Urtica atrovirens
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Urtica atrovirens in flower |
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Urtica atrovirens is a species of plant in the nettle family(Urticaceae).
description
Urtica atrovirens grows as a perennial herbaceous plant and reaches heights of 30 to 80 centimeters. A rhizome is formed as a permanent organ. The constantly against arranged on the stem leaves are divided into petiole and leaf blade. The petiole is 1 to 8 cm long. The simple leaf blade has a diameter of 2 to 7 cm and is egg-shaped to rounded, rarely lanceolate with a heart-shaped blade base. The leaf margin is serrated. The leaf blade is lined with stinging hairs about 2.5 to 3 mm long . The two free stipules are lanceolate.
Urtica atrovirens is monoecious ( monoecious ). The racemose inflorescences arise in pairs in the leaf axils and, with lengths of 1 to 6 cm, are usually longer than the petiole. The unisexual flowers are small, greenish and radial symmetry . The male flowers contain four stamens . The female flowers contain an upper ovary . The ellipsoidal achenes are average in size with a length of 1 mm and a width of 0.8 mm.
The number of chromosomes is 2n = 24 or 26.
Occurrence
Urtica atrovirens occurs in the western Mediterranean region. Their distribution area extends from the Balearic Islands ( Menorca ), Sardinia and Corsica over the Tuscan Archipelago to Italy ( Tuscany ).
Urtica atrovirens occurs at altitudes from 0 to 1200 meters. It often colonizes the edges of bodies of water that dry out temporarily ( temporary bodies of water ). It grows on nitrogen-rich soils . It can be found on damp meadows or pastures, as well as on dung heaps or cattle dung .
Systematics
The closely related Mallorca nettle ( Urtica bianorii (Bone) Paiva ), sometimes also called Urtica atrovirens subsp. bianorii (Knoche) Font Quer & Garcias Font is assigned to Urtica atrovirens , is treated as a separate species in most authoritative publications.
swell
- P. Fraga, JA Rosselló, L. Sáez: Urtica atrovirens subsp. atrovirens. In: Á. Bañares, G. Blanca, J. Güemes, JC Moreno, S. Ortiz (eds.): Atlas y Libro Rojo de la Flora Vascular Amenazada de España: Taxones Prioritarios. Ed. Organismo Autónomo de Parques Nacionales, Ministerio de Medio Ambiente, Madrid 2004, ISBN 84-8014-521-8 , pp. 556-557 (PDF file; 197 kB).
- Luigi Riganese: data sheet from Schede di botanica (ital.).
Individual evidence
- ^ Urtica atrovirens at Tropicos.org. In: IPCN Chromosome Reports . Missouri Botanical Garden, St. Louis
- ^ Sandro Pignatti (ed.): Flora d'Italia . Vol. 1. Edagricole, Bologna 2003, ISBN 88-506-2449-2 , pp. 125 (third unaltered reprint of the 1st edition from 1982).
- ^ Pertti Uotila: Urticaceae. Urtica bianorii In: Euro + Med Plantbase - the information resource for Euro-Mediterranean plant diversity. Berlin 2011
- ↑ J. Paiva: Urtica. In: Santiago Castroviejo, Carlos Aedo, Santos Cirujano, Manuel Laínz, Pedro Montserrat, Ramón Morales, Félix Muñoz Garmendia, Carmen Navarro, Jorge Paiva, Carlos Soriano (eds.): Flora Ibérica. Plantas vasculares de la Península Ibérica e Islas Baleares, Vol. III. Plumbaginaceae (partim) - Capparaceae . Real Jardín Botánico, CSIC, Madrid 1993, ISBN 84-00-07375-4 , p. 264-266 ( PDF file ).
- ↑ Maximilian Weigend: Urtica dioica subsp. cypria, with a re-evaluation of the U. dioica group (Urticaceae) in western Asia. In: Willdenowia. Volume 36, No. 2, pp. 811-822, DOI: 10.3372 / wi.36.36212 .
