The genusNoisettia was first described by Kunth in 1821,[6] with two species Noisetia frangulaefolia and N. orinocensis, placing it in the family Violeae, with five other genera.[7] de Candolle included Noisettia in his Violarieae in 1824, with three species[8] and at the same time Martius was describing N. pyrifolia,[9] although this species was later transferred to the related genus, Anchietea.[10] In 1846, Lindley classified it in Violaceae, within the Violales,[11] although Bentham and Hooker (1862) called the family Violarieae.[12]
Historically Noisettia was placed within Violaceae in subfamily Violoideae, tribe Violeae, subtribe Violinae, together with Anchietea, Calyptrion, Schweiggeria and Viola, following Lindley's description of Tribe Violeae.[11][3] But these divisions have been shown to be artificial and not monophyletic. Molecular phylogenetic studies show that Violaceae is best considered as four clades rather than taxonomic ranks. Noisettia occurs in Clade I of the family, consisting of Viola, Schweiggeria, Noisettia and Allexis, in which Schweiggeria and Noisettia are monotypic and form a sister group to Viola. Clade 1 represents a subset of the original Violinae, together with the West African Allexis, previously included in tribe Rinoreeae subtribe Rinoreinae.[5][13][14]
of which N. longifolia is considered a synonym of N. orchidiflora,[16] and only the latter is accepted by Plants of the World Online,[2] while N. acuminata is classified as "ambiguous" (unable to reliably identify taxon).[1] Most authors consider Noisettia to be monotypic for N. orchidiflora.[3][5][4][17]N. orchidiflora has a large number of other synonyms.[2]
Species
Noisettia orchidoflora was first described by Rudge in 1805. Rudge believing it to be a species of Viola, gave it the name of Viola orchidoflora, observing that the enlarged lower petal resembled that of an orchid.[18] With the separation of Noisettia from Viola by Kunth in 1821, Gingins (1823) considered Kunth's original N. frangulaefolia, as N. longifolia.
Distribution and habitat
Humid coastal forests of Northern and eastern South America, including North, Northeast, South and Southeast Brazil, French Guiana, Peru, and Suriname.[5][3] (see Map, at Plants of The World Online).[2]
