1	"Petioles and lamina glabrous (or with scattered minute hairs <0.1 mm long)"	2
1	"Petioles or lamina with hairs >0.2 mm long, visible with naked eye or hand lens"	8
2	"Stipules foliaceous, 6-15 mm wide"	3
2	"Stipules deltate to linear, 1-2 mm wide"	4
3	"Leaves digitate with 5-7 lobes; flowers 7-10 cm diameter"	"Passiflora caerulea"
3	"Leaves trilobed; flowers 4-5.5 cm diameter"	"Passiflora subpeltata"
4	"Leaves simple and entire, without lobes or marginal teeth"	5
4	"Leaves 3-lobed, the lobes sometimes toothed"	7
5	"Stipules 6-9 mm long; petiolar nectaries raised, positioned close to lamina; flowers solitary"	"Passiflora laurifolia"
5	"Stipules 1-3 mm long; petiolar nectaries absent or flush with surface, positioned near base of petiole or about halfway along; inflorescence of 2-8 flowers"	6
6	"Laminar nectaries scattered on lower surface; primary axis of inflorescence terminating in a flower"	"Passiflora aurantioides"
6	"Laminar nectaries at base of lamina, close to midrib; primary axis of inflorescence terminating in a tendril"	"Passiflora kuranda"
7	"Lamina margins toothed; flowers white"	"Passiflora edulis"
7	"Lamina margins smooth; flowers yellow to dark pink"	"Passiflora aurantia var. aurantia"
8	"Petiolar nectaries absent"	9
8	"Petiolar nectaries 2, readily seen"	11
9	"Leaves 2-lobed (central lobe virtually obsolete); hypanthium cylindrical; fruits ribbed"	"Passiflora sanguinolenta"
9	"Leaves 3-lobed; hypanthium saucer-shaped; fruits not ribbed"	10
10	"Stipules divided into linear segments, and bearing glandular hairs; lamina and petioles with glandular hairs; flowers white"	"Passiflora foetida"
10	"Stipules undivided; lamina and petioles lacking glandular hairs; flowers pink to red"	"Passiflora aurantia var. pubescens"
11	"Petiolar nectaries at very base of petiole; flowers bright red"	"Passiflora coccinea"
11	"Petiolar nectaries on upper part of petiole or around halfway; flowers white, greenish-white or pink"	12
12	"Stipules foliaceous, 5-16 mm wide; leaf lobes acutely toothed"	"Passiflora morifolia"
12	"Stipules 0.5-1 mm wide, inconspicuous; leaves/leaf lobes not toothed"	13
13	"Whole of lamina with moderately dense hairs; petiolar nectaries 1.0-1.4 mm diameter; petals present; old stems not corky"	"Passiflora herbertiana"
13	"Lamina glabrous or with hairs only on margins or along veins; petiolar nectaries 0.3-1.0 mm diameter; petals absent; old stems corky"	14
14	"Petiolar nectaries borne on distal end of petiole (70-95% of the distance from the base toward the apex), 0.3-0.6 mm diameter; laminar nectaries always absent; some leaves entire or with lateral lobes < 10 mm long, lobes often unequal"	"Passiflora pallida"
14	"Petiolar nectaries borne about halfway along petiole (40-60% of the distance from the base toward the apex), 0.6-1.0 mm diameter; 1-4 laminar nectaries present on the underside of at least some leaves; all leaves 3-lobed, lobes equal and > 10 mm long"	"Passiflora suberosa subsp. litoralis"