B. .Stamens and carpels <^' winter-buds in- 

 closed in the swollen baseof the petiole. . .. 3. 

 BB. Stamens 10: carpels 5: winter-buus free 4 



Actinidia, 

 C'lemuto- 



[clethra. 



3. CALYCANTHACE^. 



\. Stameoit lO-oo :all sepaU browiii.sh red 



4A. StamcDs 5 : outer HCpals white, inner purple . . 



4. MAGNOLIACEiE. 



- Stamens ^ : perianth-segms. G-oo. 

 B. FI.t- blnexual: upright trees or shrubs. 

 c. Stipules 



1. Calycanlhus. 



2. Meratia. 



1. lUicium. 



cc. Stipules present, inclosing young lvs. in 

 the bud. 



D. Anther.'' face out 2. Lirioden- 



DD. .\nthers face in. [dron. 



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

 EE. Structure bearing the oarpi^ls sessile. 



F. Dehiscence of carpel circumscissle. 4. Tahiuma. 



FF. Dehiscence 2-vulved 5. Magnolia. 



BB. Fls. unisexual: twining shrubs. 



c. Carpels after anthcsis spicate 6. Schizandra. 



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

 lA. Stamens 4: perianth-segins. 4; fls. in slender 



spikes, small: lvs. palminerved: tree 8. Tetracen- 



[tron, 

 RIembors of the genus Drimys are sometimes cultivated. 



5. TROCHODENDRACE.^. 



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

 fect: evergreen tree 1. Trochoden- 



AA. Carpels co, stipitate, developing into winged [dron. 



nutlets with 1 or few seeds: fls. polygiimous: 

 deciduous tree 2. Euptelea. 



6. CERCIDIPHYLLACE^. 



The only genus Cercidiphyllum. 



7. EUCOMMIACE.ffi. 



The only genus Eucommia. 



8. ANNONACE^. 



A. Fr. an aggregation of many carpels closely 

 crowded into a spheroid or ovoid mass; 

 ovules solitary. 

 B. Carpels fused together with the receptacle 

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

 carpium. 

 C. Corolla ^atnopftaloua, 3-lobed or 3- 

 •spurred, alino-ti riosed, with only a mi- 

 nute opining tihdve the stamens and 



pistils ■ ■ • !• Rollinia, 



cc. Corolla polypetalous; petals 6 in 2 series, 

 inner series .sometimes minute or even 



wanting, outer petals valvate 2. Annona. 



BB. Carpels distinct, rigid, polygonal, becoming 

 detached from the receptacle when 

 mature; corolla polypetalous, the petals 



imbricate or overlapping 3. Duguetia. 



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 4. Artabotrys. 



BB. Ovules horizontal or in 2 vertical rows. 



c. Petals narrow, long, strap-shaped 5. Canangium. 



cc. Petals suborbicular to obovate-olilong. 

 D. Inner petals with their margins invo- 

 lute, ear-shaped or boat-shaped CrCymbopet- 



[alum. 

 DD. Inner petals with margins not involute.. 7. Asimina. 



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

 tivation 



9. MENISPERMACE^. 



A. Filaments coalesced into a column which is 

 subpeltate at apex. 



B. Sepals (»; 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 G, in whorls; stamens 



9-12 S. Sinomen- 



cc. Sepals and petals irregularly arranged; [turn. 



scpals4-10; petals 6-0; stamens 12-24... 4. Mcni.iper- 

 3B. Stamens (5. [mum 



c. Petals G, shorter than sepals, stamens 



high-monadclphous 5. Cocculus. 



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

 pals are regarded as petals; outer sta- 

 mens free 6. Abuta. 



Calyocarpum and Jatrorrhiza are sometimes cultivated. 



