Ulmus americana
 
American Elm

Flower Side

Regina
19-April-2005

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Americana: Answers to key questions in Flora of the Great Plains leading to this species. 
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flowers with slender pedicels; NOT [flowers nearly sessile or short pedicelled]

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flowers drooping

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samaras elliptical, ovate to oblong; NOT [samaras suborbicular to broadly elliptic]

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samaras densely ciliolate-fringed on each margin

 

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Ulmus: Answers to key questions in Budd's Flora leading to this genus. 
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leaves with a single midrib; NOT [leaves with 2 prominent veins beside the midrib]

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fruit a thin, broadly winged samara; NOT [fruit a drupe with large stone]

 

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

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plants with erect stems; NOT [plants with decumbent stems]

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plants NOT climbing

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stipules present

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leaves simple; NOT [leaves pinnately compound]

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leaves wider; NOT [leaves linear, 2.5-7 mm long]

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leaves deciduous; NOT [leaves everygreen]

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flowers appearing BEFORE leaves

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flowers NOT in catkins or aments; NOT [male flowers, at least, in catkins or aments]

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fruit WITHOUT a feathery style; NOT [fruit with a persistent feathery style]

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fruit dry when ripe; NOT [fruit fleshy when ripe]