Classification
 Subordinate Taxa
 Nomenclature
Scientific Name:
Arctium L., Sp. Pl. 816 (1753)
Type Taxon:
Vernacular Name(s):
Beggar's-buttons; Burdock; Clotbur
 Description

Fruticose biennials, not spiny. Hairs both glandular, subsessile, and eglandular, cottony, cobwebby, or felted. Lvs alternate, petiolate, simple. Capitula homogamous, globose or broadly ovoid, in racemes or corymbs. Involucral bracts in several series, linear, imbricate, glabrous or with cobwebby hairs, the outer recurved at fruiting; margins denticulate or glabrous; apex spinous, inwardly hooked. Receptacle flat, with stiff, linear-subulate scales. Florets ☿, all tubular. Corolla glabrous or glandular, 5-lobed, purplish or white. Anthers acuminate at apex, sagittate at base; filaments glabrous. Style branches linear, cuneate, erect, not appressed. Achenes oblong to obovoid, compressed, rugose; achene insertion basal; pappus hairs in several unequal rows, stiff, pale, scabrid, free to base.

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

 Biostatus
Exotic
Number of species in New Zealand within Arctium L.
CategoryNumber
Exotic: Fully Naturalised2
Total2
 Bibliography
Linnaeus, C. 1753: Species Plantarum. Impensis Laurentii Salvii, Stockholm.
Mabberley, D.J. 2008: Mabberley's plant book, a portable dictionary of plants, their classification and uses. Edition 3. Cambridge University Press.