Passiflora clypeophylla Mast. ex J. D. Smith

Climbing vine, minutely antrorsely appressed-puberulent throughout with unicellular, curved trichomes, 0.03–0.10 mm long, 0.03 mm wide. Flowering stems 2.1–3.4 mm in diameter, subterete. Stipules (3.3-)5.9–6.4 mm long, 0.8–1.3 mm wide, narrowly ovate-triangular, acute; petioles 3.3–3.8 cm long, with 2, opposite to subopposite, sessile, discoid nectaries with flat rims, 1.3–1.7 mm wide (on the widest axis), 0.5–0.6 mm high, borne on the proximal half of the petiole (0.37–0.47 of the distance from the base toward the apex of the petiole). Laminas 6.0–8.7 cm long, 6.7–10.8 cm wide, somewhat coriaceous, distinctly peltate (the distance from leaf base to point of petiole insertion 10.4–14.4 mm), subrotund, obscurely 3-lobed 0.02–0.07 the distance from the leaf outline to the leaf base, lateral lobes 4.0–6.2 cm long, ca. 3.0–5.6 cm wide, somewhat elliptic, obtuse to emarginate, central lobe somewhat elliptic, obtuse to emarginate, central vein 4.6–7.3 cm long (measured from point of petiole insertion to the leaf apex), angle between the lateral lobes 110–125°, ratio of lateral lobe to central vein length 0.76–0.87, margins entire, hyaline, primary veins 3, diverging and branching above base, laminar nectaries present, 2, submarginal, associated with the minor veins of the abaxial surface, 0.8–0.9 mm in diameter, circular to widely elliptic, sessile; tendril 0.5–0.9 mm wide, present at flowering node. Flowers borne in leaf axils. Pedicels 16.9–17.3 mm long, 0.6 mm wide, 2 per node; bract(s) absent; spur(s) absent. Flowers 25.0–26.3 mm in diameter with stipe 9.4–14.3 mm long, 0.5–0.8 mm wide; hypanthium 5.8 mm in diameter; sepals 9.6–10.3 mm long, 4.3–5.0 mm wide, ovate-triangular, acute, greenish yellow; coronal filaments in 2 series, the outer 28, 4.7–5.5 mm long, 0.4–0.6 mm wide, linear, spreading, purplish to reddish with greenish yellow or yellow tips when dried, ratio of outer coronal row to sepal length 0.46–0.58, the inner 31, 2.3–2.5 mm long, 0.3 mm wide, linear, capitate, erect, purplish to reddish when dried, ratio of inner coronal row to outer coronal row length 0.42–0.51; operculum 1.6 mm long, plicate, purplish to reddish with greenish yellow tip when dried, the margin with narrow minutely fimbrillate teeth; nectary 0.3 mm high, 1.2 mm wide; limen recurved, 0.3 mm high, 0.2 mm wide, purplish to reddish at base lightening toward tip when dried, limen floor 2.7 mm in diameter, purplish to reddish when dried; androgynophore 3.8 mm long, 0.9 mm wide, purplish to reddish on proximal half and greenish yellow on distal half when dried; free portions of the staminal filaments 3.4–3.8 mm long, 0.5–0.6 mm wide, linear, greenish yellow when dried; anthers 1.7–2.0 mm long, 0.9–1.3 mm wide; styles 3.8–4.3 mm long including stigmas, 0.4–0.5 mm wide, greenish yellow when dried; stigmas 1.1–1.3 mm in diameter; ovary 1.8 mm long, 1.5 mm wide, globose, greenish yellow when dried. Fruit unknown.

Endemic to Guatemala in the department of Alta Verapaz at ca. 762 m altitude. Based upon locality information included on the herbarium specimen and information gathered by J. M. MacDougal (pers. comm.) on a recent trip to the type locality, Passiflora clypeophylla is (or was) likely found on slopes of premontane tropical moist forest.