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.
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.
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
Trees and shrubs
Ilex perado - small tree, port pyramidal, evergreen. Originally from the Canary Islands, dense forests grow in the Aqua Garcia, in association with Apollonias barbujana, Arbutus canariensis, Laurus Azores, Myrsine canariensis, Ocotal foetens, Persea indica, Prunus Lusitania subsp. hixa, Visna mocanera.
Dasiphora fruticosa - deciduu shrub, native of Asia, grows on wet soils and wet rocks.
Prunus serotina - a native of North America, grows on the edge of forests on sandy soils and poor.
Punica granatum - pomegranate
Erinus alpinus L.
Herbaceous perennial, evergreen. Stem branched, forming bush, 5-15 cm high. Leaves spatulate, 4 cm long, needle tapered. Flowers purple, 1.25 cm diameter, arranged in raceme of 6 cm long. Seeds ellipsoidal, 0.6-0.8 x 0.35-0.45 mm supreafata glossy, dark brown.
Stachys officinalis - a species native to Europe and the Caucasus, grass grows on soils, pastures arid and mountainous deciduous paduride collinear, from 0 to 1800 m altitude.
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.
Angophora hispida Blaxell
Shrub or small tree, 4-5 m high. Gray-red bark at first smooth, exfoliating in due course. Leaves opposite, Sesia or short stalks, cordiform, 5-10 x 2.5-4.5 cm, pale green, pubescent. 3.7 flowers in a corymb, 10-15 cm diameter. Sepa free (dialisepal), green, petals free (dialipetal), white cream. Blooming in January. Fruit capsule.
Herbaceous plants, roots rizomatoase, 2-4 mm in diameter. Stem erect, tube or fistiloase, foam, and longitudinally striated. Leaves basal, long petiolate (5-20 cm); language cordata, margine crenata, wavy carnoas, top obtuse, bright green. Caulinare Leaves are similar to those that are based only smaller sessile or subsesile.