Ipomoea rubrocaerulea Hook. = Ipomoea tricolor Cav.
English:
rubrocaeruleus,-a,-um;

https://archive.org/stream/mobot31753002719513#page/3297/mode/2up
homotypic synonyms:
Convolvulus rubrocaeruleus (Hook.) Dietrich; Pharbitis rubrocaeruleus (Hook.) Planchon;

protologue: Bot. Mag. 8: t. 3297 (1834)

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