Polygonum nepalense Meisn. avventizia nel Bellunese |
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Authors: | Erika Pignatti Wikus |
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Institution: | Istituto ed Orto Botanico dell'Università , Trieste |
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Abstract: | Abstract Polygonum nepalense Meisn. has been found naturalteed together with Collomia linearis Nutt. near Belluno, Northern Italy. Polygonum nepalense belongs to the Cephalophilon-Section, an annual with creeping-ascending branched stems, winged petioles and 2 rounded, basal auricles, leaf-blade ovate-triangular, somehow fleshy, ochreas tubular with a tuft of hairs at the base, peduncles glandular-pubescent; spikes globose, densely flowered, styles 2 (seldom 3), nutlets trigonous, dark-brown, about 1-1.5 mm long. This species has not been indicated yet in the Alps but is cited as a rather common one in humid localities, damp woods in mountains, tea- and chinchona-plantations in Asia and India. Abundant on the Himalaya up to 10,000 ft., known also in Bengal, Ceylon, Assam, Burma, China, Java, Formosa, Japan and Abyssinia. |
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