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Taxonomy, distribution and new taxa from the Habenaria crucifera (section Nudae, Orchidaceae) aggregate from Brazil and the Guianas

2010; Springer Science+Business Media; Volume: 62; Issue: 1 Linguagem: Inglês

10.1007/s12228-009-9099-3

1938-436X

João A. N. Batista, Luciano de Bem Bianchetti,

Fern and Epiphyte Biology

The taxonomy, morphology, and geographic distributions of Habenaria crucifera and related species in section Nudae were investigated. Habenaria galeandriformis and H. montiswilhelminae are included in the affinity of H. crucifera and four new taxa are described: H. cardiostigmatica, H. crucifera var. brevidactyla, H. guaraensis, and H. spanophytica. These species form a subgroup within section Nudae, characterized by linear grass-like leaves that are appressed to the stem; green flowers; simple or discretely bipartite petals; a tripartite lip; a rostellum midlobe completely placed between the two anther loci; stigma lobes that are closely parallel; and a separated hemipollinarium. This group of species ranges from the Guianas to the state of Rio Grande do Sul in southern Brazil, but is concentrated in the cerrado of central Brazil. Diagnostic characters, illustrations, descriptions and notes on the habitat, distribution, phenology, and conservation status are presented for all species here recognized.