Aspidosperma compactinervium Kuhlm., Anais

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 : 246

Aspidosperma compactinervium Kuhlm., Anais Reunião Sul-Amer. Bot. 3: 87. 1940.

Lectotype (first-step lectotype designated by Woodson in Ann. Missouri Bot. Gard. 38(2): 172. 1951; second-step lectotype designated here):— BRAZIL. Rio de Janeiro: Avellar , Mar1933, G.M.Nunes s.n. [Nunes [26972],Serviço de Reflorestamento da E.F.C.Brasil] ( RB [barcode 00535027 !]; isolectotypes: MO [barcode MO-2958573 image!], R [barcode R000026972!]).

= Aspidosperma pruinosum Markgr. in Notizbl. Bot. Gart. Berlin-Dahlem 15(1): 132. 1940. Lectotype (first-step lectotype designated by Woodson in Ann. Missouri Bot. Gard. 38(2): 172. 1951; second-step lectotype designated here):— BRAZIL. Rio de Janeiro: Tijuca, 19 Oct 1880, A. Glaziou 12076 (K [barcode K000587686 image!]; isolectotypes: BR [barcode 0000005783274 image!], C [barcode C10023144 image!, barcode C10023145 image!], P [barcode P00645109 image!, barcode P00645110 image!, barcode P00645111 image!]), syn. nov.

Notes —Kuhlmann presented the species A. compactivervium at the first South-American Botanical Meeting (October 12–19 th, 1938). Still, this name was officially published in 1940 in the third volume of the “Anais da Primeira Reunião Sul-Americana de Botânica” ( Kuhlmann 1940). That same year, Markgraf (1940) published the name A. pruinosum , which we believe is the same taxon of A. compactivervium . However, despite our search, we could not determine which of these two names was first published. Thus, we adopted here the name most commonly applied for the taxon, i.e., A. compactivervium .

Among the three gatherings mentioned in the protologue of A. compactinervium by Kuhlmann (1940), Woodson (1951) cited “Nuñes 26972” (Nunes s.n., herbarium R No. 26972) as the type. However, since this gathering has more than one specimen, it was necessary to narrow Woodson’s (1951) typification electing as the second-step lectotype of A. compactinervium a material from a Brazilian herbarium (RB barcode 00535027) (ICN article 9.17; Turland et al. 2018). We did the same for A. pruinosum , as the gathering Glaziou 12076 chosen by Woodson (1951) from the two collections presented by Markgraf (1940) also has more than one specimen. Therefore, we selected the material with flowers and follicles as the second-step lectotype of A. pruinosum (K barcode K000587686) (ICN article 9.17; Turland et al. 2018).

Woodson (1951) synonymized A. compactinervium and A. pruinosum under “ A. eburneum ”. However, we observed that “ A. eburneum ”, in addition to not being validly published, corresponds to A. olivaceum Müll.Arg. (see the species notes). In our study, we consider A. pruinosum a synonym of A. compactinervium since their diagnostic features overlap, such as the leaves with brochidodromous venation and numerous secondary veins (ca. 30–34), flowers with glabrous ovary, and verrucose follicles.