Classification
 Nomenclature
Scientific Name:
Pilosella officinarum Vaill., 5: 703 (1754)
Synonymy:
  • = Hieracium pilosella subsp. micradenium Naeg. & Peter
  • = Hieracium pilosella L.
  • = Hieracium pilosella subsp. trichosoma Peter
 Description

Stolons slender, with numerous long simple eglandular hairs and dense stellate hairs. Rosette lvs dull glaucescent green above, white-hairy beneath, oblanceolate, sessile or shortly petiolate, entire or very obscurely dentate, (1.5)–2.5–5–(7) × 0.6–1.5–(1.8) cm, subacute and often apiculate, cuneate at base; upper surface with scattered coarse simple hairs 4–6 mm long; lower surface with fine eglandular hairs 1–2 mm long and very dense stellate hairs. Stem lf 0–(1), scale-like. Flowering stems erect, (2)–5–10–(15) cm tall, with 0-few simple eglandular hairs, numerous short glandular hairs and dense stellate hairs. Capitula solitary; involucre 8–13 mm long; bracts with dense stellate hairs and varying proportions of simple eglandular and glandular hairs. Florets yellow, often with red stripe on outer face, c. 2× length of involucre. Achenes dark, c. 2 × 0.5 mm. Pappus 5–6 mm long.

[From: Webb et al. (1985) Flora of New Zealand. Volume 4 as Hieracium pilosella L.]

 Biostatus
Exotic
 Bibliography
Biosecurity New Zealand 2012: Regional Pest Management Strategies Database. http://www.biosecurityperformance.maf.govt.nz/ [as Hieracium pilosella L.]
Braeutigam, S.; Greuter, W. 2007: A new treatment of Pilosella for the Euro-Mediterranean flora. Willdenowia 37: 123–137.
Howell, C. 2008: Consolidated list of environmental weeds in New Zealand. DOC Research & Development Series 292: 42. [as Hieracium pilosella L.]
Vaillant, S. 1754: Neue Kennzeichen dreyer Classen von Pflanzen mit zusammengesetzeten Blumen, nämlich: der Cynarocephalarum, derer mit Artischockenhäuptern. Corymbiferarum, die zusammengesetzte, scheibenförmige Blumen tragen. Cichoracearum, weg-wartartiger. Der Königl. Akademie der Wissenschaften in Paris Physische Abhandlungen, Erster bis Fünfter, Zwölfter, Dreyzehnter Theil, welcher die Jahre [...] in sich hält. Aus dem Französischen übersetzet (Breslau 1748-1759), 5: 143-194, 333-377.