Helietta glaziovii (Engl.) Pirani. Esenbeckia glaziovii Engl., 1998

Londoño-Echeverri, Yeison, Trujillo-López, Ana María, Pirani, José Rubens & Pérez-Zabala, Jorge Andrés, 2023, A new species of Helietta (Pilocarpinae, Zanthoxyloideae, Rutaceae) from Colombia and notes on the morphology and circumscription of H. glaziovii, Phytotaxa 625 (1), pp. 98-107 : 103-104

Helietta glaziovii (Engl.) Pirani. Esenbeckia glaziovii Engl.

Type:— BRAZIL. Rio de Janeiro: Alto Macahé [Macaé], 2 June 1891 (fl), A. Glaziou 18171 (Lectotype designated by Pirani 1998: P-2440994 [digital image!]; Isolectotypes: C-10018445 [digital image!], C-10018446 [digital image!], F-936483 [digital image!], K-531280 [digital image!], LE-2719 [digital image!], P-6679885 [digital image!], P-6679886 [digital image!]; photos of destroyed B holotype at F, MO, NY, SPF).

The morphological limits of Helietta glaziovii were reviewed during this study. Two additional features not previously recorded by Pirani (1998) were detected in the type specimens: Its leaflets with margin involute laterally at the very apex and its petals being glabrous, not ciliolate. The current circumscription of H. glaziovii by Pirani (1998) and Pirani & Groppo (2023) is based on several additional specimens from the Espinhaço Range and other areas in the states of Bahia, Minas Gerais and Goiás, in Central and eastern Brazil. However, none of these specimens exhibit leaflets with margin involute at apex and a few of them have petals that are glabrous. These features are taxonomically important for the species circumscription within the genus and could suggest the possibility of recognition of two taxa. However, this is prevented by the absence of additional specimens exhibiting the morphological combination present in the type of H. glaziovii , as well as by the doubt about the precise type locality, since the annotation by Glaziou on the labels are undoubtless inaccurate (see Pirani 1998: 369–371). It is very unlikely that the type specimen could have been collected around Macaé in Rio de Janeiro state, a region included within the moist Atlantic Forest Dominium. Previous analyses of specimens of other families collected by Glaziou also lead to the conclusion that he probably provided erroneous data about the locality of some collections (cf. Rudd 1965: 367, Wurdack 1970, Kaastra 1982: 115, Pirani 1998: 369–371).