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White Flowers in South America: A New Species of Antiphytum (Echiochiloideae, Boraginaceae)

2020; American Society of Plant Taxonomists; Volume: 45; Issue: 4 Linguagem: Inglês

10.1600/036364420x16033963649291

1548-2324

Nidia Mendoza-Díaz, Marina Díaz, Patricia Brussa, Fabián Muñoz, José Maurício Bonifacino, Hilda Flores‐Olvera,

Plant and animal studies

Abstract— Antiphytum charruasorum , a new endemic species from western Uruguay, is described. This is the only South American species in the genus with white corolla and an infra-medial cicatrix on the ventral face of the eremocarp, both features shared with the North American species of Antiphytum , in sharp contrast with the blue corolla and the basal cicatrix at the end of a stipe-like prolongation that characterizes all South American species in the genus. Antiphytum charruasorum increases the diversity of the genus in South America, as well as the endemism and distribution range into Uruguay. Moreover, this new species adds novel features in Antiphytum such as the irregularly dichasial inflorescences, the hirsute faucal appendages, the eremocarps with a tissue plug from the gynobase, and the habitat where the species has been reported.