Sigesbeckia jorullensis

Tutin, T. G., Heywood, V. H., Burges, N. A., Moore, D. M., Valentine, D. H., Walters, S. M. & Webb, D. A., 1976, Flora Europaea. Volume 4. Plantaginaceae to Compositae (and Rubiaceae), Cambridge University Press : 141

2. S. jorullensis Kunth in Humb., Bonpl. & Kunth, Nov. Gen. Sp. 4: 284 (1820)

( S. cordifolia Kunth ).

Up to 120 cm, pubescent. Leaves broadly ovate to cordate, acute to subobtuse at apex, cuneate at base, shallowly and regularly crenate or serrate, the petiole broadly winged to the base and more or less amplexicaul. Capitula 5-8 mm across (excluding outer involucral bracts); outer involucral bracts (6-) 10-20 mm, linear-spathulate; stalked glands present on inner and outer involucral bracts and often on upper part of stem. Naturalized in Britain and Germany', casual elsewhere. [Br Ge.] (Tropical America.)

S. microcephala DC. , Prodr. 5: 496 (1836), native of Australia, with narrowly elliptical to lanceolate, sessile leaves and outer involucral bracts not exceeding the inner, also occurs as a casual.