Classification
Class
Magnoliopsida Brongn.
Order
Asterales Link
Family
Compositae Giseke
Genus
Euchiton Cass.
 Nomenclature
Scientific Name:
Euchiton japonicus (Thunb.) Holub, Folia Geobot. Phytotax. 9: 271 (1974)
Synonymy:
  • ≡ Gnaphalium japonicum Thunb., Fl. Jap. (Thunberg) 311 (1784)
  • = Gnaphalium collinum Labill., Nov. Holl. Pl. 2, 44, t. 189 (1806) nom. illeg., non Gnaphalium collinum Salisb. 1796
  • ≡ Euchiton collinus Cass., Dict. Sci. Nat. 56: 216 (1828)
  • ≡ Gnaphalium japonicum var. collinum (Labill.) Maiden & Betche, Census N.S.W. Pl. 204 (1916)
  • = Gnaphalium gymnocephalum DC., Prodr. [A. P. de Candolle] 6, 235 (1837 [1838])
  • ≡ Euchiton gymnocephalus (DC.) Holub, Folia Geobot. Phytotax. 9: 271 (1974)
  • ≡ Euchiton gymnocephalus (DC.) Anderb., Opera Bot. 104: 167 (1991) nom. illeg., non Euchiton gymnocephalus (DC.) Holub 1974, nom. superfl.
  • = Gnaphalium collinum var. α billardierei Hook.f., London J. Bot. 6: 121 (1847)
  • = Gnaphalium oblancifolium Elmer (1906)
 Description

Stoloniferous perennial; stems 1–3–(6), ascending, simple, 6–25–(40) cm tall. Lvs mostly basal at flowering; basal lvs usually long-petiolate, densely white-tomentose on lower surface usually not including mid-vein, glabrous and shiny on upper (sometimes sparsely to moderately tomentose when young), plane, oblanceolate to narrow-elliptic, long-cuneate, subacute to acute, mucronate, 30–190 × 3–10–(20) mm; cauline lvs becoming slightly or not reduced upwards, often lanceolate or narrow-elliptic, apetiolate and broad-based. Capitula 1.5–2 mm diam., 10-numerous in dense ± globular terminal clusters, very rarely smaller axillary clusters below; longest subtending lvs 1–3× diam. of cluster. Involucral bracts oblong, obtuse to subacute, 3.5–4.5 mm long; stereome green; lamina pale brown, with dark band at base; gap and rarely upper margin bright reddish purple. Achenes minutely papillate, c. 0.8 mm long.

[From: Webb et al. (1985) Flora of New Zealand. Volume 4 as Gnaphalium gymnocephalum DC.]

 Biostatus
Indigenous (Non-endemic)
 Bibliography
Anderberg, A. A. 1991: Taxonomy and phylogeny of the tribe Gnaphalieae (Asteraceae). Opera Botanica 104: 1–195.
Cassini de, A. H. G. 1828: Dictionnaire des Sciences Naturelles 56
Connor, H.E.; Edgar, E. 1987: Name changes in the indigenous New Zealand flora, 1960–1986 and Nomina Nova IV, 1983–1986. New Zealand Journal of Botany 25: 115–170. [as Euchiton collinus Cass.; Gnaphalium collinum Labill.; Gnaphalium gymnocephalum DC.]
de Candolle, A.P. 1838 ("1837"): Prodromus Systematis Naturalis Regni Vegetabilis. Vol. 6. Treuttel et Würtz, Paris.
de Lange, P.J.; Rolfe, J.R.; Barkla J.W.; Courtney, S.P.; Champion, P.D.; Perrie, L.R.; Beadel, S.N.; Ford, K.A.; Breitwieser, I.; Schönberger, I.; Hindmarsh-Walls, R.; Heenan, P.B.; Ladley, K. 2018: Conservation status of New Zealand indigenous vascular plants, 2017. New Zealand Threat Classification Series. No. 22. [Not Threatened]
de Lange, P.J.; Rolfe, J.R.; Champion, P.D.; Courtney, S.P.; Heenan, P.B.; Barkla, J.W.; Cameron, E.K.; Norton, D.A.; Hitchmough, R.A. 2013: Conservation status of New Zealand indigenous vascular plants, 2012. New Zealand Threat Classification Series 3. Department of Conservation, Wellington. [Not Threatened]
Drury, D. G. 1972: The Cluster and Solitary-headed Cudweeds Native to New Zealand: (Gnaphalium Section Euchiton-Compositae). New Zealand Journal of Botany 10: 112–179. [as Euchiton collinus Cass.; Gnaphalium collinum Labill.; Gnaphalium collinum var. α billardierei Hook.f.; Gnaphalium gymnocephalum DC.; Gnaphalium japonicum var. collinum (Labill.) Maiden & Betche; Gnaphalium oblancifolium Elmer]
Flann, C. 2010: Morphometric study of Euchiton (Gnaphalieae: Asteraceae). Australian Journal of Botany 23: 285–305.
Holub, J. 1974: New Names in Phanerogamae 3. Folia Geobotanica et Phytotaxonomica 9(3): 261–275.
Hooker, J.D. 1847: Florae Tasmaniae Spicilegium; or Contributions towards a Flora of Van Diemen's Land. London Journal of Botany 6: 106–125, 265–286, 461–479.
Labillardière, J.J.H. de 1806–1807: Novae Hollandiae Plantarum Specimen. Vol. 2. Huzard, Paris.
Maiden, J.H.; Betche, E. 1916: A census of New South Wales plants. W.A. Gullick Government Printer, Sydney.
Thunberg, C.P. 1784: Flora Japonica sistens plantas insularum japonicarum... Mülleriano, Leipzig.
Ward, J.M.; Breitwieser, I. 1998: New combinations in Euchiton (Compositae - Gnaphalieae) from New Zealand. New Zealand Journal of Botany 36(2): 303–304. [as Euchiton collinus Cass.; Euchiton gymnocephalus (DC.) Anderb.; Euchiton gymnocephalus (DC.) Holub]