Hippeastrum subg. Tocantinia is a subgenus of the genus Hippeastrum endemic to Brazil.
Description Vegetative characteristics Hippeastrum subg. Tocantinia are bulbous, 30–70 cm tall perennial herbs with globose bulbs bearing 3–8 annual leaves.García, N., Meerow, A. W., Arroyo‐Leuenberger, S., Oliveira, R. S., Dutilh, J. H., Soltis, P. S., & Judd, W. S. (2019). Generic classification of Amaryllidaceae tribe Hippeastreae. Taxon, 68(3), 481-498. Generative characteristics The single-flowered inflorescence with a hollow or solid, 15–70 cm long, and 2–7 mm wide scape bears a fragrant, zygomorphic flower. Cytology The chromosome count is 2n = 22.
Taxonomy It was first published as Tocantinia by Ravenna in 2000 with Tocantinia mira as the type species.Tocantinia Ravenna. (n.d.). International Plant Names Index. Retrieved March 14, 2025, from https://www.ipni.org/n/330331-2 It was merged into the genus Hippeastrum as Hippeastrum subg. Tocantinia by Nicolás García Berguecio in 2019.Hippeastrum subgen. Tocantinia (Ravenna) Nic.García. (n.d.). International Plant Names Index. Retrieved March 14, 2025, from https://www.ipni.org/n/77203202-1 Species It has three species: Hippeastrum dutilhianum Hippeastrum mirum Hippeastrum stigmovittatum Etymology The subgeneric name Tocantinia refers to Tocantins, Brazil.Büneker, H. M., Bastian, R. E., Soares, K. P., & Costa, C. M. (2016). The genus Tocantinia (Amaryllidaceae, Amaryllidoideae) and two new species from Brazil. Balduinia, (53), 01-14.
Distribution and habitat It is endemic to Brazil, where it occurs in the states of Bahia, Minas Gerais, and Tocantins.
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