Calycobolus nutans (Moc. & Sessé ex Choisy) D.F. Austin [ Convolvulus nutans Sessé & Moc.]
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Calycobolus nutans (Moc. & Sessé ex Choisy) D.F. Austin [ Ipomoea nutans Moc. & Sessé ex Choisy] [Convolvulaceae]
M. Sessé, M. Mociño, Draw. Roy. Exped. New Spain: [Hunt instutute, Turner collection no. 0233] (1787-1803)