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
Ribes uva-crispa - agris, grapes bear
Thorny shrub, 1 m high. Gray-brown bark is exfoliating. Rich stem branched divaricata. Branches long, thin, gray-brown with yellow top, pubescent glabrata in youth and adulthood. Leaves simple, cordiforme, 3-5 lobed, toothed, long stalks
Sophora derived from Arabic and means tree with pea flowers. Specific epithet is in honor davidii Abbe Armand David, a French missionary and naturalist who contributed to the knowledge of flora and fauna of China.
Sophora davidii is from Hubei, China, where it grows on rocky places at elevations of 1 000 - 3 500 m.
Carpinus betulus - hard wood shaft with durable but less humid conditions. Suprta trimming and better suited for bonsai training.
Prunus laurocerasus L.
Shrub or small tree, 6 m high. Leaves evergreen, alternate, coriacee, lamina lanceolata-obovata, top acute, base cuneata, upper surface glossy green, the bottom is opaque, ribbed clear, ribbed robust short.
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.
Teline canariensis - shrub native (endemic) of Tenerife and Gran Canaria, grows at the edge of forests of Pinus radiata and Laurus canariensis novo in association with Neotinea maculata, Hypericum reflexum and Cystus sympithifolius, from 500 to 1500 m altitude.
Thevetia peruviana - leandru yellow
Evergreen shrub, 6 m high. Stem erect, cylindrical, branched, smooth, green, presents latex. Leaves simple subsesile, alternate, arranged spiral limb linear, entire edge, top acute, glabra, 8-16 cm long.
Tree 25 m high. Trunk erect, branched. Ritidom smooth, dark gray. Crown broad, thick, tapered. Leaves persistent, alternate, coriacee, lamina ovat-oblong, acute, entire and slightly wavy edge on the upper side and glossy green color, on the underside is brown-rust, pubescent, ribbed central rib obvious; nervatiuni pinnate secondary.