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Chersodoma Phil., Anales Mus. Nac. Chile 1891: 33 (1891).

Senecio L. subgen. Dioicosenecio Cabrera, Lilloa 5(1): 68 (1939), nom. nud.

Senecio L. sect. Diclini Cabrera, Lilloa 5(1): 73 (1939). Type: not stated.

Chersodoma Phil. subgen. Diclinanthus B. Nord., Opera Bot. 44: 22 (1978). Type: Chersodoma antennaria (Wedd.) Cabrera

Type: Chersodoma candida Phil.

References

Cabrera, A. L. (1946). Rehabilitacin del g nero Chersodoma Philippi (Compositae). Revista Mus. La Plata, Secc. Bot. 6: 343355.

Nordenstam, B. (1978). Taxonomic studies in the tribe Senecioneae (Compositae). Opera Bot. 44: 2223.

Dillon, M. O. & A. Sagstegui-Alva. (1997). Revision of the dioecious genus Chersodoma Phil. (Senecioneae, Asteraceae), including a new species and status change. Brittonia 48(4): 582604.

Key to species

1. Low erect shrubs; capitula very short-pedicellate; phyllaries 5Y-10 (subgen. Chersodoma) 2

Perennial herbs, rhizomatous, with stoloniferous stems and rosettiform leaves; capitula solitary on long scapes or subsessile; phyllaries 18 (subgen. Diclinanthus) C. antennaria

2. (1) Leaves ovate or orbicular, with 23 pairs of teeth C. candida

Leaves lanceolate or elliptic, entire or with one tooth C. jodopappa

*Chersodoma antennaria (Wedd.) Cabrera, Revista Mus. La Plata 6: 352 (1946).

Senecio antennaria Wedd., Chloris Andina 1: 106 (1856). Types: Hab. Prou: sur les sommit s de la Cordillre dAyapata!, province de Carabaya (Lechler, exsic.., no. 1943). '- Bolivie: creux des rochers, au sommet de la Cordillre de Sorata!, sur le chemin de Tipuani, h. 5100 m tres (Wedd.). Syntypes: P. Lectotype (selected by Dillon & Sagstegui-Alva, 1996: 595): PERU. Dept. Puno: Prov. Carabaya, '"Sur les sommits de la Cordillere dAyapata,'" Lechler 1943 F(9972551); isolectotype: K, P.

Senecio antennaria Wedd. [var.] b caulescens Wedd., Chloris Andina 1: 106 (1856). Type: Culcitium lechleri Schultz Bip., in Bonplandia, ann. 1856, p. 52 see also S. antennaria for all material cited after the species.

Senecio diclinus Wedd., Chloris Andina 1: 107 (1856). Type: Hab. Prou! (Dombey). Holotype: P.

Culcitium lechleri Sch.Bip., Bonplandia 4(4): 55 (1856), nom. nud., based on Lechler 1943.

Senecio pellitus A. Gray, Proc. Amer. Acad. Arts 5: 143 (1861). Type: ''High Andes of Peru near Casa Cancha. [Collections made on the United States South Pacific Exploring Expedition under Captain Wilkes]. Holotype: US (1121674); isotypes: GH pp., K, US (1121687).

Senecio diclinus Wedd. var. glabriusculus Cabrera, Notas Mus. La Plata, Bot. 1(No. 4): 96 (1935). Type: [Argentina: ] La Rioja: en las cercanas del Potrerillo, lado del Poniente del Cerro Famatina, leg. G. Hieronymus et G. Niederlein, no 698, 14-II-1879. Holotype: BD.

Chersodoma antennaria (Wedd.) Cabrera var. caulescens (Wedd.) Cabrera, Bol. Soc. Argent. Bot. 1(1): 352 (1946).

*Chersodoma diclina (Wedd.) Cabrera, Revista Mus. La Plata 6: 353 (1946).

Chersodoma diclina (Wedd.) Cabrera var. glabriuscula (Cabrera) Cabrera, Bol. Soc. Argent. Bot. 1(1): 355 (1946).

Argentina, Bolivia (La Paz), Peru.

Chersodoma antennaria (Wedd.) Cabrera var. caulescens (Wedd.) Cabrera, Bol. Soc. Argent. Bot. 1(1): 352 (1946) = Chersodoma antennaria (Wedd.) Cabrera

*Chersodoma candida Phil., Anales Mus. Nac. Chile, Secc. 2, Bot. 8: 33 (1891). Type: ''Inter Amincha et Paroma lecta. Lectotype (selected by Dillon & Sagstegui-Alva, 1996: 593): CHILE. Antofagasta (Regi n II): Prov. Antofagasta, entre Amincha y Paroma, 25 Feb 1885, F. Philippi 2055 - SGO (44623); isolectotypes: LP (59683), SGO (59961), SI (10010).

Senecio oxydon Phil., Anales Univ. Chile 114: 179 (1904). Type: Habitat prope Calcalhuay. Lectotype (selected by Dillon & Sagstegui-Alva, 1996: 593): CHILE. Tarapac (Regin I): Prov. Iquique, Calcalhuay [1950S, 68'20W], Jan 1886, C. Rahmer s.n. SGO 44424; isolectotypes: LP 59684, SGO 60778.

Senecio chersodoma Reiche, Anales Univ. Chile 114: 189 & 261 (1904), nom. nud. based on C. candida Phil.

Argentina, Bolivia (Oruro, Potos), Chile.

*Chersodoma diclina (Wedd.) Cabrera, Revista Mus. La Plata 6: 353 (1946) = Chersodoma antennaria (Wedd.) Cabrera.

Chersodoma diclina (Wedd.) Cabrera var. glabriuscula (Cabrera) Cabrera, Bol. Soc. Argent. Bot. 1(1): 355 (1946) = Chersodoma antennaria (Wedd.) Cabrera.

*Chersodoma jodopappa (Sch.Bip.) Cabrera, Revista Mus. La Plata 6: 350 (1946). [Cited by Foster (1958: 206) as iodopappa''].

Senecio jodopappus Sch.Bip., Bonplandia 4(4): 51 (1856). Type: not cited, although in the contemporaneous paper by Hohenacker (1856: 55) it is clear this is Lechler 1706.

Note: Although Cabrera (1946) clearly combined Schultz Bipontinus name under Chersodoma he noted nominum nudum after the place of publication, which is clearly incorrect. Dillon & Sagstegui-Alva (1996: 594) ignored this noting the basionym as Senecio jodopappus Sch.Bip. ex Wedd., Chloris Andina 1: 116 (1856)''. The account in Chloris Andina would suggest that the types should be selected from S. jodopappus Schultz Bip., in Bonplandia, ann. 1856, p. 51. Hab. Prou: sur les rochers, dans le voisinage du lac de Titicaca!, h. 3900 m tres (Lechler, exsicc., 1706 et 1755, Wedd.). Dillon & Sagstegui-Alva, 1996: 594) selected a lectotype PERU. Dept. Puno: '"Sur les rochers, dans le voisinage du lac de Titicaca, h. 3900 m, W. Lechler 1706 F (972556); isolectotypes: NY, P. This is unnecessary. Duplicates of Lechler 1706 and 1755, in a distribution determined by Schultz Bipontinus, are in K.

Argentina, Bolivia (La Paz, Oruro, Potos, Tarija), Chile, Peru.