Viola nephrophylla
 
Northern Bog Violet

Flower in Ground

Airport Road at Hudson Bay
02-June-2017

A key to violets originally written by Vern Harmes and subsequently expanded by Glen Lee to include most of the violets found in Saskatchewan can be found here

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Nephrophylla: Answers to questions in Lee/Harmes key leading to this species. 
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rootstalk thick; NOT [rootstalk slender]

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runners absent; NOT [runners present]

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plant without leafy flowering stems, the leaf and flower stems all arise directly from a central rootstalk; NOT [plant with leafy flowering stems]

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plants glabrous; NOT [some leaf stems with hairy petioles]

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leaves not deeply divided or lobed, merely shallowly toothed; NOT [leaves cleft almost to their bases]

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flowers blue-purple; NOT [flowers pale mauve], NOT [flowers yellow], NOT [flowers white]

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NOT [flowers spur is long, about 2/3 the length of the petal blade]

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side petals or all petals bearded; NOT [petals beardless]

 

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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

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

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corolla with each petal distinct from the others

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

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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]