Passiflora itzensis (J. M. Mac Dougal) Porter-Utley

Slender, low-climbing or trailing, perennial vine 1–3 m or more, minutely antrorsely appressed-puberulent throughout with unicellular, curved trichomes, 0.06–0.11 mm long, 0.02 mm wide. Flowering stems 1.4–2.3 mm in diameter, terete or somewhat compressed, greenish yellow (5GY 8/4) to very dark reddish purple (5RP 2.5/2). Stipules 2.5–5.6 mm long, 0.4–0.6 mm wide, narrowly ovate, acute to slightly attenuate, longitudinally striate-nerved; petioles 0.9–1.8(-3.0) cm long, inserted 2.4–6.1(-7.0) mm from the basal margins of the peltate blades, with 2, round or elliptic, opposite, sessile, discoid nectaries with flat rims, 1.3–1.9 mm wide (on the widest axis), 0.5–0.9 mm high, borne in the distal third of the petiole (0.62–0.83 of the distance from the base toward the apex of the petiole). Laminas 2.3–4.6 cm long, 5.0–12.4(-13.1) cm wide, coriaceous, often variegated along primary veins and major secondary veins, ratio of leaf width to central vein length measured from point of petiole insertion 1.9–5.1, depressed obovate to transversely elliptic (widely divaricately bilobed), lateral lobes (3.5-)4.3–7.4 cm long, 1.7–4.1 cm wide, elliptic, acute to slightly attenuate, central lobe commonly obsolete or present as an obtuse tip, central vein 1.8–3.1(-4.1) cm long (measured from point of petiole insertion), angle between the lateral lobes (85-)103–140°, ratio of lateral lobe to central vein length 1.4–2.8, margins entire, hyaline, primary veins 3, diverging and branching above base, laminar nectaries present, 6–19, submarginal, associated with the minor veins of the abaxial surface, 0.6–1.8 mm in diameter, widely elliptic to circular, sessile; tendril 0.4–0.9 mm wide, present at flowering node, absent in inflorescence. Flowers borne in leaf axils or inflorescences; inflorescences 5.3–9.6 cm long, associated reduced laminas 1.9–2.5 mm long, 1.3–2.7 mm wide. Pedicels 1.3–3.4(-5.8) mm long, 0.6–1.1 mm wide, (1-)2 per node; bract(s) absent; spur(s) absent. Flowers 20.3–25.5 mm in diameter with stipe 9.1–14.3 mm long, 0.6–1.0 mm wide; hypanthium 4.0–6.2 mm in diameter; sepals 7.5–9.8 mm long, 2.6–4.3 mm wide, ovate-triangular, acute, abaxially and adaxially greenish yellow or sometimes greenish yellow with very dark reddish purple streaks abaxially; coronal filaments in 7 series, the outer 22–31, 6.3–8.1 mm long, 0.2–0.3 mm wide, linear, spreading flat, the tips often slightly incurved, very dark reddish purple (5RP 2.5/2–3/2) with yellow (5Y 8/4–8/6) at tips, ratio of outer coronal row to sepal length 0.67–0.97, the second 20–30, 2.5–5.0 mm long, 0.1–0.2 mm wide, linear, spreading flat, very dark reddish purple with yellow tips, ratio of second coronal row to outer coronal row length 0.33–0.64(-0.75), the third ca. 50, 0.7–2.1 mm long, 0.05–0.13 mm wide, linear, spreading flat, very dark reddish purple with yellow tips, ratio of third coronal row to second coronal row length 0.22–0.59, the fourth through seventh ca. 100 per series, 0.7–1.1 mm long, 0.05–0.11 mm wide, linear, capitate, erect, very dark reddish purple, ratio of coronal rows 4–7 to third coronal row length 0.51–0.62(-0.90); operculum 0.3–0.4 mm long, denticulate, very dark reddish purple, nectary absent; limen absent, limen floor 2.8–4.1(-5.7) mm in diameter, very dark reddish purple; androgynophore appearing absent, or 0.3–1.7 mm long, 0.9–1.8 mm wide; free portions of the staminal filaments 1.9–3.4 mm long, 0.5–0.8 mm wide, linear, very dark reddish purple; anthers 1.3–2.0 mm long, 0.7–1.4 mm wide, introrse at anthesis with their axes maintained more or less parallel to the filament, anthers dehiscing distally; styles 1.8–3.1 mm long including stigmas, 0.3–0.5 mm wide, very dark reddish purple or greenish yellow with very dark reddish purple tinge toward base; stigmas 0.9–1.4 mm in diameter; ovary 1.7–2.4 mm long, 1.2–1.3 mm wide, widely ellipsoid to globose, greenish yellow. Berry 26.0 mm long, 14.0 mm in diameter, ovoid to obovoid, greenish yellow with white spots, becoming soft at the base at maturity. Seeds 30–40, 5.0–5.5 mm long, 2.0–2.2 mm wide, 1.3–1.8 mm thick, elliptic to slightly obovate in outline, acute at both ends, reticulate-foveate with each face marked with 20–22 foveae. Germination type epigeal.

Mexico, in the states of Campeche, Quintana Roo, and Yucatán. Tropical semideciduous forests (selva mediana subcaducifolia and selva mediana subperennifolia); growing in shrubs or trailing along the ground on soil of little depth, lying directly on top of limestone; 0–23 m.