Symphytum asperum
Rough Comfrey ( Symphytum asperum )
The Rough Comfrey ( Symphytum asperum ) or Caucasian Comfrey is a plant belonging to the family of Boraginaceae ( Boraginaceae ). The original distribution area is located in the Caucasus region.
- 4.1 Literature
- 4.2 Notes and references
Description
Appearance and foliage leaf
The Rough Comfrey is a perennial herbaceous plant with plant height up to 180 cm. The branched stems have scattered prickly plant hair. The " rhizome " grows erect.
The alternate on the stem arranged leaves are usually stalked and the upper sitting. You are not decurrent and not amplexicaul. The simple leaf blades are ovate to oblong with rounded or slightly heart-shaped cuneiform to Spreitengrund and entire. They are densely hairy bristly and prickly at least next to the midrib. Stipules are absent.
Inflorescence, flower and fruit
Few flowers form a terminal inflorescence in the form of a double roll. Bracts are not formed.
The hermaphrodite flowers are radial symmetry and fünfzählig double perianth. The five sepals are fused on a quarter to a third of their total length of 3 to 5 millimeters. The calyx teeth are rounded. The five petals are fused into a bell-shaped crown, which is colored blue, pink young and in further consequence. In the corolla tube are five tongue-shaped, slightly broadened at the base Kronschuppen with the edge dense, narrow cylindrical- conical shaped glands. It's just a circle with five stamens present. The little narrower stamens are about the same as the dust bag and the connective is not also growing over the counters.
Are formed Klaus fruits that fall into four reticulate rugose and finely warty part fruit.
Dissemination and use
Originally the Rough Comfrey is common in the northeastern Turkey, northern Iran and the Caucasus states of Armenia, Azerbaijan, Georgia and the Russian republic of Dagestan. Today, the Rough Comfrey is naturalized throughout Europe, except in the southern Mediterranean regions.
In Austria he may still grown as a forage crop and is rarely to be found locally in Salzburg and perhaps in Carinthia.
System
The first description of Symphytum asperum in 1805 by Ivan Ivanovich Lepjochin Acta Academiae Scientiarum Imperialis in Nova Petropolitanae, Volume 14, page 442, Table 7 synonyms for Symphytum asperum Lepech. are Symphytum asperrimum Sims, Symphytum armeniacum Buckn. and Symphytum asperum var armeniacum ( Buckn. ) Kurtto.
The Rough Comfrey is common with the Real comfrey ( Symphytum officinale) parent of the following hybrids:
- Feed comfrey ( Symphytum × uplandicum Nyman )
- Symphytum × norvicense Leaney & C.L.O 'Reilly