Passiflora juliana J. M. Mac Dougal

Slender, climbing, perennial vine 3 m long or more, minutely antrorsely appressed-puberulent throughout with unicellular, curved trichomes, 0.03–0.13 mm long, 0.02–0.03 mm wide. Flowering stems 1.0–2.7 mm in diameter, terete to somewhat compressed with rounded edges, greenish yellow or reddish purple (5RP 5/6), with the base somewhat woody and cork-covered. Stipules (6.0)8.3–18.9(-23.0) mm long, 2.8–11.3(-15.0) mm wide, asymmetrically ovate to obovate, acute, 5–10 veins departing from the base; petioles 1.1–4.3 cm long, inserted 2.3–15.8 mm from the basal margins of the peltate blades, commonly bearing on the proximal half (0.21–0.52 of the distance from the base toward the apex of the petiole), 2, round or elliptic, opposite to subopposite, sessile or shortly stipitate, saucer-shaped nectaries with flat rims, 0.9–2.7 mm wide, 0.3–2.1 mm high. Laminas 3.4–14.0 cm long, 6.0–20.0 cm wide, coriaceous, occasionally variegated as juveniles, conspicuously peltate, deeply 3-lobed (0.42-)0.50–0.86 the distance from the leaf outline to the leaf base, lateral lobes 2.9–11.1 cm long, 1.2–4.5 cm wide, elliptic to obovate, acute to obtuse, central lobes 3.1–13.2 cm long, 1.3–5.0 cm wide, obovate, acute to obtuse, narrowed at base, angle between the lateral lobes 95–160°, ratio of lateral to central lobe length 0.75–0.99, margins entire, thickened, sometimes purplish red, primary veins 3, diverging and branching above base, 4–11 laminar nectaries present, submarginal, associated with the minor veins of the abaxial surface, 0.3–1.0 mm in diameter, circular to widely elliptic, sessile; tendril 0.4–1.1 mm wide, present at flowering node, absent in inflorescence. Flowers paired in leaf axils or in terminal inflorescences; inflorescences 4.7–9.8 cm long, associated reduced laminas 7.0–14.4 mm long, 0.5–1.3 mm wide. Pedicels 2.9–19.0(-27.0) mm long, 0.5–1.1 mm wide; bract(s) absent; spur(s) absent. Flowers 24.5–31.3 mm in diameter with stipe 0.9–2.0 mm long, 0.6–1.3 mm wide; hypanthium 6.0–8.3 mm in diameter; sepals 9.3–11.5 mm long, 2.6–4.9 mm wide, ovate-triangular, acute to rounded, abaxially and adaxially greenish yellow; coronal filaments in 2 series, the outer 38–46, 4.9–7.2 mm long, 0.3–0.7 mm wide, linear, tapering to a point, spreading flat, greenish yellow becoming gradually lighter in color apically, unmarked or with purple (5P 3/6) spots and streaks near base, ratio of outer coronal row to sepal length 0.47–0.74, the inner 40–47, 3.0–3.8 mm long, 0.2–0.4 mm wide, linear, capitellate, erect to slightly spreading, greenish yellow, unmarked or with a flush of purple at very base, ratio of inner coronal row to outer coronal row length 0.43–0.73; operculum 2.0–2.5 mm long, plicate, greenish yellow, the margin with narrow minutely fimbrillate teeth; nectary 1.3–1.9 mm high, 0.7–1.3 mm wide; limen recurved, 0.8–1.1 mm high, 0.2–1.0 mm wide, greenish yellow, unmarked or with a violet to dark purple tip, limen floor 2.6–3.3 mm in diameter, dark purple (5P 2.5/6); androgynophore 3.9–5.5 mm long, 1.0–1.4 mm wide, whitish with a flush of purple at the base or with the purple coloration nearly reaching the apices of the staminal filaments; free portions of the staminal filaments 2.9–4.0 mm long, 0.5–0.7 mm wide, linear, commonly greenish yellow except as noted above; anthers 3.2–4.8 mm long, 1.0–2.2 mm wide; styles 4.0–6.5 mm long including stigmas, 0.2–0.5 mm wide, greenish yellow; stigmas 1.1–1.7 mm in diameter; ovary 2.6–3.1 mm long, 2.0–2.4 mm wide, globose to ovoid, greenish yellow. Berry (13.0-)17.3–18.1(-25.0) mm long, (13.0-)14.3–14.4(-20.0) mm in diameter, globose, very dark purple with glaucous bloom. Seeds 45–55, 3.7–4.1 mm long, 2.3–2.6 mm wide, 1.5–1.9 mm thick, obovate in outline, acute at both ends, reticulate-foveate with each side marked with ca. 11–18 foveae. Germination epigeal.

Mexico, in the Pacific lowlands and foothills of Jalisco, Colima, and northern Michoacán. Disturbed tropical deciduous or semideciduous low and medium forests (selva baja caducifolia and selva mediana subcaducifolia); growing on shrubs, trees, boulders, and rocks (sometimes limestone); sea-level to ca. 610 m.

Passiflora juliana J.M. MacDougal – gatunek rośliny z rodziny męczennicowatych (Passifloraceae Juss. ex Kunth in Humb.). Występuje endemicznie w Meksyku.

Passiflora juliana là một loài thực vật có hoa trong họ Lạc tiên. Loài này được J.M. MacDougal mô tả khoa học đầu tiên năm 1992.