lOS 



KEY TO THE FAMILIES AND GENERA 



EE, Ovar>* hemispherical or top-tiliaped. 



F. Anthers conimto in a tune 14. Symphyan- 



TF. Anthers not connato in a tube. {dra. 



o. Style girt at base by an epieyn- 

 ous fleshy disk, which is eup- 



shapeti or tubular 15. Adenophora. 



GO. Style without such lUsk. 



H. Corolla 5-partet.i to the base; 

 lobes narrow, either long- 

 coherins above or rotate- 

 spreading 16. Phyteuma. 



HB. Corolla 5-cut shortly or to the 

 middle, rarely farther, bell- 

 shaped, t ubular, funnel- 

 shaped or subrotate 17. Campanula, 



DD. Corolla narrowly tubular, shortly 



3-cut at ai>es 18. Trachelium. 



DDD. Corolla usually 7-10-cut. rarely 5-cut. 

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



bell-shaped 19. Ostrowskia. 



EK. Number of lobes S-10, lobes narrow 



and spreading 20. Michauxia 



Githopaia, Leptocodon and Lightfootia are also mentioned in the 

 Cyclopedia. 



108. MONOTROPACEiE. 



in cultivation. 



Sarcodes. 



109. CLETHRACE^. 

 The only genus CUthra. 



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. GauUheria, 



BB. Calyx vmehanged 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. Tlie 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 deflexed 

 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-Uke, small, thick or needle- 

 like, mostly overlapping: anther 



fixed near apex 17. Cassiope, 



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

 broad and leathery. 

 E. Corolla cylindraceoua to conical- 

 urceolate; anthers fixed near base. 



F. Seeds imbricated in 2 rows 18. Ckamae- 



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



tions 19. LeucotkoS. 



FFF. Seeds all ascending or erect 20. Oxyden- 



[drum, 

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



110. PYROLACE.^. 



A. Style verj' short, obconical: sts. leafy 1. Chimaphila. 



AA. Style mostly elongated; scape naked or leafy 

 only at base. 



B. Fls. solitary 2. Moneses. 



BB. Fls. racemose 3. Pyrola. 



111. ERICACE.ffi (Inc. Vacciniaceae). 



Subfamily 1. VACCIIOE^. Ovary inferior: fr. a berry or 

 drupe. 



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



in Trilw 1 of Subfamily 2. 



Fr. fleshy, a berry or drupe 1. Arbctus Tribe. 



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



corolla deciduous 2. Andromeda Tribe. 



Fr. a caps., with loculicidal or sometimes 



septicidal dehiscent and 4 or 5 cells: 



corolla marcescent peristent 3. Erica Tribe. 



Fr. asepticidal cape.: corolla deciduous ... 4. Rhododendron 



[Tribe. 



SubfamUy 1. VACCINIE^. 



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. Macleania. 



CC- Stamensequalingorexeeeding the corolla. 2. Thibaudia. 

 BB. Filaments distinct; anthers ending in 2 long 



beaks 3. Agapetes. 



AA. Corolla campanulate, urceolate or rotate; 

 filaments usually free. 

 B. The ovary wholly inferior. 



c. Ovary lO-cclIed, 10-ovuled 4. Gaylussacia. 



CO. Ovary 4-5-ceIied. or by faUe partitions 

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



ovules numerous 5. Vaccinium. 



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



Subfamily 2. ERICINEJE. 



1. Arbutus Tribe. 



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



B. Ovary-cell many-o\Tiled 7. ArbuittB, 



BB. Ovary-r*;ll8 l-f^tviiled. 



c. Nutlet.'(Coalescent:lv8. per8istent,entire.. S. Ardos- 



\Uiphylo8, 

 CC- Nutlet* distinct: lvs. deciduous, serrate- . . 9. Ardoux. 

 AjL. The anthers awnlens on back 10, PemeUya. 



2. Andromeda Tribe. 



A. Anther-celbi opening through their whole 

 length, not aprx-ndage*^! ; stigma .5-Iobed, the 

 lob^ffi adnate to a Murrounding ring or cup 11. Epigsea. 



3. Erica Tribe. 



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



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



cristate or lamellate at base 23. Erica. 



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



[thalia 



4. Rhododendron Tribe. 



A. Corolla polypetalous or nearly so. 



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

 deciduous. 



c. Petals 4; stamens 8 2.'). ElUuttia. 



CC. Petals 3; stamens 6 26. Tripetaleia 



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



deciduous 27. Cladotham- 



BBB. Fls. in umbel-like racemes; petals 5; stamens {nua, 



5-10: lvs. evergreen. 

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



seeds winged 28. Ledum. 



CC. Lvs. glabrous: caps. 2-3-ceUed; seeds 



angular 29. Leiophyllum. 



AA. Corolla gamopetalous. 



B. Seeds compressed, winged: corolla slightly 

 irregular; stamens 5-10. 

 c. Starnens usually exserted; anthers open- 

 ing by a round terminal pore; corolla 



rotate, campanulate or funnelforni 30. Rfiododen- 



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



oblique pore ; corolla urceolate : lvs. 



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: 



lvs. oblong-elliptic, cihate 33. Rhodo- 



DDD. The corolla urceolate or campanulate; [thamnus. 



fls. terminal, .solitary or in umbels: 



lvs. heath-like 34. PhyUodoce. 



CC. Stamens o or 8. 



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

 broadly funnelforni: lvs, elliptic, op- 

 posite, smooth 35. Loiseleuria. 



DD. Fls. 4-merous; lvs. alternate. 



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



loose racemes; lvs. heath-like. .... .36. Bryanthua. 



EE. Corolla campanulate-urceolate with 

 short 4-toothed limb; fls. in loose 

 racemes: lvs. tomentose below 37. Z)a6(Ecia. 



The genus Pentapterygium is included in the work. 



112. EPACRIDACE^. 



Style inserted in the intruded vertex of the ovary; 

 stamens epipetalous; anthers 1-celled; corolla- 

 lobes quincunciately imbricate; bracts numer- 

 ous, passing into Hepals Epacrit. 



The recent genus Hupicola is also mentioned in the work. 



