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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
Nageia fleuryi
Evergreen tree. Leaves opposite, coriacee, oblong to elliptic-lanceolata, 8-18 x 2-4.5 cm, top acuminata, petiole 2-4 mm long. Male cones are cylindrical, grouped 3-4 at underarms, female cones are solitary, the armpit leaves. Spartium junceum
Spartium junceum - native to the Canary Islands and Mediterranean Basin, grows in arid places, ground limestone, from plain to 600-2000 m, in association with Quercus pubescens, Quercus ilex, Fraxinus ornus, Cotinus coggygria. Camellia japonica
Evergreen ornamental plant of the Theaceae family, native from Eastern Asia, its origin is still controversial, being considered by some as species indigenous from Japonia and, by others, from China. It was introduced into Europe by the Portuguese in 1542 and soon spread to Spain, England, France and Italy; into United States at the beginning of the 18th century, and in Australia during the mid 19th century. Westringia rigida
Shrub 3 m high. Leaves disposed in each vertical 3 (4), the busiest peak, linear, 1.5 cm long, acuminata-mucronata, bright green top and white on the inside of the main rib prominent, margins Revol. Magnolia baillonii
Tree, 40 m high, truncated 1 m in diameter. Stalk, leaf stalks are brown and language violated. Petiole 1.5-3 cm long. Leaves elliptic, ovat-elliptic, 6-22 x 4.7 cm, protruding ribs on both surfaces, base cuneata, top acuminata. Magnoliopsida
Tussilago windbag - coltsfoot
From the Latin Tussilago tussis = cough on the plant's medicinal properties, windbag is the old name of poplar because of similarities between these species leaves. Windbag Tussilago Tussilago is the only species of the genus. Dioscorides, used potbal leaves as a substitute for tobacco, and to treat cough and asthma. Ageratum houstonianum - rods
Ageratum houstonianum is an ornamental species cultivated for borders, cut flowers or pots. In Europe it is cultivated as ornamental plants in the 1800. Eschscholzia californica - California poppy
Perennial species in the area of origin, in other regions is annual, reaching up to 5-60 cm high, glabra, glauca. Stem branched, decumbenta. Leaves basal and caulinare, green-glauca, sectors, lobes linear or obluongi, glabra. Floriferi buds are obconici pick. Flowers solitary, peduncle of 5-15 cm long, calyx acute or acuminata, glabru, glauca; Corola consisting of 4 petals yellow-orange, 5 cm long, numerous stamens. Mercurialis annua
Annual U.S. glabra slightly pubescent. Stem erect, branched, 10-50 cm high. Stipelate leaves, opposite, 1.5-5 cm, ovata lanceolata or elliptic, margin crenat-evening, petiole 0.2-1.5 cm. Dioecious, occasionally monoecious. Gigabracteata Begonia sp HZ Li & H. Ma. November. in Guangxi, China
Begonia gigabracteata is a plant decide. Tuberous rhizome, 2 cm in diameter. Stipele obsolete. Basal leaves, stalks 4 to 9.2 cm long, cylindrical, reddish or green, with few glandular hairs; language obovata, glabru basis cordata, acuminata top, margin entire or irregular gear, nervatiune palmate-pinnate. |
 
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