Classification
 Nomenclature
Scientific Name:
Cirsium Mill., Gard. Dict. Abr. (ed. 4) 334 (1754)
 Description
Biennial or perennial herbs, rarely annual. Stems winged or not. Hairs bristly, or soft and multicellular, or cobwebby. Lvs alternate, sessile, entire or pinnatifid or pinnatisect, dentate; lobes and teeth spine-tipped. Capitula homogamous, cylindric, ovoid or globose, solitary or in corymbs or clusters. Involucral bracts in several series, deltoid, lanceolate or linear; hairs cobwebby or 0; outer bracts usually spine-tipped, often spreading. Receptacle flat; scales numerous, setaceous. Florets ☿ or unisexual, all tubular. Corolla glabrous, 5-lobed, usually purple, sometimes white or yellow. Anthers acute at apex, with basal appendages 0.5–1.5 mm long; filaments ciliate. Style branches linear, erect, appressed. Achenes obovoid, weakly flattened, glabrous, smooth; achene insertion basal; pappus hairs in several rows, soft, silvery, plumose, united at base into a ring.
[From: Webb et al. (1988) Flora of New Zealand. Volume 4.]
 Biostatus
Exotic
Number of species in New Zealand within Cirsium Mill.
CategoryNumber
Exotic: Fully Naturalised4
Total4
 Bibliography
Mabberley, D.J. 2008: Mabberley's plant book, a portable dictionary of plants, their classification and uses. Edition 3. Cambridge University Press.
Miller, P.: The Gardeners Dictionary. Edition 4. London.