Solanum endoadenium
n = ploidy missing =12 voucher missing = (Moscone 1992)
In forests on the eastern Andean slopes in central to northern Argentina, from 1500-3000 m.
Solanum endoadenium is a member of the Dulcamaroid clade (sensu Weese & Bohs, 2007) with terminal inflorescences and pedicels inserted into small sleeves that leave pegs on the inflorescence axis. Morton (1976) included it in his section Dulcamara, as did Bitter (1913) in describing it. This species has not yet been included in molecular analyses.
Bitter, G. 1913. Solana nova vel minus cognita XIII.
Repert. Spec. Nov. Regni Veg. 12: 542-555.
Morton, C.V. 1976. A revision of the Argentine species of Solanum.
Pp. 1-260. Academia Nacional de Ciencias, Córdoba, Argentina.
Moscone, E.A. 1992. Estudios de cromosomas meióticos en Solanaceae de Argentina.
Darwiniana 31: 261-297.
Weese, T.L. & L. Bohs 2007. A Three-Gene Phylogeny of the Genus Solanum (Solanaceae)
Syst. Bot. 32(2): 445-463.
Unlike many of the members of the Dulcamaroid clade, S. endoadenium is a shrubby species and is apparently never a vine or even scandent. The leaves are consistently simple, and apparently never lobed or pinnatifid. Solanum endoadenium is easily recognised by its purple flowers, orange fruits and dense, often glandular-viscid pubescence of simple trichomes. The older stems are warty from the persistent leaf bases; this distinctive character distinguishes S. endoadenium from the somewhat similar S. salicifolium from the same region. Solanum endoadenium is further easily distinguished from S. salicifolium by its larger, usually branched inflorescences and more spreading pubescence (rather than appressed-ascending).
Leaf size in S. endoadenium is quite variable, and varies within as well as between individuals. In general leaves near the stem tips are smaller than those lower down. Bitter (1913) stated that the epithet was derived from the glandular pubescence on the inside of the filaments.
Morton (1976) lectotypified S. endoadenium with the only syntype (of seven in Bitter’s original description) from La Rioja province, as Bitter (1913) stated he was basing his description on material from La Rioja. In his lectotypification, Morton cites the collection as Hieronymus & Neiderlein 746, but the only specimen at G [G00070235] has no collection number, nor do the duplicates at LE and P. Morton’s annotation slip states “isosyntypus” and is dated 1961; he may have made a transcription error later, as this is the only specimen at G that bears this locality and collector information.