108 



KEY TO THE FAMILIES AND GENERA 



EE. Ovary hemispherical or top-shaped. 



F. Anthers connate in a tube 14. Symphyan- 



FF. Anthers not connate in a tube. [dra. 

 Q. Style girt at base by an epigyn- 

 oua fleshy disk, which is cup- 

 shaped or tubular 15. Adenophora. 



GO. Style without such disk. 



H. Corolla 5-parted to the base; 

 lobes narrow, either long- 

 cohering above or rotate- 

 spreading 16. Phyteuma. 



HH. Corolla 5-cut shortly or to the 

 middle, rarely farther, bell- 

 shaped, tubular, funnel- 

 shaped or subrotate 17. Campanula. 



DD. Corolla narrowly tubular, shortly 



3-cut at apex 18. Trachelium. 



ODD. Corolla usually 7-10-cut, rarely 5-cut. 

 E. Number of lobes 5-9, usually 7; fls. 



bell-shaped 19. Ostrowskia. 



EE. Number of lobes 8-10, lobes narrow 



and spreading 20. Michauxia. 



Githopsis, Leptocodon and Lightfootia are also mentioned in the 

 Cyclopedia. 



108. MONOTROPACE^E. 



In cultivation . . Sarcodes. 



109. CLETHRACE.ffi. 



The only genus .............................. Clethra. 



110. PYROLACEJE. 



A. Style very short, obconical: ats. leafy ........ 1. Chimapkila. 



A A. Style mostly elongated; scape naked or leafy 



only at base. 

 B. Fls. solitary ............................ 2. Montses. 



BB. Fls. racemose ........................... 3. Pyrola. 



111. ERICACEAE (Inc. Vacciniacess). 



Subfamily 1. VACCINIEJE. 



drupe. 



Ovary inferior: fr. a berry or 



Subfamily 2. ERICINE&. Ovary superior: fr. a caps., except 

 in Tribe 1 of Subfamily 2. 



Fr. fleshy, a berry or drupe .............. 1. ARBUTUS TRIBE. 



Fr. a loculicidal caps., chiefly 5-celled: 



corolla deciduous .................... 2. ANDROMEDATRIBE. 



Fr. a caps., with loculicidal or sometimes 



septicidal dehiscent and 4 or 5 cells: 



corolla marcescent peristent ........... 3. ERICA TRIBE. 



Fr. a septicidal caps.: corolla deciduous ... 4. RHODODENDRON 



[TRIBE. 



Subfamily 1. VACCINIEJE. 



A. Corolla tubular or cylindric; filaments con- 



nate or free. 

 B. Filaments connate or cohering; anthers pro- 



duced into a single long beak. 

 c. Stamens shorter than corolla ............ 1. \facleania. 



cc. Stamens equaling or exceeding the corolla. 2. Thibaudia. 

 BB. Filaments distinct; anthers ending in 2 long 



beaks ................................ 3. Agapftes. 



AA. Corolla campanulate, urceolate or rotate; 



filaments usually free. 

 B. The ovary wholly inferior. 



c. Ovary 10-celled, 10-ovuled ............. 4. Gaylussacia. 



cc. Ovary 4-5-celled, or by false partitions 

 from the back of these cells, 8-10-celled; 

 ovules numerous .................... 5. Vactinium. 



BB. The ovary at first a third to half superior.. . . 6. Ckiogenes. 



Subfamily 2. ERICINEJE. 

 1. Arbutus Tribe. 



A. The anthers have a pair of awns on the back. 

 B. Ovary-cell many-ovuled .................. 7. Arbutus. 



BB. Ovary-cells 1-ovuled. 



c. Nutlets coalescent : 1 vs. persistent, entire.. 8. Arctos- 



[taphylos. 



cc. Nutlets distinct: Ivs. deciduous, serrate. . . 9. Arctous, 

 AA. The anthers awnless on back ............... 10. Pernettya. 



2. Andromeda Tribe. 



A. Anther-cells opening through their whole 

 length, not appendaged; stigma 5-Iobed, the 

 lobes ad n ate to a surrounding ring or cup ..... 11. Epign-a. 



AA. Anthers opening only at the top; stigma usu- 

 ally entire. 

 B. Calyx becoming fleshy in fr., forming a 



berry and inclosing the small caps 12. Gtiultheria. 



BB. Calyx unchanged and dry under the caps. 

 c. Sepals or calyx-lobes valvate or open in 



the bud, never overlapping. 

 D. The anthers destitute of appendages 



or awns 13. Lyonia. 



DD. The anthers awned. 



E. The anthers short and obtuse, with 2 

 pores topped by slender, ascending 



awns; corolla urn-shaped 14. Andromeda, 



EE. Anthers lanceolate, produced into 2 

 small tubes, each surmounted by a 

 pair of slender, ascending awns; 



corolla bell-shaped 15. Zenobia. 



EEE. Anthers with 2 spreading or defiexed 

 awns or teeth, on the back of the 

 filament or at its junction with the 



anther 16. Pieris. 



cc. Sepals or calyx-lobes imbricated, at least 



in the early bud. 



D, Lvs. heath-like, small, thick or needle- 

 like, mostly overlapping: anther 



fixed near apex 17. Cassiope. 



DD. Lvs. not heath-like, usually larger, fiat, 



broad and leathery. 



E. Corolla cylindraceous to contcal- 

 urceolate; anthers fixed near base. 



F. Seeds imbricated in 2 rows 18. Chamae- 



FF. Seeds pendulous or in all direc- [daphne. 



tions 19. Leucothoe. 



FFF. Seeds all ascending or erect 20. Oxyden- 



[drum. 

 EE. Corolla bell-shaped or urn-shaped. . . .21. Enkianthus. 



3. Erica Tribe. 



A. Anthers 2-awned on back at base 22. Cattuna. 



AA. Anthers 2-parted, blunt or awned, usually 



cristate or lamellate at base 23. Erica. 



AAA. Anthers blunt on back, not cristate 24. Bntcken- 



[thalia 



4. Rhododendron Tribe. 



A. Corolla polypetalous or nearly so. 



B. Fls. in elongated racemes or panicles: Ivs. 

 deciduous. 



c. Petals 4; stamens 8 25. Elliottia. 



cc. Petals 3; stamens 6 26. Tripetaleia. 



BB. Fls. solitary; petals 5; stamens 10: Ivs. 



deciduous 27. Cladothnm- 



BBB. Fls. in umbel-like racemes; petals 5; stamens [nu*. 



5-10: Ivs. evergreen. 

 c. Lvs. tomentose below: caps. 5-celled; 



seeds winged 28. Ledum. 



cc. Lvs. glabrous: caps. 2-3-celled; seeds 



angular 29. Leiophyllum. 



AA. Corolla gamopetalous. 



B. Seeds compressed, winged: corolla slightly 



irregular; stamens 5-10. 

 c. Stamens usually cxserted; anthers open- 

 ing by a round terminal pore; corolla 



rotate, campanulate or funnelfonn 30. Rfiododen- 



cc. Stamens included; anthers opening by an [dron. 



oblique pore ; corolla urceolate : Ivs. 



deciduous 31. Memiesia. 



BB. Seeds subglobose or trigonous, not winged: 



corolla regular. 

 c. Stamens 10. 



D. The corolla cup-shaped with 10 pouches 

 receiving the anthers; fls. in corymbs 



or solitary 32. Kalmia. 



DD. The corolla rotate; fls. terminal, 1-3: 



Ivs. oblong-elliptic, ciliate 33. Rhodo- 



DDD. The corolla urceolate or campanulate; [thamnus. 



fls. terminal, solitary or in umbels: 



Ivs. heath-like 34. Phyllodoce. 



cc. Stamens 5 or 8. 



D. Fls. 5-merous, in umbels, 2-5; corolla 

 broadly funnelform: Ivs. elliptic, op- 

 posite, smooth 35. Loiseleuria. 



DD. Fls. 4-merous: Ivs. alternate. 



E. Corolla rotate, 4-parted; fls. 2-10, in 



loose racemes: Ivs. heath-like 3G. Bryanthus. 



EE. Corolla campanulatc-urccolate with 

 short 4-toothed limb; fls. in loose 

 racemes: Ivs. tomentose below 37. Dabcetia. 



The genus Pentapterygmm is included in the work. 



112. EPACRIDACEJE. 



Style inserted in the intruded vertex of the ovary; 

 stamens epipetalous; anthers 1 -celled; corolla- 

 lobes quincunciately imbricate; bracts numer- 

 ous, passing into sepals Epacris. 



The recent genus Rupicola is also mentioned in the work. 



