Viola adunca
 
Early Blue Violet

Stamen Adaxial Side

Good Spirit Lake Provincial Park
19-May-2012

Note the connective is extended apically into a brown, membranous appendage.

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Adunca: Answers to key questions in Budd's Flora and Flora of Alberta leading to this species. 
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plants perennial; NOT [plants annual]

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plants with well-developed leafy stems; NOT [plants lacking stems, the leaves and peduncles arising from a caudex or stolons]

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stipules bract-like, much smaller than the leaf blades; NOT [stipules leaf-like, large, about the same length as the leaf blades]

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stipules toothed; NOT [stipules entire], NOT [stipules laciniate at base]

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flowers axillary

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flowers deep violet to purple to whitish blue; NOT [flowers white to pale violet to mauve], NOT [flowers yellow]

 

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

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plants terrestrial or semiaquatic; NOT [plants aquatic, leaves submerged or floating]

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plants NOT with colored milky juice

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plants with more than one normal leaf

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some or all leaves alternate; NOT [leaves opposite, whorled or basal]

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leaves with stipules; NOT [leaves without stipules, or having glands]

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flowers with two floral rings, and with each petal distinct from the others

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flowers irregular in shape; NOT [flowers regular in shape]

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calyx regular; NOT [calyx irregular, some sepals smaller than others]

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corolla with one petal spurred or sac-like; NOT [corolla pea-like]

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stamens usually separate or partly so, not in a column; NOT [stamens numerous, united into a column]

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fruit a 3-valved capsule; NOT [fruit a legume]