22 



EUVACCINIUM, Gray. 



Corolla ovate to globular, more or less urceolate, 4-5 toothed, 

 rose or white; filaments glabrous; anthers 2-awned, included; 

 ovary and berry 4-5 celled with no false partitions ; leaves decid- 

 uous ; flowers drooping, solitary or 2 or 4 together, developing 

 with or soon after the leaves. 



C. Corolla commonly 4-lobed ; stamens 8 F. idiginosum 



CC. Corolla commonly 5-lobed ; stamens 10. 

 D. Plants dwarf, a foot or less high. 



E. Branches not angled V. cwspitosum 



EE. Branches sharply angled ...... V. Myrtillus 



DD. Plants taller, 1 12 feet high. 



E. Margins of leaves sharply serrulate. 



V. myrtiUoides 

 EE. Margins of leaves entire (except in ovali- 



Jottum) . 

 F. Size of leaves H in. long. 



F. ovalifolium 

 FF. Size of leaves H-% in. long. 



V. parvifolium 

 V. Mortinia 



ViTis-lDAEA (Koch.) Gray. 



Corolla cylindraceous, ovate, or globose-campanulate, more or 

 less urceolate, rose or nearly white, 4-5 lobed, stamens included, 

 filaments hairy; anthers awnless (or with short awns) ; leaves 

 coriaceous and persistent ; flowers in short racemes or clusters 

 from separate buds ; bracteate and 2-bracteolate. 



C. Ovary 5-celled ; stamens 10. 



D. Branchlets pubescent V '. ovatum 



DD. Branchlets glabrous. . V . crassifolium 



CC. Ovary 4-celled ; stamens 8. 



D. Branches short (3-4 in.) from creeping stems 



V. Vitis-Idaea 

 BATODENDRON, Gray. 



Corolla open-campanulate, 5 lobed; anthers tipped with long 

 slender tubes, and 2-awned on the back; ovary and (hardly edi- 

 ble) berry falsely lo-celled; leaves rather firm in texture but 

 deciduous ; flowers axillary and solitary or in leafy-bracted 

 racemes, slender pedicelled, bractlets minute or none. 



C. Anthers included V. arboreum 



CC. Anthers exserted. . ..V . stamineum 



