Aspidosperma gomezianum A.DC.

Castello, Ana Carolina Devides, Pereira, Andreza Stephanie De Souza, Shimizu, Gustavo Hiroaki, Zuntini, Alexandre Rizzo, Simões, André Olmos & Koch, Ingrid, 2022, Taxonomy and nomenclature of Aspidosperma (Apocynaceae), Phytotaxa 571 (3), pp. 239-277 : 253

Aspidosperma gomezianum A.DC. , Prodr. [A.P. de Candolle] 8: 397. 1844.

≡ Macaglia gomeziana (A.DC.) Kuntze, Revis. Gen. Pl. 2: 416. 1891.

Lectotype (designated here): — BRAZIL. Rio de Janeiro: Ad montes Serra dos Órgãos , Jul 1837, G. Gardner 835 ( K [barcode K000587651 image!]; isolectotypes: E [barcode E00259702 image!], G [barcode G00169304 image!, barcode G00169305 image!], GH [barcode 02178699 image!],, NY [barcode 01921303 image!, barcode 00023368 image!], P, US [barcode 00111797 image!], W [No. 1889-0164179 image!]) .

= Aspidosperma obscurum Müll.Arg. in Mart. & auct. suc., Fl. Bras. 6(1): 48. 1860. ≡ Macaglia obscura (Müll.Arg.) Kuntze, Rev. Gen. Pl. 2: 416. 1891. Lectotype (designated here): — BRAZIL. s.d., J.B.E. Pohl 4314 (BR [barcode 0000006956127 image!]; isolectotype: W [No. W0051381 image!]), syn. nov.

“ Aspidosperma pitiae ” Casaretto in Mart. & auct. suc., Fl. Bras. 6(1): 45. 1860, pro syn.

Notes —The collection “Gardner 855” cited by A.L.P.P. de Candolle (1844) in the protologue of A. gomezianum actually corresponds to a gathering of Poaceae . The correct citation for the type of A. gomezianum is Gardner 835. Also, according to Gardner’s “Catalogue of Brazilian Plants” ( Hind 2012), the collection of A. gomezianum was made in 1837. In the preface of his “ Prodromus ”, A.P. de Candolle (1824) stated that all specimens from his personal herbarium were identified with the sign “ v. s. ” (i.e., vidit sicco) ( Ferrer-Gallego & Laguna 2018). We believe that A.L.P.P. de Candolle (1844) followed the same idea, as the single gathering cited in the protologue of A. gomezianum (Gardner 835) was indicated as “ v.s. comm. a cl. Ildef.-Gomez ”. However, despite the specimens from the de Candolle family collection being incorporated into the herbarium G, recognized by the acronym G-DC, none of the sheets from this gathering found in G bear the label “G-DC”. Thus, since the holotype of A. gomezianum is missing, we selected as the lectotype the only specimen with follicles (K barcode K000587651) (ICN article 9.3; Turland et al. 2018). Also, Müller-Argoviensis (1860a) indicated the gathering Pohl 4314 in the prologue of A. obscurum but did not cite in which herbarium the type would be deposited. Thus, we selected the most complete specimen from this collection as the lectotype of A. obscurum (BR barcode 0000006956127) (ICN article 9.3; Turland et al. 2018).

Moreover, Woodson (1951) and Elsam et al. (2021) considered A. gomezianum as a synonym of A. tomentosum Mart. & Zucc. However , we accept A. gomezianum because it presents non-suberous branches (vs. suberous), petiolate and glabrous leaves (vs. sessile and tomentose), and flowers with calyx lobes covering the entire length of the corolla tube (vs. covering up to half or upper third). Also, A. gomezianum occurs only in Atlantic Forest inselbergs, while A. tomentosum occurs throughout the Cerrado. Also, after analyzing A. obscurum protologue and lectotypes, we verified that A. obscurum and A. gomezianum have leaves with eucamptodromous venation, that are concentrated at the branch apex, flowers with tomentose and narrowly triangular calyx lobes that covers the entire length of the corolla tube, corolla lobes equal to or longer than the tube (2×), and glabrous ovary. Therefore, we consider A. obscurum as a synonym of A. gomezianum .