134 MAINE AGRICULTURAL EXPERIMENT STATION. I9OI. 



Euyaccinium. 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 eominonly 4-lobed ; stamens 8 T . uliginosum, 



CC. Corolla commonly o-lobed : stamens in. 

 D. Plants dwarf, a foot or less high. 



E. Branches not angled ..... . . V. coespUosum 



EE. Branches sharply angled 1. MyrtUlus 



DD. Plants taller. 1—12 feet high. 



E. Margins of leaves sharply serrulate. 



V. myrtilloides 

 EE. Margins of leaves entire (except in ovali- 

 jolivm). 

 F. Size of leaves % in. long. 



V. ovalifolium, 

 EF. Size of leaves x -i— % in. long. 



V. parviioUum, 

 T . Mortinia 



Yiiis-Idaea (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. overturn 



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 10-celled ; leaves rather firm in texture but 

 deciduous ; flowers axillary and solitary or in leafy-bracted 7 

 racemes, slender pedicelled, bractlets minute or none. 



C. Anthers included : . ..V. arboreum 



CC. Anthers exserted V. stamineum 



