Ulmus pumila
 
Siberian Elm

Flower Cluster Bottom

Regina
06-May-2011

bullet

Pumila: Answers to key questions in Flora of the Great Plains leading to this species. 
bullet

flowers nearly sessile or short pedicelled; NOT [flowers with slender pedicels]

bullet

flowers NOT drooping

bullet

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

bullet

samaras NOT densely ciliolate-fringed on each margin

 

bullet

Ulmus: Answers to key questions in Budd's Flora leading to this genus. 
bullet

leaves with a single midrib; NOT [leaves with 2 prominent veins beside the midrib]

bullet

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

 

bullet

Ulmaceae: Answers to key questions in Budd's Flora  leading to this family. 
bullet

trees; NOT [shrubs], NOT [herbs]

bullet

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

bullet

plants NOT climbing

bullet

stipules present

bullet

leaves simple; NOT [leaves pinnately compound]

bullet

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

bullet

leaves deciduous; NOT [leaves everygreen]

bullet

flowers appearing BEFORE leaves

bullet

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

bullet

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

bullet

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