Leucophysalis grandiflora
 
Large White Ground-Cherry

Flowers

Hudson Bay Regional Park
13-June-2015

Note the flowers occur 2-4 at a node, not singly.

Note the key to the genera in Budd's Flora requires corolla not rotate, yet the key to the species in the same flora requires corolla rotate.  The remainder of the key answers appears below.

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Grandiflora: Answers to key questions in Budd's Flora leading to this species. 
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flowers 2-4 at a node; NOT [flowers solitary]

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corolla white; NOT [corolla white or yellowish]

 

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Leucophysalis: Answers to key questions in Budd's Flora leading to this genus. 
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plants herbaceous; NOT [plants shrubby, often spiny]

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fruit a berry, often enclosed in an inflated bladder-like calyx; NOT [fruit a capsule]

 

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Solanaceae: 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 green or with some chlorophyll; NOT [plants parasitic or saprophytic, without chlorophyll]

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plants without milky juice

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NOT [twining plants with large, funnel-form corolla]

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flowers not in heads or spikes; NOT [flowers in long or short spikes], NOT [flowers in heads or in form resembling a head]

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flowers with two floral rings

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petals wholly or partly united forming a tube or bell

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corolla regular; NOT [corolla irregular]

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stamens 4 or 5; NOT [stamens 8 or 10]

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stamens alternating with corolla lobes, or twice their number; NOT [stamens directly in front of corolla lobes]

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style terminal; NOT [style from center of lobes of ovary]

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ovary superior; NOT [ovary inferior]

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ovary 2-celled; NOT [ovary 1-celled], NOT [ovary 3-celled]

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ovary with seeds borne on axis in center of cell; NOT [ovary with seeds born on wall of cell]

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fruit a berry or a capsule; NOT [fruit with 4 nutlets]