Classification
Class
Magnoliopsida Brongn.
Order
Asterales Link
Family
Compositae Giseke
Genus
Erigeron L.
 Nomenclature
Scientific Name:
Erigeron floribundus (Kunth) Sch.Bip. (1865)
Synonymy:
  • ≡ Conyza floribunda Kunth (1818)
  • = Conyza albida Spreng., Syst. Veg., ed. 16 [Sprengel] 3, 514 (1826)
  • ≡ Conyza bilbaoana J.Rémy (1849)
  • = Erigeron bilbaoanus (J.Rémy) Cabrera
 Description

Erect annual to biennial herb, up to 1.5 m tall.  Stems ridged, sparsely hispid, becoming almost glabrous below.  Cauline lvs elliptic to narrow-oblanceolate or linear, flat, apetiolate and cuneate, acute, entire, remotely serrate, or shallowly 1-pinnatifid, usually almost glabrous except for short cilia, sometimes sparsely to moderately scaberulous, 40–80–(120) × 3–10–(20) mm;  uppermost lvs smaller, often ± linear.  Infl. a long, leafy pyramidal panicle with dominant main axis.  Capitula 1.5–2.5 mm diam.; receptacle with raised flanges between pits.  Inner involucral bracts narrow-triangular, green, later tinged purple, glabrous, 3.2–4 mm long;  outer bracts glabrous or with few hairs or ciliate.  Outer florets filiform or with inconspicuous ligules < 0.5 mm long, cream, later tinged purple.  Achenes obovoid-cylindric, sparsely hairy, 1.2–1.4 mm long;  pappus hairs cream.  

[From:  Webb et al. (1988) Flora of New Zealand. Volume 4. as Conyza bilbaoana J.Rémy]

 Biostatus
Exotic
 Phenology

Flowering: Sep.–May–(Aug.)

 Bibliography
Biosecurity New Zealand 2012: Regional Pest Management Strategies Database. http://www.biosecurityperformance.maf.govt.nz/ [as Conyza albida Spreng.]
Green, P.S. 1994: Oceanic Islands, 1. Flora of Australia. Vol. 49. Australian Government Publishing Service, Canberra. ABRS/CSIRO, Canberra and Melbourne. [as Conyza albida Spreng.]
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. [as Erigeron bilbaoanus (J.Rémy) Cabrera]
Sprengel, C.P.J. 1826: Systema vegetabilium [Caroli Linnaei ... ]. Editio decima sexta. Vol. 3. Göttingen.