Potentilla arguta
 
White Cinquefoil

Flower in Ground

30-June-07
Duck Mountain Provincial Park

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Arguta: Answers to key questions in Budd's Flora and Flora of Alberta leading to this species. 
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plants of drier habitats; NOT [plants of aquatic and marshy habitats]

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plants herb-like, not woody based; NOT [plants shrubby or with woody bases]

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perennial plant with stout rootstocks, often showing old bases of leaves; NOT [annual or biennial plant without perennial rootstocks]

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plants WITHOUT runners; NOT [low, creeping plant with runners]

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plants robust; NOT [plants slender]

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plants glandular-hairy; NOT [plants rarely glandular-hairy]

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basal leaves pinnate; NOT [basal leaves trifoliolate or 5-9 digitate]

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flowers few-many, in cymes; NOT [flowers solitary on naked peduncles, mostly from the nodes of stolons]

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cymes short, crowded; NOT [cymes open]

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petals little longer than sepals; NOT [petals longer than sepals] (Flora of Alberta)

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petals slightly longer than the sepals; NOT [petals as long as the sepals] (Buddís Flora)

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flowers white; NOT [flowers yellowish white, yellow, or reddish purple]

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styles nearly basal in origin; NOT [styles arising near top of ovary]

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styles slender-fusiform; NOT [styles tapered from base]

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stamens 25-30; NOT [stamens 5-20]

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achenes generally smooth; NOT [achenes hairy]

 

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Potentilla: Answers to key questions in Budd's Flora  and Flora of Alberta leading to this genus. 
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herbs, or with a woody base and otherwise herbaceous; NOT [shrubs or trees]

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leaves compound; NOT [leaves simple, usually toothed]

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 leaves NOT much dissected into linear lobes

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basal leaves with MORE than 3 leaflets

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calyx bractlets present (appearing like 10 sepals); NOT [calyx bractlets lacking]

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hypanthium LACKING hooked prickles

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petals usually longer than the sepals; NOT [petals small, little if any longer than the sepals]

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stamens 10-many; NOT [stamens 5]

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carpels 10-many; NOT [carpels 5-20], NOT [carpels 2] 

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styles articulated at base and not jointed near the middle; NOT [styles not articulated at base but often with an abrupt bend or joint near the middle]

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style much shorter than the achene; NOT [style much longer than the achene]

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NOT [style hooked or plumose in fruit]

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style deciduous from the achene, not persisting in the fruit

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carpels becoming achenes NOT [carpels becoming drupelets (raspberry-like)]

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fruit NOT fleshy

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

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

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flowers regular in shape

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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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stamens usually numerous; NOT [stamens 5 or 10]

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ovary of one or more carpels, either separate or enclosed by a fleshy receptacle; NOT [ovary of 5 united carpels]