Senecio scandens, Herbs, perennial, scandent, rhizomatous. Stems elongated, flexuous, 2-5 m, much branched, pubescent or glabrous, becoming woody and with pale bark when old. Leaf petiole 0.5-1(-2) cm, pubescent or subglabrous, base not auriculate or with small auricle; blade ovate-lanceolate to narrowly triangular, 2.5-12 × (1.5-)2-4.5 cm, both surfaces shortly pubescent to glabrous, pinnately veined, base broadly cuneate, truncate, hastate, or rarely cordate, margin rarely subentire, usually shallowly or deeply dentate, sometimes lobulate or pinnatifid, at least toward base, with 2-6 smaller lateral lobes, apex acute-acuminate.
A new jacaranone derivative, 2-(1,6-dihydroxy-4-oxocyclohex-2-enyl) acetic acid (1), has been isolated from the whole plants of Senecio scandens var. incisus, together with three known compounds: 2'-(p-hydroxyl-cinnamoyl)-6'-jacaranone-D-glucopyranoside (2), 2'-caffeoyl-6'-jacaranone-D-glucopyranoside (3) and kampferol-3-rhamnoside (4).