VACCINIUM 



Botanical Ci-assifioation. — In the following scheme 

 the species are separated on the basis of natural char- 

 acters. When two closely related forms occur over 

 wide range in latitude, however, the assigned dif- 

 ferences are liable to fail at some point. The key 

 will be found useful in determining herbarium speci- 

 mens. 



a. Ovary 4--5-loculed(rarely S-10- 

 lociiled in V. Vitis-Idma). 

 B. Stiimt'lis l„n,j-,jxerled. 

 c. Fihi, mills riiloiis 5. erythrocarpon 



CC. Fill,,,,, Ills ii„l„,;,l,»t. 



I.. ,SV,,„N ,■.)■// sirndir. 



ri-iiji,,,,/ 1. Oxycoccus 



DD. Sl'i'l,,.-, xlii„l, I-. 1,-illl ,,x- 



,-,„iln,,i i,riii,,-l,,s 'J. macrocarpon 





; ylab,- 



D. Corolla commonly 4- 



lobed: stamens 8 21. uliginosum 



DD. Corolla commonly 5- 

 lobed: stamens 10. 

 E. Plants divarf, a foot or 

 less high. 

 T. Branches not angled .to. csespitosum 

 FF. Bi-an,:li,s ahiirphi 



,ii„,l,d !i. Myrtillus 



EE. PI, nits t,ilh'i\ 1-1,' ft. 

 l,i,lh. 



F. M„,-,,l„s „f l,„r,s 



s/,„i-i,i,i .^, ,-,-„i,iii .\:,. myrtilloides 

 FF. M„i;v„.< III li „, ■,'.•, 



G. /..,„,//, „/ Ir... I- 



: I nil,, s II',. ovalHolium 



■, iii-Ji,s 4 parviJolium 



CC. FHi'lll. Ill ■ :■'■■■ ' 



1.. 7' //. ,; p,;,!,' 



22. erythrinum 



i>ii. y '. J, ...'. . . •/■. 



1,. .\i.,„ — ;./. «(•«»■,(/ ,;- 



F. Bi-imcitUts pubes- 

 cent 2.'). ovatum 



FF. Bran chiefs gla- 

 brous 20. crassifolium 



EE. Stamens S: ovary 4- 



loculed 3. Vitis-ldsea 



A. Ovary 10-locnled (sometimes 

 imperfecth/ so). 

 B. Ai,th,?rs with 2 awns on the 

 l,nck. 



c. Stamens included 24. arboreum 



CC. Stamens exserted 2."). stamineum 



BE. Anthers awnless. 



c. Foliage evergreen, coria- 



D. Calgx-t eeth roundish 



,11,, I i;,-,! ,l,nse C. nitidum 



DD. Ci,l,/.,--i,, II, II, ■,,!,• 7. Myrsinites 



CC. F„li,liir ,li,',,l„„l,s {SOI,,,'- 



l,„,,'s f„,;lil,is„ insouth- 



V. Cm-Ill III ,-,ilii,,li;iccnus. .17. virgatum 

 DD. C„,iill,i sh,,,i ,111,1 ,is,i- 

 itllij hi;,,,, I. 

 E. Briii,,l,l,'ls !,irs„li' . . .^t. hirsutum 

 EE. Brunei, l,ts ,//„/,, ,i/,,s- 



or „l„„rii„S lirri/il 



in ]-. C„i,i,,h„.<, ]. 



F. Lis. ,,l.,„,:ii,s „,i,l 



pule l,i„,,ilh. 



G. Fy„it 1,1,1,1 s. vacillans 



GO. Fr„il hl„,-l; VI. nigrum 



FF. Lrs. sli;,n,ihi p„l,rs- 



cent both sides...]'.'.. Canadense 

 FFF. Lrs. e/labrous, often 

 hiiirii on midrib 

 beneath. 



Pennsylvanicum 



H. Berry blue, 



glaucous 18. corymbosum 



HH. Berry black, 



not glaucous. 19. atrococcum 

 HoKTictJLTURAL Classification. — The following key 

 to the more commonly known species is based upon 

 horticultural or garden characters : 

 A. Species eiiltirnted chiefly for 



D. A]„.,-,if li ,,,; s .ie„ie — 1. Oxycoccna 

 DD. Ap, .,■ ,il /. '(/■' ;.■ iililiise vr 



i;ii,s, 2. macrocarpon 



CC. Siewssliiul, rth,i„,ih eieep- 

 inq: bntnehes erect, 



tufted 3. Vitis-Idaea 



CCC. Stems erect, much taller, 

 2-10 ft. 

 D. Lrs. s,i,,i1l.''_,-^ f lii.hmg. 4. parviJolium 



l,i„,i 5. erythrocarpon 



BB. Color of lr,i,l l,l„e ,,r hUiel;. 



V. Plant low, ],.,-J ft. high. 



D. Foliage evergreen. 



E. Lvs. small, K-K in. 



long 6. nitidum 



EE. Lvs. larger, ^^,-1 in.. 7. Myrsinites 

 DD. Foliar/e deeidnoiis. 



E. Surface of lrs. gla- 

 brous. 

 F. Lvs. pale beiieiith, 

 not shining above. 

 (See also No. 12. 

 acre mig-ht be 

 sought V. corym- 

 bosum. i-ar. palli- 

 dinn. No. 1.^'.) 8. vacillans 



FF. Li 



be- 



alh. 



ceptinns : No. 12 

 alivays paler be- 

 neath; No. 11 

 rarely paler be- 

 neath. ) 

 a. Fls. solitary in 

 the axils. 

 H. Branches 



sharp I, I an- 



(llrd 0. Myrtillus 



angled 10. caespitosum 



GG. F'ls. in fascicles 



orshortracemes. 



H. The lvs. not 



palerbeneath.il. Pennsylvanicum 

 HH. The lvs. paler 



beneath 12. nigrum 



EE. Surface of the lvs. 

 hairy. 

 p. Ocirif and fr. glau- 



'■',,is LI. Canadense 



FF. (),;iril ,,„,! fr. 1, i r- 



siiii 14. hirsutum 



CC. Plant l„ I l.r. .;-lJ It 

 spreading. 

 D, Fls. solitary in axils. 



E. Lvs. sharply serrate.lH. myrtilloides 

 EE. Lvs. entire or slightly 



serrulate 16. ovaliJolium 



DD. Fls. in racemes or co- 

 rymbs. 

 E. Itacemes elongated on 



naked branches 17. virgatum 



