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Scientific Name– Alnus cordata Loisel. Synonim– Alnus cordifolia Common name(s)– alder of Corsica, Hartbladige Els, Italian alder, Ontano napoletano, Herzblattrige Erle. Distribution and Habitat– native to Corsica and South Italy; occurs naturally on damp soils, in poorly drained areas and depressed sites. Description– deciduuous tree, 10-15 (30) m tall; crown ovoid-conic. Bark greenish grey with numerous lenticels when young, later becoming a light grey-brown with small fissures. Twig slender, olive green, lenticels. Buds are stalked, green turning red an 0.6 cm long. Leaves alternate, simple, broadly oval to rounded, 5-10 cm long, base cordate, margin unevenly toothed, glossy green above, paler with a few scattered brown hairs below in vein axils and along midrib, petioles 2-3 cm long. Flowers monoecious, males flowers yellow-green, in aments elongated, 5-13 cm long, in clusters 3-5 (2); females flowers 6 mm, reddish green turning into a small cone, strobil 2.5-3 cm long, persistent in winter. Flowering in February-March. Fruit woody, 2 - 2.5 cm long, green turning reddish brown when ripe. Winged seeds. Growth rate– fast growth. Tolerances– it tolerates wet soil, but needs ample water. Requirements– does well in dry, acid, neutral and alkaline soil. Management– Propagation– seeds are best sown in a cold frame as soon as it is ripe and only just covered. When large enough to handle, seedlings should be pricked out into individual pots. Plant them out into their permanent positions in the summer.
Cuttings of mature wood, should be taken as soon as the leaves fall in autumn, and be planted outdoors in sandy soil. Pest and Diseases– is susceptible to chlorosis in very alkaline soils. Cultivars– 'Sipkes' 20 m tall, dark and glossy green leaves, recommended habit for a street tree. Properties and Uses– the tree is grown as an ornamental in gardens and parks and as a road-side. Is a windbreak or hedge for maritime areas. Alder trees has a symbiotic relationship and fix atmospheric nitrogen, utilized by the growing plants and enables it to grow well in quite poor soils. Curiosity– Bibliography Andreas Roloff, Andreas Bartels - Flora der Geholze - Ulmer, 2008 Cecil C. Konijnendijk, kjell Nilsson, Thomas B. Randrup, Jasper Schipperijn - Urban Forest and Trees - Springer, 2005 Katharina Pawlowski, William E. Newton - Nitrogen-fixing Actinorhizal Symbioses - Springer, 1ed, 2007 Michael A. Dirr - Dirr's Hardy Trees and Shrubs - Timber Press, 2ed, 1997
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See also
 Trees and shrubs
Clerodendrum bungei
Clerodendrum bungei - ornamental species grown in parks and gardens and in pots but terraces. Leaves crushed leaves an unpleasant odor. In hot and humid climates become invasive. Campsis radicans
Genus was created by Portuguese botanist João de Loureiro (1717-1791) in the 1790 Flora Cochinchinensis for Campsis grandiflora. Linne named species with TECOM radicans and Thunberg gave the name of Bignonia radicans. Prunus armeniaca - apricot
Prunus armeniaca - shrub or small tree, native of northeastern China, knew and cultivated worldwide for its edible fruit. The seeds of Prunus armeniaca extract oil used in perfume industry, cosmetics and pharmacy. Prunus serotina
Prunus serotina - a native of North America, grows on the edge of forests on sandy soils and poor. Acca sellowiana
Acca sellowiana is a slow-growing, evergreen shrub, a native of South America, is now widely grown in the tropics and warm climates as an ornamental, and for its fruit. In late spring it produces quantities of flowers with proeminent red stamens and pinky-white edible petals. After flowering, the foliage can be hard pruned into any shape. Magnoliopsida
Polemonium caeruleum
Polemonium caeruleum - species used as ornamental plants in gardens with spontaneous or rock gardens. Are planted at 30 cm distance between plants. Coffea charrieriana Stoff & F. Anthony sp.nov.
Shrub, 1-1.5 m high. Stalk 1-2 mm in diameter, pubescent. Stipele triangulation to the Delta, about 2 mm long, nested, pubescent. Petiole 2 mm long. Lamina elliptical to narrow elliptical, 5-7 x 2,2-3,5 cm, thin Clerodendrum bungei
Clerodendrum bungei - ornamental species grown in parks and gardens and in pots but terraces. Leaves crushed leaves an unpleasant odor. In hot and humid climates become invasive. Linum viscosum
Linum viscosum - increases in floor and alpine mountain in southern Europe, from Iberia to the Balkans, the arid grasslands and bushes, the limestone bedrock, from plain to 1600 m altitude. Akebia quinata
Liana Wood, single, semi-evergreen, perennial. Strain gray-brown with prominent lenticele. Leaves alternate, palmately-compound, 5 folio ribbed stipelate. Oblonga call to Foliolele ovat-elliptic, the round, ribbed 4.5 to 10 cm long. Raceme axillary blossom, clocks, male flowers are arranged terminal |
 
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