The genus Bipinnula (Orchidaceae: Chloraeinae) in Argentina

Abstract

A taxonomic synopsis of Bipinnula Comm. ex Juss. (Orchidaceae: Chloraeinae) in Argentina is presented. Three species are recognized: B. biplumata Rchb.f., B. penicillata (Rchb.f.) Cisternas & Salazar and B. polysyka Kraenzl. A key to separate these species is presented and their distribution in Argentina is presented. All species are described in detail and photographs of diagnostic vegetative and floral features, as well as distributional, ecological and nomenclatural comments are included. Lectotypes for the basionyms Arethusa biplumata L.f., Chloraea arechavaletae Kraenzl. and B. polysyka Kraenzl. are designated. All studied species are terrestrial orchids that grow in grasslands of the heavily transformed Pampas biome; two of them are restricted to a few counties. Therefore, an assessment on their conservation status is urgently needed.

Cambios en La Distribución Geográfica De Algunas Especies Americanas en La Provincia De Buenos Aires

“…En el Máximo Térmico del Holoceno (7500-4500 años AP), elementos faunísticos subtropicales llegaron hasta Azul (Tonni, 2017), por lo que podría suponerse que era mayor el número de especies de la fl ora subtropical en el centro de la provincia de Buenos Aires. Por ejemplo, en la región existen poblaciones relictuales de especies como la orquídea Bipinnula biplumata, que en la provincia de Buenos Aires sólo se distribuye en las sierras de Azul y Olavarría (Sanguinetti et al, 2015).…”

Habenaria parviflora (Orchidaceae), extension of its austral distributional limit and new synonymy

“…It is possible that with further prospecting efforts some other close occurrences will be found. However, the Tandilia System, as a whole, is very well‐explored from a floristic point of view (Sanguinetti et al ), thus it seems quite unlikely that this species might be found further southeast within this system.…”

Newly discovered orchid types (Orchidaceae) in the Herbarium Gottingense with selected lectotypifications

“…(Kränzlin 1887;Orchidaceae) in Zurich (Z & ZT) by Steudel et al (2012). This material has been designated as lectotype of the species as it represents the only known original material (Sanguinetti et al 2015). Additionally, a complete revision of a group can clarify nomenclatural confusion (Steudel 2012).…”