PLANT: Perennial tendril-climbing vines, rarely shrubs or small trees.

LEAVES: often heteroblastic, usually bearing extrafloral nectaries on the petiole and/or lamina; tendrils axillary, simple in ours.

INFLORESCENCE: with peduncles paired or solitary, arising colateral to the tendril; peduncles articulate distal to the bracts; bracts in ours setaceous to foliaceous or pinnatifid.

FLOWERS: perfect (sometimes pistil-sterile); perianth sometimes connate/adnate basally into a conspicuous floral tube, floral cup, or hypanthium, but this only flattish to campanulate in AZ plants; sepals 5; petals 5 in ours; corona 1-many series of often showy filaments, the innermost series usually connate and membranous, shielding the nectar chamber, and called the operculum; extrastaminal nectariferous disk (limen) present as ring or cup around base of androgynophore; stamens 5 in ours, borne on an elongate androgynophore; carpels 3 in ours, the stigmas 3, the ovary borne on androgynophore.

FRUITS: mostly berries.

SEEDS: arillate, dark, compressed, punctate-reticulate or transversely grooved.

SEEDS: arillate, dark, compressed, punctate-reticulate or transversely grooved.

NOTES: 500 spp.; mainly neotropical regions. (for the passion, or suffering, of Christ). Killip, E. P. 1938. Publ. Field Mus. Nat. Hist., Bot. Ser. 19:1-613. MacDougal, J. M. 1994. Syst. Bot. Monogr. 41:1-146.

REFERENCES: MacDougal, John M. 2001. Passifloraceae. J. Ariz. - Nev. Acad. Sci. Volume 33(1).

Fls 5-merous, perfect; stamens 5, monadelphous around the gynophore; corona a double or triple fringe; styles 3, elongate, with capitate or clavate stigma; fr a berry; herbaceous or woody vines. 400, mostly warm reg.

Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.

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