Vaccinium myrtilloides
 
Blueberry

Flower Bottom

Fir River Shelter on Fir River Road, West of Hudson Bay
12-June-2015

Budd's Flora places genus Vaccinium in family Vacciniaceae Flora of Alberta follows more modern treatments and places Vaccinium in a more broadly circumscribed Ericaceae.  In addition, Budd's Flora names the species angustifolium instead of myrtilloides.  Therefore the notes below reflect a combination of the two different schemes.

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Myrtilloides: Answers to key questions in Budd's Flora and Flora of Alberta leading to this species. 
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plants mostly erect; NOT [plants mat-forming, with creeping or trailing branches]

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leaves thin; NOT [leaves thick, coriaceous, revolute, shining above]

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leaves very hairy, especially beneath; NOT [leaves glabrous or sparsely hairy]

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leaves deciduous; NOT [leaves evergreen]

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flowers in dense terminal racemes; NOT [flowers axillary, solitary or a few together]

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corolla urn-shaped or globose; NOT [corolla open cup-shaped, 4-lobed, rose-pink]

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fruit blue, black or red; NOT [fruit red]

 

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Vaccinium: Answers to key questions in Budd's Flora and Flora of Alberta leading to this genus. 
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stems erect, or if creeping not filiform; NOT [stems filiform and creeping], NOT [dwarf plants with very slender creeping stems]

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petals united into an urn-shaped or campanulate tube; NOT [petals appearing separate, turned backward]

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corolla cup-shaped or urn-shaped; NOT [corolla divided nearly to the base, lobes reflexed]

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ovary inferior; NOT [ovary superior]

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fruit fleshy; NOT [fruit fleshy or dry]

 

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Vacciniaceae: Answers to key questions in Budd's Flora  leading to this family. 
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shrubs or trees; NOT [herbs]

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leaves alternate; NOT [leaves opposite or whorled]

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flowers not in heads

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flowers with two floral rings

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petals wholly or partly united forming a tube or bell

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ovary inferior; NOT [ovary superior]

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fruit fleshy; NOT [fruit usually a capsule, sometimes a mealy-fleshy drupe]

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fruit many-seeded; NOT [fruit 1-seeded]