Class
Order
Family
Genus
Classification
Nomenclature
Scientific Name:
Erigeron sumatrensis Retz. (1788)
Synonymy:
- ≡ Conyza sumatrensis (Retz.) E.Walker, J. Jap. Bot. 46: 72 (1971)
- = Conyza ambigua DC. (1815)
Description
Erect annual or biennial herb, up to 2–(2.5) m tall. Stems ridged, moderately to densely softly hairy, often becoming sparsely hairy below. Cauline lvs usually obovate to narrow-oblanceolate, rarely linear, ± flat, apetiolate and cuneate, acute, often shallowly 1-pinnatifid or remotely serrate, sometimes entire especially above, sparsely to densely scaberulous, ciliate, (20)–35–120–(250) × 4–20–(45) mm; uppermost lvs smaller, usually narrow-oblanceolate or narrow-elliptic. Infl. a leafy pyramidal panicle with dominant main axis. Capitula 1.5–2 mm diam.; receptacle usually with distinct flanges between pits, sometimes with short flanges or ± smooth. Inner involucral bracts lanceolate, green, usually hairy at least toward apex, 4–5.5–(6) mm long; outer bracts moderately to densely hairy. Outer florets filiform, cream, usually becoming reddish. Achenes obovoid, sparsely hairy, 1–1.2–(1.4) mm long; pappus hairs fawn or dirty white.
[From: Webb et al. (1985) Flora of New Zealand. Volume 4 as Conyza albida Spreng.]
Biostatus
Exotic
Bibliography
Green, P.S. 1994: Oceanic Islands, 1. Flora of Australia. Vol. 49. Australian Government Publishing Service, Canberra. ABRS/CSIRO, Canberra and Melbourne. [as Conyza sumatrensis (Retz.) E.Walker]
Nesom, G.L. 2008: Classification of subtribe Conyzinae (Asteraceae: Astereae). Lundellia 11: 8–38.
Nesom, G.L. 2018: Erigeron floribundus and E. sumatrensis (Asteraceae) in the USA and Mexico. Phytoneuron 2018-27: 1–19.
Shi Zhu; Chen Yilin; Chen Yousheng; Lin Yourun; Liu Shangwu; Ge Xuejun; Gao Tiangang; Zhu Shixin; Liu Ying; Yang Qiner; Humphries, C.J.; von Raab-Straube, E.; Gilbert, M.G.; Nordenstam, B.; Kilian, N.; Brouillet, L.; Illarionova, I.D.; Hind, D.J.N.; Jeffrey, C.; Bayer, R.J.; Kirschner, J.; Greuter, W.; Anderberg, A.A.; Semple, J.C.; Štěpánek, J.; Freire, S.E.; Martins, L.; Koyama, H.; Kawahara, T.; Vincent, L.; Sukhorukov, A.P.; Mavrodiev, E.V.; Gottschlich, G. 2011: Asteraceae. Wu, C.Y.; Raven, P.H.; Hong, D.Y. (ed.) Flora of China. Vol. 20-21. Science Press, Beijing, and Missouri Botanical Garden Press, St. Louis.
Walker, E.H. 1971: Journal of Japanese Botany 46: 72.
Wu, C.Y.; Raven, P.H.; Hong, D.Y. 2011: Flora of China (Asteraceae). Wu, C.Y.; Raven, P.H.; Hong, D.Y. (ed.) Flora of China. Vol. 20-21. Science Press, Beijing, and Missouri Botanical Garden Press, St. Louis. [as Conyza ambigua DC.]
