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Dyssodia Cav., Descr. Pl. : 202 (1802).

Boebera Willd., Sp. Pl. : 2125 (1804). Type: Boebera chrysanthemoides Willd. = Tagetes papposa Vent. = Dyssodia papposa (Vent.) Hitchc.

Rosilla Less., Syn. Gen. Comp. : 245 (1832). Type: Rosilla lutea Less. = Dyssodia pinnata (Cav.) B. L. Rob.

Syncephalantha Bartl., Ind. Sem. Hort. Goett. : 6 (1836). Type: Syncehpalantha decipiens Bartl. = Dyssodia decipiens (Bartl.) M. Johnston

Dyssodia Cav. sect. Syncephalantha (Bartl.) Strother, Univ. Calif. Publ. Bot. 48: 24 (1969).

Type: Tagetes papposa Vent. = Dyssodia papposa (Vent.) Hitchc.

References

Strother, J. L. (1969). Systematics of Dyssodia Cavanilles (Compositae: Tageteae). Univ. Calif. Publ. Bot. 48: 188.

Strother, J. L. (1986). Renovation of Dyssodia (Compositae: Tageteae). Sida 11(4): 371378.

Dyssodia chrysanthemifolia Steud., Nom. Bot., ed. 2, 2: 660 (1841), nom. superfl., based on Tagetes papposa Vent. = Dyssodia papposa (Vent.) Hitchc.

Dyssodia chrysanthemoides (Willd.) Lag., Gen. Sp. Nov. : 29 (1816) = Dyssodia papposa (Vent.) Hitchc.

Dyssodia ciliosa (Rydb.) Standl., Field Mus. Pub. Bot. 4: 299 (1929) = Dyssodia papposa (Vent.) Hitchc.

*Dyssodia fastigiata DC., Prodr. 5: 640 (1836) = Dyssodia papposa (Vent.) Hitchc.

Dyssodia papposa (Vent.) Hitchc., Trans. Acad. Sci. St. Louis 5: 503 (1891).

Tagetes papposa Vent., Descr. Pl. Nouv. : tab. 36 (June-July 1801). Type: ... dcouverte par Michaux dans le pays des Illinois, introduite chez Cels en lan 5, fleurissant sur la fin de lé''t . Holotype: ?P-MICH.

Boebera chrysanthemoides Willd., Sp. Pl. : 2125 (1804), nom. superfl., based on Tagetes papposa Vent.

Tagetes pumilla Willd., Sp. Pl. : 2126 (1804), nom. nud. pro syn.

Boebera glandulosa (Cav.) Pers., Syn. Pl. 2: 459 (1807). Strother (1969: 27) noted this was based on a frequently listed but non-existent combination attributed by some authors to Cavanilles (1802), illegit.

Dyssodia chrysanthemoides (Willd.) Lag., Gen. Sp. Nov. : 29 (1816).

*Dyssodia fastigiata DC., Prodr. 5: 640 (1836). Types: in Mexici montanis (Alam.!) prope Ario Pazcuaro et lacum Cuiseo (H. et B.). Dyssodia tagetiflora Lag. elench. h. madr. p. 29? Boebera tagetiflora Spreng. l.c.? ... (v.s. comm. cl. Alaman et Berl.). Note: Although there are several sheets bearing the Prodromus name only one has a collectorsÒ' label; this is apparently a Mendez collection, the name of Alaman being crossed out.

Dyssodia chrysanthemifolia Steud., Nom. Bot., ed. 2, 2: 660 (1841), nom. superfl., based on Tagetes papposa Vent.

Boebera papposa (Vent.) Rydb., Man. Fl. N. States & Canada : 1012 (1901).

Boebera ciliosa Rydb., N. Amer. Fl. 34(2): 167 (1915). Type: Type collected at Durango, in 1896, Palmer 920. Holotype: NY.

Boebera roseata Rydb., N. Amer. Fl. 34: 168 (1915). Based on Dyssodia fastigiata DC, non Kunth.

Dyssodia ciliosa (Rydb.) Standl., Field Mus. Pub. Bot. 4: 299 (1929).

Dyssodia roseata (Rydb.) Gentry, Los Pastizales de Durango : 331 (1957).

Argentina, Bolivia (Chuquisaca, Cochabamba, Sucre), Canada, Mexico, USA.

Noted as an aggressive weed in open field and along roadsides in the northern part of its range apparently also typical in Bolivia. Apparently recently introduced in South America. Flowering August to October. (Strother, 1969 : 27).

Dyssodia roseata (Rydb.) Gentry, Los Pastizales de Durango : 331 (1957) = Dyssodia papposa (Vent.) Hitchc.

Echetrosis pentasperma Phil., Anales Univ. Chile 43: 504 (1873) = Parthenum hysterophorus L.

Echinocephalum angustifolium Gardner, London J. Bot. 7: 295 (1848) = Melanthera latifolia (Gardner) Cabrera

Echinocephalum lanceolatum Gardner, London J. Bot. 7: 295 (1848) = Melanthera latifolia (Gardner) Cabrera

Echinocephalum latifolium Gardner, London J. Bot. 7: 294 (1848) = Melanthera latifolia (Gardner) Cabrera

Echinodium prostratum Poit. in Cass., Dict. Sci Nat. 59: 245 (1829), nom. nud. = Acanthospermum australe (Leofl.) Kuntze