Passiflora macfadyenii

Description. Slender, climbing, perennial vine 3 m long or more, densely pubescent with unicellular curved trichomes throughout, 0.2 - 0.7 mm long, 0.02 - 0.03 mm wide, also minutely antrorsely appressed-puberulent throughout with unicellular, curved trichomes, 0.08 - 0.10 mm long, 0.02 mm wide. Flowering stems 0.9 - 2.1 mm in diameter, somewhat compressed, base somewhat woody and cork-covered. Stipules 2.0 - 8.0 mm long, 0.3 - 1.1 mm wide, linear-narrowly ovate, acute to attenuate, longitudinally striate-nerved; petioles 0.4 - 1.5 (- 3.7) cm long, commonly bearing in the distal half (0.54 - 0.83 of the distance from the base toward the apex of the petiole) (1 -) 2, round or elliptic, opposite to alternate, sessile (rare) or stipitate, cupulate nectaries, 0.3 - 0.6 mm wide (on the widest axis), 0.3 - 1.0 mm high. Laminas 1.4 - 9.0 cm long, 1.6 - 6.4 (- 11.9) cm wide, deeply 3 - lobed 0.21 - 0.93 of the distance to the leaf base, lateral lobes (0.8 -) 2.0 - 4.2 (- 7.3) cm long, (0.1 -) 0.6 - 1.8 (- 2.3) cm wide, oblong to obovate, acute to rounded (rarely emarginate), central lobes 1.4 - 5.2 (- 9.0) cm long, (0.2 -) 0.5 - 3.0 cm wide, elliptic to obovate, acute to rounded (rarely emarginate), often narrowed at base, angle between the lateral lobes 79 - 134 °, ratio of lateral to central lobe lengths 0.60 - 0.96, margins entire, primary veins 3, diverging and branching at base, laminar nectaries absent; tendril 0.3 - 0.7 mm wide, present at flowering node. Flowers borne in leaf axils. Pedicels 11.0 - 18.0 (- 23.0) mm long, 0.4 - 0.8 mm wide; bract (s) absent; spur (s) absent. Tubular flowers 5.5 - 8.1 mm in diameter with stipe 1.5 - 6.5 mm long, 0.4 - 0.9 mm wide; hypanthium 5.5 - 8.1 mm in diameter; sepals 19.3 - 26.1 mm long, basally connate 7.1 - 12.5 mm, 1.3 - 3.1 mm wide, linear to narrowly ovate, acute to rounded, abaxially and adaxially red (ca. 5 R 6 / 10), free portions of sepals reflexed at anthesis; coronal filaments in 1 series, adnate to the calyx tube, 25 - 30, the free portions 2.0 - 5.7 mm long, 0.1 - 0.3 mm wide, linear to narrowly ovate, erect, appearing red with yellow apices when dried, ratio of coronal (portion not adnate to sepal) to sepal (free portion) 0.25 - 0.44; rarely a trace second coronal row of filaments may be present just outside the operculum; operculum 1.4 - 2.0 mm long, plicate, appearing red when dried, the margin with narrow minutely fimbrillate teeth; nectary 0.1 - 0.5 mm high, 0.7 - 2.5 mm wide, sulcate; limen slightly recurved to erect, 0.1 - 0.7 mm high, 0.1 - 0.5 mm wide, red when dried, limen floor 2.9 - 5.0 mm in diameter, red when dried; androgynophore 17.8 - 23.5 mm long, 0.8 - 1.1 mm wide, red when dried gradually getting lighter distally or with the red coloration nearly reaching the apices of the staminal filaments; free portions of the staminal filaments 5.4 - 8.0 mm long, 0.3 - 0.6 mm wide, linear, greenish yellow or red; anthers 2.8 - 3.5 mm long, 0.7 - 2.0 mm wide; styles 4.2 - 5.5 mm long including stigmas, 0.1 - 0.3 mm wide, greenish yellow; stigmas 0.73 - 1.33 mm in diameter; ovary 3.6 - 8.0 mm long, 1.0 - 2.7 mm wide, fusiform, greenish yellow. Berry 25.0 - 26.0 mm long, 5.9 - 9.0 mm in diameter, ellipsoid and tapering at both ends (fusiform), very dark purple. Seeds ca. 20, 3.1 - 3.7 mm long, 1.6 - 1.8 mm wide, 1.2 - 1.3 mm thick, obovate in outline, acute at both ends, reticulate-foveate with each face marked with 15 - 17 foveae.