98 



KEY TO THE FAMILIES AND GENERA 



EE. Number of stamens 8 or 10: caps. 



semi-superior. 



F. Petals 0; stamens 8 or 10; fls. soli- 

 tary 23. Chryaos- 



FF. Petals entire or lobed; stamens 10; [plenium. 



fls. racemose 24. Teliimc, 



AA. Ovary 2- or 3-loculed, the placentce in the axis 

 of the f r. ; rarely composed of distinct carpels. 

 B. Stamens 5. (See also BB.) 



c. Carpels united at base, adnate to hypan- 



thium 25. SuUivantia. 



cc. Carpels united and wholly adnate to 



hypanthium 26. Suksdorfia. 



ccc. Carpels 2, united at base, free from but 



included in the inflated hypanthium.. .27. Bolandra. 

 BB. Stamens 10, rarely 8 (sometimes 5 in Boy- 



kinia). 

 c. Sepals valvate. 



D. Petals 28. Rodgersia. 



DD. Petals 5, deciduous; stamens 5 or 10.. ..29. Boykinia. 

 cc. Sepals imbricate. 



D. Styles erect; petals 5 or 0; stamens 8 



or 10 30. Astilbe. 



DD. Styles mostly recurved in fr. ; petals 5. . . 31. Saxifraga. 



The following genera also are treated: Abrophyllum, Anop- 

 terus, Bauera, Deinanthe, Leptarrhena, and Tanakfea. 



73. CUNONIACE^E. 



A. Calyx valvate. 



B. Stamens hypogynous, very long 1. Acrophyl- 



[lum. 



BB. Stamens perigynous 2. Cerato- 



[petalum. 

 AA. Calyx imbricate, the lobes very short 3. Cunonia. 



EE. Calyx-tube urn-shaped, much longer 

 t han ovary ; sepals and stamens 

 5; fls. in long and slender racemes... 5. S\nowil~ 

 BB. Petals as many as calyx-lobes. [s<m*o. 



c. Fls. borne in catkins, 5-merous. 



D. Shape of petals broad; stamens with 



long-filament ; disk present 6. Corylopsia. 



DD. Shape of petals subulate, as long as 



sepals; stamens nearly sessile ; disk 0. . 7. F&rtitnearia, 

 cc. Fls. in clusters, 4-merous. 



D. Lvs. deciduous, crcnate: anthers ob- 

 tuse, the locules opening with 1 valve. 8. Hamamelis* 

 DD. Lvs. persistent, entire: anthers beaked, 



the locules opening with 2 valves 9. Loropeta- 



AA. Ovary-locules 2- or more-ovuled. {lum* 



B. Fls. unisexual ' 10. Liquidam- 



BB. Fls. bisexual. [bar. 



c. The fls. 5, in a head, surrounded by an in- 

 volucre of which the outer bracts are 



small, the inner gradually larger 11. RhodoUia. 



cc. The fls. 2 together with very short bracts 



at the base 12. Disanthua. 



78. BRUNIACE^E. 



In cultivation Audouinin, 



(See article Diosma.; 



79. HALORAGIDACE^E. 



A. Stamens 1-2; calyx 3-4-lobed; ovary 1-loculed 1. Gunnera. 

 A A. Stamens 2-8; calyx truncate or 4-toothed; 



ovary deeply 2- or 4-grooved 2. Myrioph t/l- 



[ium. 

 AAA. Stamen 1; calyx truncate; ovary 1-loculed ... 3. Hippuris. 



74. CEPHALOTACE-ffi. 



The only genus Cephalotus. 



75. CRASSULACE^E. 



A. Stamens usually as many as the petals. 

 B. Petals free or connate only at the base; 



floral parts in 5's 



BB. Petals usually connate to the middle or 



beyond. 



c. Calyx bell-shaped, as long as the corolla- 

 tube 



cc. Calyx many times shorter than the co- 

 rolla-tube 



AA. Stamens usually twice as many as the petals. 

 B. Petals free or connate only at.the very base. 



c. Fls. usually 4~5-merous 



cc. Fls. 6-merous or more 



BB Petals usually connate to the middle or 



beyond, 

 c. Calyx large, inflated shortly 4-fid 



1. Crassula. 



2. Gramman- 



(thes. 



3. Rochea. 



cc. Calyx 4-parted . 

 ccc. Calyx 5-parted. 



4. Sedum. 



5. Semper- 



[vicum. 



6. Bryophyl- 



\lurn. 



7. KnlniK-litti . 



8. Cotyledon. 



The following are also described: Altamiranoa, Dudleya, 

 Echeveria, Kitchingia, Lenophyllum, Oliveranthus, Pachyphytum, 

 Stylophyllum, Tilhra, and Lrbinia. 



76. DROSERACE^E. 



A. Stamens 4-8; styles 2-5; placenta parietal. . . . 1. Drosera. 

 AA. Stamens about 15; style columnar; placenta: 



basal 2. Dionxa. 



AAA. Stamens 10-20; styles 5, filiform 3. Drosophyl- 



[lum. 



77. HAMAMELIDACE^E. 



A. Ovary-locules 1-ovuled. 

 B. Petals 0. 



C. Lvs. evergreen. 



D. Stamens 2-8, with long filaments; fls. in 



racemes 1. Distylium. 



DD. Stamens co , with short filaments; fls. in 

 heads; calyx-tube in the pistillate fl. 



tubular 2. Sycopsic. 



cc. Lvs. deciduous. 



D. Number of stamens about 24; fls. in 



dense spikes 3. Fothergitla, 



DD. Number of stamens 5-7. 



E. Calyx-tube not urn-shaped; sepals 

 and stamens 5-7 ; fls. in short 

 head-like racemes 4. Parrotia. 



80. RHIZOPHORACE./E. 



A. Anthers 8, subsessile 1. Rhizophora. 



A A. Anthers 15-30, on filaments 2. Cassipourea. 



81. COMBRETACE^:. 



A. Petals 0; calyx-tube not produced beyond 



ovary 1. Terminalia. 



AA. Petals 5 (0 in a few species of Combretum). 

 B. Calyx-tube straight, constricted above 

 ovary. 



c. Cotyledons convolute 2. Poivrea. 



cc. Cotyledons deeply furrowed or twisted 



and plaited 3. Combretum. 



BB. Calyx-tube produced to a great length be- 

 yond the ovary 4. Quisqualis. 



82. MYRTACE.E. 



A. Ovary 1-loculed 1. Thrypto- 



AA. Ovaiy 2- or more-loculed. [mene. 



B. Fr. a caps., which is loculicidally dehiscent 

 at apex, rarely 1-2-seeded and sub- 

 indehiscent. 



c. Anthers basifixed 2. Calotham- 



cc. Anthers versatile. [nus. 



D. Individual fls. pedicelled. 



E. Stamens 5-adelphous 3. Tristania. 



EE. Stamens free. 



F. Fls. in globose heads 4. Syncarpia. 



FF. Fls. in forking cymes 5. Metrosid- 



DD. Individual fls. not pedicelled. [ero*. 



E. Fls. solitary in the axils of the floral 



Ivs. or bracts. 

 F. Stamens distinct, not longer than 



petals 6. Leptosper- 



[mum. 



FF. Stamens distinct, long-exscrted.. . . 7. Callistemon. 

 FFF. Stamens united in clusters, long- 



exserted 8. Afelaleuca. 



EE. Fls, in cymose or umbellate heads. 



F. Petals distinct 9. Angophora. 



FF. Petals wanting (or adnate to the 



calyx-lid) 10. Eucalyptus, 



BB. Fr. a berry or rarely an indehiscent drupe: 



Ivs. opposite, punctate. 

 c. Stamens straightish in the bud: seeds 



with endosperm 11. Feijoa, 



cc. Stamens inflexed or involute in the bud: 



seeds without endosperm. 

 D. Calyx-limb closed in bud, deeply 



divided in anthesis 12. Psidium. 



DD. Calyx 4-5-lobed or -parted in the bud, 

 not cut deeper in antheses. 



