SummaryRevision of Passiflora subgenus Passiflora section Dysosmia DC. (Passifloraceae). The twenty one species and 10 varieties (31 taxa) comprising subgenus Passiflora section Dysosmia DC are described and some are illustrated with photographs and line drawings. Two species, Passiflora vesicaria L. and Passiflora ciliata (Dryand) Mast., are removed from synonymy and reinstated to species rank. Passiflora baraquiniana Lemaire is removed from synonymy and given varietal status. The species Passiflora santiagana (Killip) Borhidi is reduced in rank to varietal status. Of the 38 varieties of Passiflora foetida L. described by E. P. Killip in his 1938 monograph, 28 are reduced to synonymy, four are reassigned as varieties of other species and four remain as varieties of P. foetida. A new variety, Passiflora foetida var. ellisonii Vanderplank, is described with photographs and line drawings.