Euphorbia paranensis Dusén (1910: 7–8)

Hassemer, Gustavo, Silva, Otávio Luis Marques Da, Funez, Luís Adriano, Ernst, Madeleine, Cordeiro, Inês & Rønsted, Nina, 2017, Updates on the genus Euphorbia (Euphorbiaceae) in Santa Catarina, Brazil, Phytotaxa 298 (3), pp. 222-238 : 230

Euphorbia paranensis Dusén (1910: 7–8)

Lectotype (designated here): — BRAZIL. Paraná: “Iraty, ad marg. viae ferr.”, January 1904, P. K. H. Dusén 3391 ( S- R-10840!; isolectotypes S-07-13001 !, US-95386!) ( Fig. 6 ).

Illustrations: — Fig. 1 in Dusén (1910).

Distribution and habitat: — Euphorbia paranensis grows in high montane habitats, within open vegetation, frequently on slopes with water bodies nearby, being endemic to southern Brazil ( Smith et al. 1988, Berry et al. 2008). In SC this species has been collected in the following municipalities: Bom Retiro, Caçador, Campo Alegre, Campos Novos, Guaraciaba, Lages and São Miguel d’Oeste.

Conservation status: —Near threatened (NT). This is a rather rare species endemic to natural high-elevation grasslands in southern Brazil, which is a type of environment that harbours a very high number of endemic plants ( Anonymous 2002, Overbeck et al. 2007, Boldrini 2009, Iganci et al. 2011), and yet it is generally neglected by environmental authorities and highly threatened with destruction ( Hassemer et al. 2015).

Notes: — The protologue of this name gives the following information for typification purposes:“Auf abgewaldetem Boden in der Nähe von Iratý (4. I. 1904, Nr. 3391)”. Later, Smith et al. (1988: 350) cite the type (as “ Tipo ”) of this species as “Auf abgewaldetem Boden in der Nähe von Iraty (4. I. 1904, No. 3391). Dusén, Paraná,— S ”, therefore choosing S as the deposition collection of the type ; their type designation fails however to elect a single lectotype, because there were two syntypes kept at S (S-R-10840 and S-07-13001 ). Therefore , a further lectotypification step is in order (Art. 9.17; see also Art. 8.3). We designate here one of these two syntypes at S (S-R-10840; Fig. 6 ), which is the best and more complete sheet, as lectotype for this name. Another isolectotype is kept at US (US-95386) .

Material examined: — BRAZIL. Paraná: Guarapuava, Serra da Esperança , 20 October 1960, G. G. Hatschbach 7390 ( MBM) ; Ortigueira, Rodovia do Café , 6 December 1965, G. G. Hatschbach 13220 ( MBM) ; Rio Grande do Sul: São Francisco de Paula , Linha São Paulo, 10 March 2001, R. Wasum 8361 ( MBM) ; Santa Catarina: Areão , 15 January 1964, E. Pereira 8361 ( RB) .

Figures

FIGURE 1. Image of the epitype of Euphorbia cyathophora (MO-3836231). Published with permission of the Missouri Botanical Garden.

FIGURE 6. Image of the lectotype of Euphorbia paranensis (P.K.H. Dusén 3391, S-R-10840). Published with permission of the Naturhistoriska Riksmuseet.