Synopsis of Senecio series Culcitium (Asteraceae: Senecioneae, Senecioninae) in the Andean region of South America

FREIRE, SUSANA; SALOMÓN, LUCIANA; SKLENÁR, PETR

Phytotaxa

Magnolia Press

Año: 2018 vol. 340 p. 1 - 47

1179-3155

Based on a detailed study of morphology and a critical analysis of species limits, we present a synopsis of Senecioser. Culcitium from Andean South America. In this synopsis, Senecio ser. Culcitium is circumscribed includingAetheolaena and Lasiocephalus, two genera which are nested within Senecio. Forty three species are recognized inS. ser. Culcitium that are either rosette or scapiform herbs or subshrubs (sometimes scandent) bearing usually entireleaves, discoid and nodding capitula usually with conspicuous calycular bracts, penicillate style arms with or withouta tuft of long hairs, and microechinate pollen. The new combination Senecio hyoseridis is proposed. The followingnames are proposed as synonyms: Senecio comosus var. debilis and S. comosus var. blancus with S. comosus; Seneciocuencanus var. tomentella with S. cuencanus; Senecio decolor, S. iscoensis and S. rosanus with Senecio antisanae,Senecio eliseae with S. rhizomatus; Senecio hypsobates var. parvulus with S. hypsobates; Senecio mochensis withS. pindilicensis; Senecio modestus with S. candollei; Senecio neeanus and S. haenkeanus with S. nivalis; Senecioquitensis with S. superandinus; Senecio santanderensis with S. cocuyanus; Senecio yacuanquensis with S. otophorus;Senecio zoellneri with S. keshua. Ten species previously placed in Senecio ser. Culcitium, i.e., S. aspleniifolius, S.candidans, S. comosus, S. diemii, S. gilliesii, S. jarae, S. julianus, S. magellanicus S. martinensis and S. stylotrichus,are excluded. Two of them, Senecio gilliesii and S. candidans are placed within Senecio ser. Hualtatini mainly by theirherbaceous habit, stems usually leafy up to the apex, and erect capitula. Senecio jarae and S. aspleniifolius are placedin a new series based on the previously described Senecio sect. Repentes because of their solitary erect capitula andentire or deeply lobed leaves. Lectotypes are designated for 13 names. Additionally, 11 new illustrations, distributionmaps, and identification keys are presented.