Tabebuia is a genus offlowering plants in the familyBignoniaceae.・・・・（中略）・・・・
In 1992, a revision of Tabebuia described 99 species and one hybrid. Phylogenetic studies of DNA sequences later showed that Tabebuia, as then circumscribed, was polyphyletic. In 2007, it was divided into three separate genera. Primavera (Roseodendron donnell-smithii) and a related species with no unique common name (Roseodendron chryseum) were transferred to Roseodendron. Those species known as ipê, pau d'arco, or poui were transferred to Handroanthus. Sixty-seven species remained in Tabebuia. The former genus and polyphyletic group of 99 species described by Gentry in 1992 is now usually referred to as "Tabebuia sensu lato".
The generic name is derived from words used for these trees by the Indigenous peoples in Brazil.
Handroanthus is a genus of flowering plants in the family Bignoniaceae. It consists of 30 species of trees, known in Latin America by the common names poui, pau d'arco, or ipê. The latter sometimes appears as epay in English. The large timber species are sometimes called lapacho or guayacan, but these names are more properly applied to the species Handroanthus lapacho and Handroanthus guayacan, respectively.
The name Tabebuia entered the botanical literature in 1803, when António Bernardino Gomes used it as a common name for Tabebuia uliginosa, now a synonym for Tabebuia cassinoides, which he described as a species of Bignonia. Tabebuia is an abbreviation of "tacyba bebuya", a Tupi name meaning "ant wood". Among the Indigenous peoples in Brazil, similar names exist for various species of Tabebuia.
サンパウロ市在住の松村滋樹さんから、「Cidades brasileiras cujos nomes têm origem no tupi-guarani e outros nomes」という資料を紹介して頂きました。先住民のトゥピ・ガラニー族の言語に由来するブラジルの都市名の解説書です。これに、サンパウロ州の「IPEÚNA市（人口現在6千人）」があります。 IPEÚNA (SP) y’pê: madeira de casca dura - ipê + una: escuro, preto. Ipê-roxo = y’pi’una: madeira de casca preta. IPEÚNAとは、黒いイペー、すなわち紫イペー、イペー・ロッショという意味です。 出典は下記です。 http://www.paty.posto7.com.br/palavrastupiguarani.htm