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'Parthenocissus semicordata' from the website Trees and Shrubs Online (treesandshrubsonline.
While noting them to be scarcely separable at species level (perhaps only altitudinally distinct forms), Bean distinguished Parthenocissus semicordata (smaller leaves and bristly young shoots and leaves abaxially) from Parthenocissus himalayana. POWO (9/5/2025) synonymises P. himalayana with the typical variety of P. semicordata, but other authorities – e.g. Grierson & Long in the Flora of Bhutan (1991) – refer it to var. roylei (Parker) Raizada & Saxena (glabrous stems, petioles and cymes). On the basis of the glabrous stems, Bean’s description appears to accord with var. roylei.
Synonyms
Ampelopsis himalayana Royle
Parthenocissus himalayana (Royle) Planch.
A vigorous deciduous climber, with semi-woody, glabrous young stems; the tendrils terminated by clinging disks. Leaves composed of three leaflets, each shortly stalked and borne at the end of a slender, common stalk 2 to 5 in. long. Central leaflet ovate, oval, or obovate; the side ones very obliquely ovate (two or three times as much blade on one side of the midrib as on the other), and often somewhat heart-shaped at the base on one side only. They are all abruptly tapered at the apex, toothed, dark green and glabrous above, paler, slightly glaucous beneath, with a few short hairs on the midrib only; 2 to 6 in. long, 11⁄4 to 4 in. wide. Fruits globose, 1⁄4 in. wide, in loose clusters several times forked.
Native of the Himalaya up to 11,000 ft. It is a rather tender species, and only thrives well on a wall. Its leaves change to rich red in autumn.