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Rock Whitebeam
''Aria rupicola'', commonly known as rock whitebeam, is a rare species of shrub or small tree best known from the British Isles but also reported from Norway, Sweden and Russia. Reaching heights of 10 m,''New Flora of the British Isles''; Clive Stace; Third edition; 2011 printing it grows in rocky woodland, scrub and cliffs, usually on limestone. The species reproduces Apomixis, apomictically (asexually via cloned seeds) and was presumably created by Polyploidy, autopolyploidysation of the common whitebeam proper (''Sorbus aria s.str.''). It contains a tetraploidal set of chromosomes (2n=4x=68). Stace gives ''Aria rupicola'' the following characteristics: * Leaves unlobed or lobed ≤1/20 of the way to the midrib. * Leaves with a single style of teeth or, weakly, two styles of teeth. * Leaves with 6 to 9 (rarely 4 to 10) pairs of lateral veins. * Leaves mostly 1.6 to 2.4 times longer than wide. * Leaves mostly widest in that half of the leaf furthest from the stalk. * Leaves usu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trondheimsfjord
The Trondheim Fjord or Trondheimsfjorden (), an inlet of the Norwegian Sea, is Norway's third-longest fjord at long. It is located in the west-central part of the country in Trøndelag county, and it stretches from the municipality of Ørland in the west to the municipality of Steinkjer in the north, passing the city of Trondheim on its way. Its maximum depth is , between Orkland and Indre Fosen. The largest islands in the fjord are Ytterøya and Tautra; the small island of Munkholmen is located near the harbor of Trondheim; and there are several islands at the entrance of the fjord. The narrow ''Skarnsundet'' is crossed by the Skarnsund Bridge. The part of the fjord to the north of the strait is referred to as the ''Beitstadfjorden''. The main part of the Trondheimsfjord is ice-free all year; only Verrasundet, a long and narrow fjord branch in the northern part of the fjord, might be ice covered in winter. The Beitstadfjorden might also freeze over in winter, but only for a few ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |