Senecio casapaltensis Ball, J. Linn. Soc., Bot. 22: 47. 1885.

Calvo, Joel, Granda, Arturo & Funk, Vicki A., 2019, New combinations and synonyms in discoid caespitose Andean Senecio (Senecioneae, Compositae), PhytoKeys 132, pp. 111-130 : 125-126

1. Senecio casapaltensis Ball, J. Linn. Soc., Bot. 22: 47. 1885.

Senecio sanmarcosensis H. Beltrán, Arnaldoa 15: 211. 2009. Type: Peru. Ancash: Huari, San Marcos, Ccolla Chica, 09°40'28"S, 77°03'10"W, 5600 m, 4 May 2008, H. Beltrán 6476 (holotype: USM [USM-00277272]; isotypes: CUZ n.v., HUT n.v.), syn. nov.

Senecio repens var. taraxacifolius A. Gray [ “taraxicifolius”], nom. nud. in sched. ( Turland et al. 2018, ICN Art. 38.1) (US [US00829056]).

Type.

Peru. Lima: supra Casapalta, 4265-4360 m, 22 Apr 1882, J. Ball s.n. (lectotype, designated here: K [K000497782]; isolectotype: E [E00417028]).

Discussion.

Senecio casapaltensis Ball was described from central Lima near the border between Lima-Junín departments, whereas the type material of S. sanmarcosensis H. Beltrán comes from southeastern Ancash Department. After studying several specimens from both regions, we can conclude that the differences concerning the shape and size of the leaves are not significant. The populations from Ancash tend to have a denser indumentum composed of capitate trichomes, whereas those specimens from Lima are glabrescent or the indumentum is rather deciduous and composed of shorter glandular trichomes. Nonetheless, the existence of intermediate specimens makes their recognition as distinct species inadvisable and, therefore, S. sanmarcosensis is here synonymized with S. casapaltensis .

Among the located original material of S. casapaltensis , the specimen at K is designated as the lectotype due to it being more complete than the duplicate at E.