The upper stems of Secamone alpini may form tendril-like coils, covered in minute, rusty hairs. Not having found a support to coil around yet, the stem-tip remains straight.
The leaves are opposite, the pairs spaced by long internodes. The pairs of sturdy, short leaf petioles are angled up against the stem, then bend back for the mature leaves to spread horizontally, forming a distinctive symmetrical shape.
The leaf shape varies from oblong or elliptic to ovate or obovate (the widest part being nearer the base versus nearer the tip), sometimes lance-shaped. The leaf apex tapers, often attenuating in an elongated drip tip, the base tapering. Leaf margins are entire, rolled under.
The leaves are glossy dark green on top, the pale, greenish cream midribs conspicuous (The Tree Society of Southern Africa, 1974; Pooley, 1998; Gledhill, 1981).