25
Mar
2009
Alnus incana (L.) Moench - white alder
Trees and shrubs | Magnoliopsida

Scientific name - Alnus incana (L.) Moench

Alnus derives from the Celtic 'the lan' = near rivers; incana specific name derives from the Latin 'canuto' = white on the underside of the leaves.

Synonyms - Betula Alnus, Betula incana.

Popular names - white alder, Aulnat blanc, Grauer, Weisser, ontano bianco, mountain alder.

Distribution and Habitat - originally from Northern and Central Europe, the Caucasus, East Asia and North America.

Description - mano tree or shrub that can reach 20 m, with stem often crooked, crown with branches thick, upward, lush foliage, lujerii in young gray, pubescent. Bark smooth, shiny, whitish gray, the old copies, to the base with shallow cracks. Wide elliptical leaves up to ovatBy 4.10 cm long, 4-6 cm wide, rounded to the double needle and lobe, pointed, gray green face, white inside gray, furry, ready alternative. Laminated ribs are straight, neramificate to head. Flowers unisexuate in Ament, is formed in the summer and before the leaf opens, the following spring. After fertilization, the female form conulete fruit (strobili) small, Sesia, many grouped 4-8, in one place. Fruits are small samara pentagonal small, narrow wings, red-brown. Seed wings are equipped with air bags that float on water to help release.

Growth rate - fast, powerful and drajoneaza few lastareste, with longevity a little under 100 years, on average 50-60 years.

Tolerances - air pollution, smoke, drought and shading. Resistant to frost.

Requirements - species rustic mountain adapted to harsh conditions, with the season you willgetatie short, supporting good frosts at high altitudes the increase. Placements prefer light and moist.

Is less demanding from the ground, so the soil rich vegetand well, loose, and the soil compacts,

cold, on the contrary the limestone or acidic soils in bogs, or poorly formed, cruel. Hang in excess water and to soil drought.

Propagation - Seed sown in autumn, winter and early spring snow or by grafting to

ornamental varieties, rootstock is A. glutinosa.

Diseases and pests - Phytoptus rudis.

Cultivars and varieties - 'Angustissima' narrow leaves and iregulat incision, 'Aurea' stalk sheet are yellow, 'Bolleana' iregulat stained yellow leaves,

Properties and Uses --forest species of interest, used as a pioneer plant, because its rusticitatii,

emphasizing and strengthening bank valleys flowing water, degraded land, slopes fast, ravenele mountain torrents and river. The strong fixed drajonarea land erosion in areas with slopes împiedecand emphasized.

The wood is processed well, polished rims, has an average resistance to air and water, between 10 and 40 years, întrebuintandu to the production of plywood and sheets of chips, pencils, boxes, packaging products, turning. Tanning substances in the bark are used in paint, bark and fruits having tinctorial properties.

Species may be used for public green spaces, enriching the soil in nitrogen because the roots nodozitatilor and fertilizandu him by litter.

Bark is used against rheumatism, the Americans used to treatbad anemia, and diaforeica for urinary problems.

References

C. Colston Burrell - Invasive Plants Native Alternatives - Brooklyn Botanic Garden, 2006

E. Hulten - Flora of Alaska and neighboring Territories - Stanford University Press

Gary Stacey, Robert H. Burris, Harold J. Evans - Biological Nitrogen Fixation - Springer, 1992

Stubbendieck James, Stephan L. Hatch, LM Landholt - North American Wildland Plants - University of Nebraska Press, 2004

MM Grandtner - Elsevier's Dictionary of Trees - Elsevier Science, 2005

M. Forrest - Landscape Trees and Shrubs - CABI Publishing, 2006

See also
Top
Trees and shrubs
Senna corymbosa

Evergreen shrub, 2-3 m high, stem thin, highly ramified, almost glabru. Leaves alternate, petiolate, membranous, paripenat compound, 2-3 pairs of folio; stipele linear, obsolete, or oblong-folio oblonga lanceolata, 5 x 1 cm, top acute or obtuse, base round and asymmetrical, the ventral green, glabra .

 
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.

 
Cocos nucifera

Palm mono, with one strain. Trunk erect, gray, 20 m high and 50 cm in diameter. Paripenat-leaves are compound, folio 200-250 pairs of linear-lanceolata. 4,5-5,5 m long Frondele and stalks are covered quarter length. Foliolele have 1,5-5 cm wide. Ribbed rachides may be green or bronze.

 
Davidia involucrata var. involucrata

Arbore pana la 20 m inaltime; coroana la inceput conica apoi devine neregulata, ramuri orizontale. Scoarta gri-maronie. Mugurele terminal are forma ovoida, 6-7 mm lungime, acuminat, rosu-brun inchis. Mugurii laterali 6-8 mm lungime.

 
Syringa vulgaris L.

Syringa vulgaris is a native of the mountainous regions of south-eastern Europe.

 
Magnoliopsida
Hoffmannia regalis

Evergreen shrub, 1.2 m high. Strain with 4 edges. Leaves opposite, membranous, soft, dark green upper side and reddish on the underside, nervatiune obvious, limb oblong-lanceolata, margin entire, top acute, base cuneata, 8-12 x 20-30 cm. Cime axillary inflorescences. Calyx with 4 SEPA.

 
Cyclamen persicum

Cyclamen persicum is a tuberous perennial species, originated in Persia. Cordiforme leaves, 2-14 cm long, dark green, mottled with silver, long petiole. Flowers axillary, solitary, 5 petals ciclamen reflected color, red, white, purple, floral stem of 5-15 cm tall, blooming from late winter to early spring. Fruit capsule.

 
Fothergilla

Fothergilla gardenii - small shrub, up to 1 m high. Leaves 4.8 x 1.5-5 cm, edge to the top gear. Flowers white with pink ears appear before the leaf in the terminal, stamens numerous. Blooms in April-May, prefers moist soil, well-drained, in full sun.

 
Physoplexis comosa

Herbaceous perennial, fleshy rhizome. Flexible stem, erect to decumbenta, ribbed, light purple, 8-20 cm high. Leaves petiolate, green-glauca, glabra, 5-10 cm long, leaf-ovat basal orbiculare or reniforme; caulinare lanceolata-spatulate leaves, base cuneata, top acute, edge teeth caulinare upper leaves are elliptical, bracteiforme.

 
Lychnis flos-cuckoo - cuckoo flower

Lychnis flos-cuckoo - perennial species, native to Europe, Siberia and the Caucasus, grows spontaneously in grassy places, wet the edge of ponds, through meadows and wet meadows, from 0 to 1600 m altitude.

 
   Add to iGoogle
Last posts

Categories

Links