Isachne salzmannii (Trinius ex Steudel) Renvoize (1984a: 184)

Rodrigues, Rodrigo S., Dórea, Marcos Da Costa, Filgueiras, Tarciso S. & Oliveira, Reyjane Patricia De, 2016, Lectotypification of Panicum salzmannii, basionym of Isachne salzmannii (Poaceae, Micrairoideae), Phytotaxa 246 (2), pp. 155-158 : 157

Isachne salzmannii (Trinius ex Steudel) Renvoize (1984a: 184) . ( Fig. 1 )

Basionym: Panicum salzmannii Trinius ex Steudel (1854: 95) .

First-step lectotype:— BRAZIL. Bahia: without locality, without date, Salzmann s.n. (K), designated by Renvoize (1984a: 184), corrected from “ isotype ”. Second-step lectotype: K-000643013!, here designated. Isolectotypes: K-000004793!, LE-TRIN-0556.01 (fragment and illustration), MO-2099177!, MPU-024600!, MPU-024601!, MPU-024602!, MPU-024603!, MPU-024604!, P-00740915!, P-00740916!, P-00740917!, P-01936067!, P-02382030!, US-975976! (fragment ex P). An image of the K specimens is housed at HUEFS [HUEFS-41943! (image ex K)].

Notes: — Döll (1877) in Flora Brasiliensis erroneously included Panicum salzmannii in the synonymy of Isachne ventricosa ( Lamarck 1791: 173) Döll (1877: 274) , an Asiatic species probably related to the widespread I. globosa (Thunberg in Murray 1784: 109) Kuntze (1891: 778). As stated by Renvoize (1984b), Döll mixed several collections of different Brazilian Isachne (e.g., I. goiasensis , I. polygonoides and I. salzmannii ), and misapplied them to Salzmann’s and Lamarck’s collections. Chase in 1935 [her notes can be found on labels of the specimens she collected housed at P (P-00740917) and RB (RB-78518), and in one specimen collected by Salzmann at MPU (MPU-024601)] and Renvoize (1984b) considered P. salzmannii ( I. salzmannii ) and I. ventricosa as distinct taxa. Despite their determinations, Zuloaga & Morrone (2003a) and Iskandar & Veldkamp (2004) treated I. salzmannii and I. ventricosa as the same species. The synonymy is currently accepted in Tropicos (2016).

The isolectotype P-00740915 is the only sheet with Steudel’s handwriting on it (strongly stricken through) and was used to illustrate the species Isachne ventricosa in Flora Brasiliensis (tab. 35). The illustration is in fact Panicum salzmannii ( I. salzmannii ), as currently recognized.

Figures

FIGURE 1. Photograph of the lectotype [right] of Panicum salzmannii (K-000643013) and an isolectotype [left] (K-000004793), collected by Philipp Salzmann in Bahia, Brazil. (© The Board of Trustees of the Royal Botanic Gardens, Kew. Reproduced with the consent of the Royal Botanic Gardens, Kew). Available from: http://specimens.kew.org/herbarium/K000643013.