Pachira macrocalyx (Ducke) Fern. Alonso, Anales Jard. Bot. Madrid 56: 310. 1998.

Carvalho-Sobrinho, Jefferson, Yoshikawa, Vania Nobuko & Dorr, Laurence J., 2021, Notes on Brazilian Pachira (Malvaceae, Bombacoideae) II: Additional typifications and new synonymies, PhytoKeys 186, pp. 53-72 : 53

Pachira macrocalyx (Ducke) Fern. Alonso, Anales Jard. Bot. Madrid 56: 310. 1998.

Bombax macrocalyx Ducke, Arch. Jard. Bot. Rio de Janeiro 4: 124. 1925. Bombacopsis macrocalyx (Ducke) A. Robyns, Bull. Jard. Bot. État 33: 203. 1963.

Pachira dolichocalyx A. Robyns, Bull. Jard. Bot. Belg. 58: 535, fig. 1988, syn. nov. Type: French Guiana. Piste de St. Elie, km 16, à proximité de nos carbets bota [Sinnamary], 28 May 1980 (fl, fr), M.F. Prévost 840 (holotype: CAY [now P barcode 0007210]; isotypes: P barcode 00077211, P barcode 05273658, U barcode 0000784, U barcode 0000785).

Type.

Brazil. Pará, Rio Xingú, margem do Rio Tucuruhy (curso superior), 24 Aug 1919 (lf, fl), A. Ducke s.n. [RB 11417] (holotype: RB barcode 00534493; isotypes: B† [= F neg. no. 9536], S-PLE-E4252 n.v., S-PLE-E4253 n.v., S-R-11282, U barcode 0000771) .

Note.

When Robyns (1988) described Pachira dolichocalyx he compared it to P. aquatica and P. insignis , which according to his concept of the Bombacoideae were the only two species that comprised Pachira . We assume he failed to compare the material to Bombacopsis macrocalyx because he considered Bombacopsis to be a different genus.

In the protologue of Pachira dolichocalyx , the petals are described as greenish outside and reddish-purple inside " in vivo." This information could only have come from whatever may have been inferred from examining the pressed and dried material and information on the type label, which simply states that the petals are wine red ("rouges lie de vin"). Robyns (1963, p. 204) described the petals of P. macrocalyx (as Bombacopsis macrocalyx ) as pale yellow outside and whitish-puberulent inside. Yet many specimen labels of P. macrocalyx report red petals. Additionally, staminal-tube length, fruit and seed morphology (mainly dimensions), and habitat are similar for both species supporting our decision to consider them synonymous.