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Flora of Australia Online

*Roldana petasitis (Sims) H.Rob. & Brettell, Phytologia 27: 423 (1977); so called from a similarity in the leaves to those of species in the genus Petasites. .

Cineraria petasitis Sims, Bot. Mag. 37: t. 1536 (1813); Senecio petasitis (Sims) DC., Prodr. 6: 431 (1838). T: cultivated, not designated.

Illustrations: T.H.Everett, New York Bot. Gard. Ill. Encycl. Hort. 9: 3126 (1982); A.B.Graf, Exotica 12th edn, 1: 812 (1985), as Senecio petasitis ; G.J.Harden in G.J.Harden, Fl. New South Wales 3: 299 (1992).

Bushy shrub to 3 m tall, pilose throughout. Leaves with petiole 7–14 cm long; lamina almost circular in outline, 6–14 cm long, 7–15 cm broad, ±cordate to truncate at base, with 9–11 shallow, somewhat triangular lobes and small, hard denticulations, palmately veined, scattered strigulose above, pale crisped-pubescent below. Capitula cylindrical, in large, compound, cymose panicles, with reduced, sessile leaf-like bracts; involucral bracts 8, narrowly lanceolate, 8–10 mm long, shortly pubescent. Outer florets 5 or 6, ligulate, 6–8 mm long, yellow; disc florets c. 15, 7–8 mm long, narrowly funnel-shaped in upper half. Cypselas narrowly cylindrical, 3–4 mm long, striate, with a narrow apical rim, glabrous; pappus hairs 6–7 mm long. 

Lord Howe Is. A naturalised garden escape, native to Central America (Mexico to Nicaragua) and widely cultivated in warm temperate and subtropical gardens, but not usually escaping. 

L.H.Is.: alongside lane at ‘Ocean View’, NE of the jetty, R.O.Belcher 2673 (EMC); Anderson Rd, J.Pickard in A.N.Rodd 1402 (NSW); SE side of Mt Lidgbird, A.C.Beauglehole 5666 (CANB, MEL).

 

Data derived from Flora of Australia Volume 49 (1994), a product of ABRS, ©Commonwealth of Australia