10
Jan
2010
Davidia involucrata var. involucrata
Trees and shrubs | Magnoliopsida

Denumire stiintifica – Davidia involucrata var. involucrata

Sinonime

Denumiri populare – Taubenbaum, handkerchief tree, dove tree, gong tong, albero dei fazzoletti.

Distributie si Habitat – originar din sud-vestul Chinei, unde creste la 1200 – 1600 m altitudine.

Descriere – 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. Frunze altene, lung petiolate, lat-ovoida, 8-16 cm lungime, acuminate, baza cordiforma, nervuri evidente,  verde pe partea superioara, ± hirsute pe partea inferioara, stipele absente. Flori lung pedunculate, flori rosii grupate in capitul, 1-2 cm diametru, 2 bractee, 20-25 cm lungime, la inceput verzi dar devin albe odata cu maturitatea florilor; bracteele cad la sfarsitul antezei; rolul bracteelor este de a proteja polenul de ploaie. Infloreste in aprilie-mai. Fruct drupa, elipsoidala, mezocarp carnos, contine pana la 8 seminte. 2n = 21

Rata de crestere – moderat-repede, aproximativ 0.5 m pe an, si poate ajunge la 7-8 m in 20 de ani.

Tolerante – insorirea si semiumbra.

Cerinte – prefera soluri bogate, umede, bine-drente, pH 6.5 – 7.

Management – necesita udari regulate.

Propagare – prin seminte, se planteaza intregul fruct deoarece coaja protejeaza semintele de uscare, care poate inhiba germinarea semintelor. Germinarea are loc dupa 5-8 luni. Puietii trebuie protejati de inghet.

Boli si Daunatori – nu se cunosc probleme serioase.

Parteneri de gradina – Rhododendron sp.

Cultivaruri

Proprietati si Utilizari – poate fi cultivata ca specie ornamentala in parcuri si gradini.

Curiozitati – Davidia involucrata a fost descoperita in 1869 de catre Armand David (1826-1900) un franciscan francez, si a fost introdusa in Europa si numit in onoarea sa in 1904 de catre Ernest Wilson.Florile sunt bogate in nectar si atrag diferite tipuri de insecte polenizatoare precum Apis sp., Halictus sp., Lasioglossum sp. si Xylocopa sp.

Bibliografie

Dina M. Miller - 400 Trees and Shrubs for Small Spaces – Timber Press, 2008

John Simmons – Managing the Wet Garden – Timber Press, 2008

Kim E. Tripp, J. C. Raulston – The Year in Trees – Timber Press, 2001

Peter Loewer – The Evening Garden - Timber Press, 2002

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