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San Miguel de Tucumán, Argentina

Garralla S.,Northeast National University | Bulacio E.,Laboratorio Of Taxonomia Fanerogamica
Darwiniana | Year: 2011

We analyzed pollen morphology of Tropaeolum argentinum, T. atrocapillare, T. capillare, T. incisum, T. meyeri, T. patagonicum, T. pentaphyllum, T. polyphyllum, T. porifolium, T. trialata, T. tuberosum subsp. silvestre, T. warmingianum subesp. warmingianum and T. willinkii to provide supplementary data for the delimitation of these species. Observations, counting and measuring of pollen grains were carried out under optical and scanning electron microscopes. This study points out that Tropaeolum is a stenopalynous genus. Grains are isopolar or isopolar bilateral, radiosymmetric or bisymmetric, small to medium-sized, triangular to subcircular, anguloaperturate, dicolporate, tricolporate or tetracolporate. The exine is tectate, perforate with reticulum supratectate, heterobrochate, angustimurate. Differences among the taxa are discussed, and a palynological key for the Argentinean species of Tropaeolum is presented.

Bulacio E.,Laboratorio Of Taxonomia Fanerogamica
Novon | Year: 2013

Two new South American species of Tropaeolum L. (Tropaeolaceae), T. slanisii Bulacio from Salta, Argentina, and T. kieslingii Bulacio from Tarija, Bolivia, found during a revision of the genus for the Flora of Argentina, are described, illustrated, and compared with related species. Both new species belong to Tropaeolum sect. Tropaeolum, which is characterized by the strongly heteromorphic petals, usually ciliate on the margins, and the entire or more or less deeply incised leaf blades.

Tropaeolum tuberosum Ruiz et Pav. ssp. silvestre Sparre is a rhizomatous climbing herb that in Argentina was found in the Sierras of Calilegua (Jujuy) and Catamarca mountains, yet of this last locality only is known an one and incomplete specimen. It inhabits humid gorges, between 2100-2650 masl, in the upper limit of the montane forest. The slender stem reaches 3 meters in lenght and the underground portion shows elongated rhizomes up to 1 cm in diameter. These are the main differences with the ssp. tuberosum, in which the stem is shorter, erect and develop well-defined tubers.

Bulacio E.,Laboratorio Of Taxonomia Fanerogamica | Ayarde H.,Institute Ecologia
Boletin de la Sociedad Argentina de Botanica | Year: 2014

On the presence of Tillandsia schreiteri and T. sphaerocephala (Bromeliaceae) in Argentina. Tillandsia sphaerocephala var. tarijensis is mentioned for Argentina for the first time. Diagnostic characters to clearly differentiate it from the typical variety and from T. schreiteri, entities considered as synonyms for the argentinean flora, are presented. A detailed description of the new entity, a key, drawings and photographic images are included.

In this paper, Berberis calilehua, which inhabits the humid mountains, above 3,000 m asl, is described. This species has morphological similarities with Andean species of Peru and Bolivia but differs from those by combination of characters such as solitary flowers, fruit with conspicuous style, leaf margin toothed spinose, open dichotome venation. A detailed description of the proposed entity, a key differentiating related species, illustrations and photographs are included.

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