Phytotaxa 411 (3): 205–214 https://www.mapress.com/j/pt/ Copyright © 2019 Magnolia Press Article PHYTOTAXA ISSN 1179-3155 (print edition) ISSN 1179-3163 (online edition) Accepted by Jaideep Mazumdar: 17 Jul. 2019; published: 23 Jul. 2019 https://doi.org/10.11646/phytotaxa.411.3.4 205 Typification and nomenclatural clarifications of names related to the genus Nototriche (Malvaceae) ANA M. CIALDELLA & NATALY O’LEARY Instituto de Botánica Darwinion (ANCEFN-CONICET), Labardén 200, CC 22, B1642HYD San Isidro, Buenos Aires, Argentina; E-mail: anacialdella@darwin.edu.ar Abstract Twenty-six lectotypes (including one as a second step designation, and another as an holotype to be corrected to lectotype, according to Art. 9.10 of the ICN, Turland et al. 2018) and two neotypes are here proposed for twenty-eightnames related to the genusNototriche, as part of the ongoing study on the genus for the South American flora. Notes about typifications are provided. Keywords: Nototriche; Malvaceae; lectotypification Introduction Nototriche Turczaninow (1863: 567) is a southamerican genus, distributed in the Andean regions from Ecuador, Perú, Chile, Bolivia and Argentina, between 3500 and 5000 m above sea level. The genus includes approximately 130 species with the highest diversity in Perú, where 65 species have been reported (Chanco & Ulloa Ulloa 2004: 693). Nototriche plants are cushion hemicriptophytes, with apparently acaulescent habit, with rosette leaf disposition, and thick, woody, underground caudex (Hill 1909: 201). Leaf lamina morphology is very variable.A 5-lobed palmate lamina is assumed to be the ancestral state (Hill 1909: 203),which is retained in many species. A series of forms, appearto have developed by secondary and tertiary lobing or subdivision of some or all of the original five lobes. Furthermore, in some species the lobing is only carried to the middle of the lamina, whilst in other species the lamina is dividedalmost to the base.This latter tendency culminates in forms in which the lamina is dissected into a large number of linear segments (Hill 1909: 203–204). The leaf surface is glabrous to densely covered by stellate hairs. The flowers are gamosepalous and gamopetalous; the numerous stamens display the ordinary Malvaceous arrangement, with their filaments united in a column;the styles, usually numerous, are capped with papillate stigmas. The fruits are schizocarps, and the seeds are irregularly reniform and often show a longitudinal dorsal furrow. Nototriche is frequently identified by the absence of the involucral bracts or epicalyx, and the fusion of stipules to the petiolar base, forming a sheat in which the short peduncle of the solitaty flower is inserted (Krapovickas 2003). The genus was deeply studied by A.W. Hill (1875–1941), a British botanist, who worked as the assistant of the director of the Royal Botanic Gardens, Kew (1907–1922), and then as director up to 1941. He visited several herbaria (B, P, and others), in order to study different plant collections. He published many new species of Nototriche (1906), including a detailed explanation about the type material on which the genus was based (1906: 576–577). He also revised the whole genus (1909), proposed a key to identify the 62 recognized species, photographs and drawings of the characters with taxonomic value; this revision was followed by other contributions (Hill 1928, 1932, 1933). At the time of his death, Hill was working with B.L. Burtt on a new account of the genus Nototriche, which was published then by Burtt in 1948. Subsequently, several authors also worked in Nototriche, they recognized new species and contributed to identify differencial characters (Krapovickas 1950, 1951, 1952, 1953, 1957, 1973, 1988, 1990, 1999, 2003; Fryxell & Krapovickas, 1990; Chanco, 1992). As part of the ongoing taxonomical studies on Nototriche for the Flora Argentina Project (Zuloaga & Anton, ined.), several names were identified to need typification or nomenclatural clarifications.