1Climbing plants with tendrils.
1'Erect shrubs or small trees. No tendrils. See Taxonomy and Key: The inclusion of Paropsia in Passifloraceae is supported by the systematic wood-anatomy according to R. B. MILLER (R. B. MILLERJ. Arn. Arb.56197595).
2Androgynophore long; flowers bisexual; styles long, stigmas ± globular, smooth; anthers versatile.
2'Androgynophore 0 or short; flowers unisexual or polygamous; styles rather short, stigmas finely lobed or divided.
3Corona 0 or consisting of fine hars; disk glands 5, Ungulate or strap-shaped; anthers narrow, erect, basifixed; flowers unisexual
3'Corona double: outer corona consisting of 2-3 rows of filaments, inner corona ('operculum') laciniate; disk 0 or as a faint annulus at bottom of hypanthium; anthers broad, deeply sagittate, versatile; flowers (functionally) polygamous