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
Wisteria sinensis - Chinese wisteria
Wisteria sinensis - is considered invasive in some places around the globe. In most cases become established in places where it is cultivated ornamental.
Where there is danger of becoming glycineinvasive is better to be replaced with Aristolochia macrophylla, Bignonoa capreolata, Campsis radicand, Lonicera sempervirens, Wisteria frutescens.
Carica papaya - originally from Costa Rica, USA, tropical to temperate areas, up to 1500 m altitude.
The fruit contains protein, carbohydrates, potassium, phosphorus, vitamin A, vitamin C.
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.
Small tree, stem 6 m tall, thin. Lujerii are pubescent. Leaves with Lamine obovata, 9-19 x 3.5-5.5 cm, short top acuminata, the acute subcoriacee, subglabra mid rib, ribs side 10-13 pairs, petiole 3.5-10 mm, slightly pubescent.
Calycanthus floridus L.
Shrub 1.8-4 m tall, multiple stems, erect, clocks the fruit. Buds small, round, naked, brown-pubescent. Scaorta smooth lenticele, by burning aromatic, dark gray-brown. Leaves opposite, decidue, simple ovata to elliptic, entire, aromatic if they are broken, shiny, dense tomentoase inside, spring green, autumn is yellow or yellow-versa.
Reseda phyteuma - annual or perennial grass, native to southern Europe and southwest Asia, North Africa, it grows on basic soils, grassy edges of roads, from 0 to 1900 m altitude.
Prunus cerasifera - corcodus
Prunus cerasifera - is grown for its edible fruit jams are made and cultivars and varieties are found all over the world species grown as ornamentals in parks and gardens, or green street.
Leaves in basal rosette, 5.12 x 1.5-3 mm, limb oblong-lanceolata, 1.3 mm peak cuspidata, dilated to the wing edges pinnate-lobate, 5 cm long stalks. Blossom wing, 20-40 cm, hispida, bracts 5-10 mm.