Aspidosperma pyricollum Müll.Arg.

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 : 262

Aspidosperma pyricollum Müll.Arg. in Mart. & auct. suc., Fl. Bras. 6(1): 58. 1860.

≡ Aspidosperma pyricollum var. pyricollum . ≡ Macaglia pyricolla (Müll.Arg.) Kuntze , Revis. Gen. Pl. 2: 416. 1891.

Lectotype (first-step lectotype designated by Woodson in Ann. Missouri Bot. Gard. 38(2): 152. 1951; second-step lectotype designated here):— BRAZIL. Rio de Janeiro: 1843, H.A. Weddell 445 ( P [barcode P00639569 image!]; isolectotypes: G (mounted on two herbarium sheets) [barcode G00169350 image!], P [barcode P00639568 image!]) .

= Aspidosperma pyricollum var. obovatum Müll.Arg. in Mart. & auct. suc., Fl. Bras. 6(1): 58. 1860. Lectotype (designated here): — BRAZIL. Rio de Janeiro, circa Rio de Janeiro, 1832, L. Riedel 587 (M [barcode M-0183490 image!]; isolectotypes: W [No. W0057127 image!, No. W0057128 image!]).

= Geissospermum solandri Miers, Apocyn. S. Am. : 85. 1878. Holotype:— BRAZIL. Rio de Janeiro: 1768, J. Banks & G. Solander s.n. (BM [barcode BM000548498 image!]). Excluded: BM [barcode 000548499(BM) image!, barcode 000548500(BM) image!], syn. nov.

“ Vallesia fluminensis ” Miers , mss. in sched.

“ Wheeleria alternifolia ” Sol. , mss. in sched.

Notes —Among the five gatherings mentioned in the protologue of A. pyricollum by Müller-Argoviensis (1860a), Woodson (1951) cited Weddell 445 as the type. However, since this gathering has more than one specimen, it was necessary to narrow Woodson’s (1951) typification by electing the best-preserved specimen as the second-step lectotype of A. pyricollum (P barcode P00639569) (ICN article 9.17; Turland et al. 2018). Also, Woodson (1951) cited the gathering “Sellow s.n.” as the type of A. pyricollum var. obovatum , but Müller-Argoviensis (1860a) only indicated the collections Riedel 35 and Riedel 587 in its protologue. Therefore, we selected a specimen with flower remains from Riedel 587 as the lectotype of A. pyricollum var. obovatum (M barcode M-0183490) (ICN article 9.3; Turland et al. 2018).

Finally, Barbosa et al. (2019) excluded Geissospermum solandri from the genus and transferred it to Aspidosperma . However, after analyzing the types of G. solandri , we observed that only one corresponded to Aspidosperma (i.e., A. pyricollum ) (BM barcode 000548498), since it presents broad obovate leaves with eucamptodromous venation, flowers externally pubescent with lobes shorter than the tube (ca. 4×), and entirely tomentose ovary. Since the remaining specimens belong to Peschiera solandri Miers (BM barcodes 000548499 and 000548500), we are excluding them from the collection of G. solandri .

Woodson (1951) considered A. sellowii Müll.Arg. as a synonym of A. pyricollum , but we could not make any decision about this synonymization due to insufficient information. Therefore, we treated A. sellowii as “ incertae sedis ” (as well as “ A. sellowii var. genuinum ”).