Senecio expansus Wedd., Chlor. Andina 1: 107. 1856.

Calvo, Joel, Granda, Arturo & Funk, Vicki A., 2019, New combinations and synonyms in discoid caespitose Andean Senecio (Senecioneae, Compositae), PhytoKeys 132, pp. 111-130: 126

publication ID

http://dx.doi.org/10.3897/phytokeys.132.38534

persistent identifier

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scientific name

Senecio expansus Wedd., Chlor. Andina 1: 107. 1856.
status

 

2. Senecio expansus Wedd., Chlor. Andina 1: 107. 1856.  

Senecio macrorrhizus   Wedd., Chlor. Andina 1: 108. 1856. Type: Peru. Cusco: dept. de Cuzco, Oct 1839-Feb 1840, C. Gay 1870 (lectotype, designated here: P [P01816797]), syn. nov.

Type.

Bolivia. Potosí: montagnes des lagunas de Potosí, [without date], A. d’Orbigny 1418 (lectotype, designated by Cabrera (1966) as “typus”, pg. 21: P [P01816805]; isolectotypes: BR [BR00000552801], G [G00356020], K [K000497783]).

Discussion.

Senecio macrorrhizus   Wedd. was described from Cusco (Peru) and distinguished from S. expansus   Wedd. mainly by having a thicker, longer, and more sinuous rhizome, larger capitulum, and rosettes less spread out ( Weddell 1856). The mentioned differences fall within the variability encompassed by S. expansus   , and here we synonymize them.

Gay’s specimen P01816797 perfectly matches the protologue information, and therefore, it is designated as the lectotype of the name S. macrorrhizus   .