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Symphytum
See list of 3 species in this genusReference: Gadella (1984).
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1a. Leaves decurrent as wings on the stem and branches; mericarps smooth; filaments nearly as wide as the anthers
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1b. Leaves not decurrent; mericarps tuberculate-roughened; filaments narrower than the anthers
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2a. Root thick, but neither tuberous nor constricted at intervals; corolla pink turning blue; stem usually branched, pubescent, in part, with stout, basally flattened hairs
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2b. Root tuberous, enlarged and constricted at intervals; corolla pale yellow; stem usually simple, pubescent with subterete hairs
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Each photo represents one species in this genus.