Convolvulus thunbergii Roem. & Schult.

Perennial forming several prostrate annual stems from a thin woody rootstock. Stems slender or occasionally ± stout, herbaceous but firm, terete, covered with rust-brown or fawn, rarely silvery white short stiff hairs, up to ±700 mm long. Leaves oblong in outline, varying to lanceolate or ovate, cordate to hastate or truncate at base, undivided and crenate to almost pinnatilobed or usually palmately 5-lobed with middle lobe the longest and all lobes crenate to pinnatifid or even bipinnatifid or whole leaf somewhat palmately bipinnatifid, ultimate lobes sometimes very fine; blade 20-50 x 5-30 mm, apex acute or occasionally obtuse; both surfaces thinly to densely covered with the same hairs as stems, especially on nerves; petiole hairy like stems, slender, up to 10 mm, rarely 18 mm long. Peduncles 1-or 2-flowered, slender, terete, hairy like stems as are bracteoles and pedicels, 10-40 mm long; bracteoles subulate or linear-subulate, 6-9 mm long or sometimes minute; pedicels up to 15 mm long. Calyx with short, stiff hairs outside as on vegetative parts; sepals unequal; outer ones herbaceous to chartaceous, ovate, ovate-lanceolate or elliptic, acuminate, usually very acute, 8-15 mm long; inner ones less hairy, distinctly shorter, suborbicular, somewhat marcescent. Corolla white or pale pink, funnel-shaped 18-25 mm long, 20-30 mm wide; midpetaline areas greenish, usually very densely hairy towards apex outside. Capsule subglobose, apiculate, glabrous, 7-9 mm wide. Seeds black, glabrous, very minutely punctate, ±5 mm long. Flowering time September to April, mostly October and November.