Trachelospermum jasminoides is a species of flowering plant in the family Apocynaceae, native to eastern and southeastern Asia (Japan, Korea, southern China and Vietnam).
The fragrant flowers, which are borne in spring to early summer, are white, 1–2 cm (3⁄8–3⁄4 in) diameter, with a tube-like corolla opening out into five petal-like lobes.
The white, rotate actinomorphic flowers have a calyx formed by five narrow, smooth, reflexed sepals 2−5 mm, much shorter than the corolla tube.
The latter has a dilated tube in the middle, 5−10 mm long, terminating in 5 obliquely bypassed lobes, all curved, resembling a helix turning counterclockwise.
[citation needed] A valuable perfume oil is extracted from the steam distilled or tinctured flowers and used in high end perfumery.