- Taxon
- Weed
Classification
Nomenclature
Scientific Name:
Roldana petasitis (Sims) H.Rob. & Brettell, Phytologia 27: 423 (1974)
Synonymy:
- ≡ Cineraria petasitis Sims (1813)
- ≡ Senecio petasitis (Sims) DC., Prodr. [A. P. de Candolle] 6, 431 (1838)
Description
Erect, perennial shrub, up to c. 1–(2) m tall. Stems moderately to densely clothed in short hairs, becoming less hairy, branched from base and above. Lvs moderately to densely clothed in short hairs giving a velvety texture to both surfaces, petiolate; petiole ± = lamina, not amplexicaul; lamina ± orbicular, acute to obtuse, truncate to cordate at base, minutely denticulate and shallowly lobed with 4–7, ± flat-sided lobes on each side, 10–20 cm diam.; venation palmate. Uppermost lvs becoming smaller, and sometimes apetiolate and obovate. Capitula in dense terminal panicles. Supplementary bracts 0–4, linear-lanceolate, 1.5–7 mm long. Involucral bracts 7–9, ovate- to elliptic-oblong, pubescent, 7–12 mm long. Ray florets 4–6; ligules yellow, 5–10 mm long. Disc brownish yellow. Mature achenes not seen, glabrous.
[From: Webb et al. (1985) Flora of New Zealand. Volume 4 as Senecio petasitis (Sims) DC.]
Biostatus
Exotic
Bibliography
Biosecurity New Zealand 2012: Regional Pest Management Strategies Database. http://www.biosecurityperformance.maf.govt.nz/
de Candolle, A.P. 1838 ("1837"): Prodromus Systematis Naturalis Regni Vegetabilis. Vol. 6. Treuttel et Würtz, Paris.
Howell, C. 2008: Consolidated list of environmental weeds in New Zealand. DOC Research & Development Series 292: 42.
Robinson, H.W.; Brettell, R.D. 1974: Studies in the Senecioneae (Asteraceae). V. The genera Psacaliopsis, Barkleyanthus, Telanthophora and Roldana. Phytologia 27(6): 402–439.
Thompson, I.R. 2006: A taxonomic treatment of tribe Senecioneae (Asteraceae) in Australia. Muelleria 24: 51–110.
