Stillingia dusenii Pax & Hoffmann(1924: 202)

Mariaathiê-Souza, Sarah, Melo, André Laurênio De, Silva, Marcos José Da & Sales, Margareth Ferreira De, 2016, New synonyms and typifications of Stillingia (Euphorbiaceae), Phytotaxa 266 (3), pp. 183-194 : 186-188

4. Stillingia bodenbenderi (Kuntze) Rogers (1951: 222) .— Sapium bodenbenderi Kuntze (1898: 292) .— Excoecaria bodenbenderi (Kuntze) Schumann (1900: 349) . Type:— ARGENTINA. Córdoba: Sierra de Córdoba, September 1889, W. Bodenbender 6902 (holotype NY 00273221!, isotype CORD!).

Stillingia dusenii Pax & Hoffmann(1924: 202) , syn.nov. Lectotype (here designated):— BRAZIL. Paraná: Jaguariahyva , in campo, 25 October 1910, P. K. H. Dusén 10440 (S S-R-10753!, isolectotype MO 1105387 !). Remaining syntype:— BRAZIL. Paraná: Jaguariahyva, in campo limpo, 11 October 1911, P. K. H. Dusén 13179 (G 00386182!, S S-R-10752!).

Kuntze (1898) established the species Sapium bodenbenderi based on “ Argentina: Sierra de Cordoba IX 1889, Prof. Dr. Bodenbender legit No. 6902 herbarii kurtziani sub nomine Sapium marginatum ” ( Fig. 3 ). Schumann (1900) transferred this species to Excoecaria without specifying the reasons. Pax & Hoffmann (1912) did not accept the suggestion and maintained the species within their circumscription of the genus Sapium . Subsequently, based on the presence of carpidiophores, Rogers (1951) proposed the new combination Stillingia bodenbenderi and included Sapium subsessile Hemsley (1901 : t. 2684) among its synonyms. After examining the type material stored at NY [the herbarium Kuntziani was incorporated into the collection of NY ( Stafleu & Cowan 1979)], as well as approximately 15 collections related to S. bodenbenderi for the present study, it was possible to confirm the opinion of Rogers (1951).

A detailed analysis of type collections of Stillingia bodenbenderi and S. dusenii ( Fig. 4 ), as well as other specimens from the same type localities, showed no morphological discontinuities to justify the maintenance of these taxa as distinct entities. The arrangement of leaves in brachyblasts, reddish-brown branches, leathery leaves, cartilage on leaf margins, cupuliform basal foliar glands on the abaxial surface, short petioles (up to 2 mm long), and disciform glands in the floral bracts are some of the characters observed in both collections. Both names are validly published and legitimate, although S. bodenbenderi has priority over S. dusenii according to Article 11.4 of the ICN ( McNeill et al. 2012).

Up to this date, Stillingia bodenbenderi was considered as being restricted to the province of Cordoba ( Argentina) and the states of São Paulo and Rio de Janeiro ( Brazil). As a result of the present study, we propose that Stillingia bodendenberi should be considered as vulnerable (VU) according to the IUCN red list ( IUCN 2014), since the extent of its occurrence is estimated to be less than 20,000 km 2. To the best of our knowledge, Stillingia dusenii was restricted to the state of Paraná ( Brazil) and known only from the type collections.

Stillingia dusenii was published by Pax & Hoffmann (1924) based on two syntypes. The specimen Dusén 10440, deposited in S ( Fig. 4 ), was chosen as the lectotype since it is best conserved and in accordance with the protologue. Rogers (1951) mentioned Dusén 10440 but without stating the herbarium where it was deposited.

Figures

FIGURE 3. Isotype of Sapium bodenbenderi Kuntze, W. Bodenbender 6902 (NY 000273221).

FIGURE 4. Lectotype of Stillingia dusenii Pax & Hoffmann, P.K.H. Dusén 10440 (S-R-10753).