Erysimum inconspicuum
 
Small-Flowered Prairie Rocket

Short Stamen

Oro Lake Regional Park
24-June-2011

The flower has two short stamens and four long stamens.  Each short stamen is subtended by an annular or semicircular gland.  Each pair of long stamens is also subtended by a gland.  Note the sepals have been removed for the purpose of this photo.

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Inconspicuum: Answers to key questions in Budd's Flora and Flora of Alberta leading to this species. 
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plants NOT alpine

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pubescence mostly or entirely of 2-branched hairs; NOT [pubescence mostly or entirely of trifid or stellate hairs]

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flowers smaller; NOT [flowers large, 2-4 cm across]

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petals shorter than 10 mm; NOT [petals longer than 10 mm] (BF)

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petals 6-12 mm long; NOT [petals 3-5 mm long], NOT [petals 15-25 mm long] (FOA)

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flowers yellow; NOT [flowers pink-purple or purple]

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style 1.0-1.5 mm long; NOT [style generally more than 1.5 mm long]

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stalks of seedpods not one-quarter as long as pods; NOT [stalks of seedpods almost half as long as pods]

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siliques 2-10 cm long; NOT [siliques 13 cm long]

 

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Erysimum: Answers to key questions in Budd's Flora and Flora of Alberta leading to this genus. 
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plants of lowland areas; NOT [plants mostly of alpine areas]

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plants 2-10 dm tall; NOT [plants generally less than 2 dm tall]

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stem leaves entire to dentate, not lobed; NOT [stem leaves deeply lobed, lyrate to tripinnate] (BF)

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leaves more or less entire; NOT [leaves divided] (FOA)

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cauline leaves not auriculate and clasping; NOT [cauline leaves auriculate, clasping]

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pubescence consisting of hairs, attached at the middle; NOT [pubescence consisting of simple or several-forked hairs]

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petals yellow; NOT [petals white, pink-tinged, pink or purple]

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fruits NOT flattened

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pods NOT compressed at right angles to the central partition

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pods usually at least 4 times as long as wide; NOT [pods usually not more than 3 times as long as wide] (BF)

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fruit much longer than broad; NOT [fruit 2-3 times longer than broad or shorter] (FOA)

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pods scarcely beaked; NOT [pods with a long, distinct beak]

 

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

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

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

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sepals 4

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

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petals 4; NOT [petals 5]

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stamens usually 6, four long and two short; NOT [stamens 6, of equal length], NOT [stamens usually more than 10]

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ovary superior; NOT [ovary inferior]

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carpels 1 or 2; NOT [carpels 3-5]