Typification of Láng’s names in Polycnemum (Amaranthaceae s. l.) Author Iamonico, Duilio Author Somlyay, Lajos text Phytotaxa 2014 2014-12-10 188 2 118 120 http://dx.doi.org/10.11646/phytotaxa.188.2.6 journal article 10.11646/phytotaxa.188.2.6 1179-3163 5147225 Polycnemum verrucosum Láng (1824: 179) . Lectotype (designated here):― HUNGARY . “Habitat in plagis arenosis, aridis, comitatus Pestiensis, Cumaniae, Faszygiae”, s.d., A . F . Láng s.n. ( BP 707552!) (Fig. 2). ≡ Polycnemum arvense var. verrucosum (Láng) Oborny (1884: 334) . FIGURE 1 . A. Lectotype of Polycnemum heuffelii Láng (BP 707539!). B. Lectotype of Polycnemum verrucosum Láng (BP 707552!). Láng (1824: 179) described Polycnemum verrucosum from Hungary “… in plagis arenosis, aridis, comitatus Pestiensis, Cumaniae, Faszygiae ”. This provenance covers a fairly large part of the Great Hungarian Plain, namely the territory of historical Pest County , the regions of Kunság (“ Cumania ” in Latin; the present-day Kis- and Nagykunság) and Jászság (“ Iazygia ”, “ Jazygia ”, or “ Jaszygia ” in Latin; the version “ Faszygia ” appearing in the protologue is an orthographic error). Three relevant specimens were traced, two found at W (both indicated as “ syntypus ” by R . Masson and J . Walter in 2013), and one at BP . The specimen W-1889-0266487 (image at http://jacq.nhm-wien.ac.at/djatoka/jacq-viewer/ viewer.html?rft_id=w_18890266487&identifiers=w) bears a label reading “ Polycnemum verrucosum (mihi) Láng [Láng’s script] Auf Steppen in Pester C . [probably Reichenbach’s script]”. Indeed, this specimen comes from the herbarium of the younger Reichenbach who likely received it from his father (see Burns-Balogh 1988 ). Apparently, it was the elder Reichenbach who got the specimen from Láng (see Reichenbach 1832: 583 ), but the date of collection is unknown. The specimen W-0026899 (image at http://jacq.nhm-wien.ac.at/djatoka/jacq-viewer/viewer.html?rft_id=w_ 0026899&identifiers=w_0026899) bears two individuals (plus three branches), accompanied by two original labels by Láng, thus representing two gatherings (from the herbaria of I . I . Schiffer and E . Fenzl, respectively). Although the texts on the labels match the protologue, since the collection dates are lacking, it cannot be ascertained whether these specimens are pre-1824 or not. Therefore, we prefer to consider all the specimens in W as not being original material. Fortunately, the specimen BP-707552 (from Sadler’s herbarium) is unequivocally part of the original material, representing a single gathering and bearing two labels with the original annotations by Láng. The text of the right-hand label (“ Polycnemum verrucosum (mihi)… In plagis arenosis C . [Cottus] Pestiensis Cumaniae Jaszygiae ”) includes a detailed description, and a reference to an article (“ Descrip. vide Bot. [Botanische] Zeit. [Zeitung] 823 [1823]”) in which Láng apparently intended to introduce his new species. The fact that this article was eventually published without a description ( Láng 1823: 27 ) proves that the label was written by Láng before 1824. The left-hand label bears a reference to the protologue (“ Vid. Syl. pl. nov. ”), and probably was added subsequently to the sheet. All things considered, since the specimen BP-707552 seems to be the only certain original material, fully corresponding to both the protologue and the current concept of the species (e.g., Ball 1993 , Iamonico 2013 ), it is designated here as the lectotype of the name P. verrucosum .