Draba nemorosa

Yellow Whitlow-grass

Highway # 2 at Arm River
09-May-2003

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Nemorosa:  Answers to key questions in Budd's Flora and Flora of Alberta leading to this species.
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plants annual

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stems 5 to 30 cm high

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flowering stems usually with 2 or more leaves

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pedicels 1.5 - 4 times as long as the pod

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stem leaves usually 1-5

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leaves ovate to oblong, denticulate

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flowers (pale) yellow

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pods 5 - 10 mm long

 
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Draba: Answers to key questions in Budd's Flora and Flora of Alberta leading to this genus.
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petals yellow

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fruit pod-like (silique or silicle), dehiscent by 2 valves

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pods not compressed at right angles to the central partition

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pods opening lengthwise

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pod conspicuously flattened, elliptic to linear oblong, often twisted

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pods much flattened, at least twice as wide as thick

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pods not more than 3 (BF) or 4 (FOA) times as long as wide

 
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Cruciferae: Answers to key questions in Budd's Flora leading to this family.
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herbs

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plants terrestrial or semi-aquatic

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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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leaves without stipules, or having glands

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some or all leaves alternate

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calyx regular

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4 sepals

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corolla regular in shape

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4 petals

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stamens usually 6, 4 long and 2 short

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ovary superior

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1 or 2 carpels