Classification
 Nomenclature
Scientific Name:
Erigeron karvinskianus DC. (1836) – as Karvinskianum
Synonymy:
  • = Erigeron mucronatus DC. (1836) – as mucronatum
Vernacular Name(s):
Mexican daisy
 Description

Procumbent to ascending perennial herb. Stems ridged, sparsely hairy, becoming glabrous, much-branched, rooting, 15–70 cm long. Lvs mostly or all cauline at flowering; lower cauline lvs ovate-elliptic to elliptic or obovate-elliptic, apetiolate and cuneate, cuspidate, often 3-lobed with central lobe largest, sometimes with lateral lobes reduced to teeth at c. 1/2 length of lf, sometimes entire, usually sparsely hairy, sometimes moderately hairy or almost glabrous, often ciliate, (10)–15–40–(60) × (2)–5–15–(25) mm; uppermost lvs smaller, narrow-elliptic, not lobed. Capitula c. 15–25 mm diam., solitary or few in corymbs. Involucral bracts lanceolate, glabrous or sparsely hairy, 2.5–4 mm long. Ligules linear, usually white flushed with purplish pink, sometimes white, pink, or purple, 5–8 mm long. Disc yellow or brownish yellow. Achenes sparsely hairy, 1–1.4 mm long; pappus of 1 row of long hairs, sometimes with shorter hairs intermixed.

[From: Webb et al. (1988) Flora of New Zealand. Volume 4.]

 Biostatus
Exotic
 Phenology

Flowering: Sep.–May.

 Bibliography
Biosecurity New Zealand 2012: Regional Pest Management Strategies Database. http://www.biosecurityperformance.maf.govt.nz/
Biosecurity New Zealand 4 Aug 2011: Unwanted Organisms Register. http://www.biosecurity.govt.nz/pests/registers/uor
Biosecurity New Zealand 2008: National Plant Pest Accord. MAF Biosecurity New Zealand, Wellington.
Howell, C. 2008: Consolidated list of environmental weeds in New Zealand. DOC Research & Development Series 292: 42.
Ministry for Primary Industries 23 Feb 2017: Unwanted Organisms Register. Version 02.01.02. https://www1.maf.govt.nz/uor