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Pycnocephalum (Less.) DC., Prodr. 5: 83 (1836).

Vernonia Schreb. sect. Pycnocephalum Less., Linnaea 6: 629 (1831). Type: Not stated. Lectotype (selected by MacLeish, 1985: 461): Vernonia plantaginifolia Less. = Pycnocephalum plantaginifolium (Less.) DC.

Chresta DC. sect. Pycnocephalum (Less.) Gardner, London J. Bot. 1: 240 (1842).

Eremanthus Less. sect. Pycnocephalum (Less.) Baker in Mart., Fl. Bras. 6(2): 168 (1873).

Lectotype (selected by MacLeish, 1985: 461): Pycnocephalum plantaginifolium (Less.) DC.

References

Gardner, G. (1842). Characters of three new species of Chresta; with remarks on the identity of Pycnocephalum and Chresta. London J .Bot. 1: 238241 & tab. VIII & IX.

MacLeish, N. F. F. (1985). Revision of Chresta and Pycnocephalum (Compositae: Vernonieae). Syst. Bot. 10(4): 459470.

Pycnocephalum angustifolium (Gardner) MacLeish, Syst. Bot. 10(4): 462 (1985).

Chresta angustifolia Gardner, London J. Bot. 1: 240, t. 8 (1842). Type: [Brazil: ] Gardn. Herb. Brasil. n. 3802. ... Hab. In umbrosis montosis apud Villa de Arrayas Provinci Goyazan Brasili, florens Aprili. Holotype (noted by MacLeish, 1985: 462): BM; isotypes: F, G æ'´ 3, K, NY, P, S, W. Note: Since Gardner wrote the paper citing clearly at the end Kew, April, 1842. he would have had access to both his own material and that in Hookers private herbarium, now known as herb. Hookerianum forming part of the general collections in K. This would preclude categorically calling the BM specimen the holotype.

Eremanthus angustifolius (Gardner) Baker in Mart., Fl. Bras. 6(2): 170 (1873).

Eremanthus rivularis Taub., Bot. Jahrb. Syst. 21(4): 453 (1896). Type: [Brazil:] Habitat secus rivos in ditione fluminis Maranho superioris: Ule n. 2962. Flor. m. Sept.ã-' Holotype: B.

Bolivia (Santa Cruz), Brazil.

Pyrethrum parthenium (L.) J. E. Smith, Fl. Brit. 2: 900 (1800) = Tanacetum parthenium (L.) Sch.Bip.