Davidia involucrata var. vilmoriniana : 無料・フリー素材/写真
Davidia involucrata var. vilmoriniana / wallygrom
| ライセンス | クリエイティブ・コモンズ 表示-継承 2.1 |
|---|---|
| 説明 | Nymans Garden near Handcross in West Sussex ... a lovely sunny spring day!Davidia involucrata (Dove Tree, Handkerchief Tree, Pocket Handkerchief Tree, Ghost Tree) is a medium-sized deciduous tree, usually placed in the Tupelo family (Nyssaceae), but sometimes included (with the Tupelos) in the Dogwood family (Cornaceae), and by yet others given family status of its own, as Davidiaceae. It is native to South Central and Southwest China from Hubei to southern Gansu, south to Guizhou, Sichuan and Yunnan.D. involucrata is the only member of its genus, but there are two varieties differing slightly in their leaves, D. involucrata var. involucrata, which has the leaves thinly pubescent (short-haired) on the underside, and D. involucrata var. vilmoriniana, with glabrous (hairless) leaves. Some botanists treat them as distinct species, with good reason, as the two taxa have differing chromosome numbers so are unable to produce fertile hybrid offspring.The genus Davidia is named for Father Armand David (1826–1900), ("Père David"), a French Vincentian missionary and keen naturalist who lived in China. David first described the tree in 1869 as a single tree found at over 2,000 m (6,562 ft) altitude, and sent dried specimens to Paris; in 1871, Henri Baillon described it as a new genus and species.Scottish plant hunter Augustine Henry again found a single tree, this time in the Yangtse Ichang gorges and sent the first specimen to Kew Gardens. Plant collector Ernest Henry Wilson was employed by Sir Harry Veitch to find Henry's tree but arrived to find that it had been felled for building purposes; however, he later found a grove of the trees overhanging a sheer drop. Wilson too had his boat wrecked but managed to save his Davidia specimens.The species was introduced from China to Europe and North America in 1904, and is a popular ornamental tree in parks and larger gardens. Most trees in cultivation are var. vilmoriniana, which has proved much better able to adapt to the climatic conditions in the west. |
| 撮影日 | 2014-03-15 15:31:09 |
| 撮影者 | wallygrom |
| タグ | |
| 撮影地 | Handcross, England, United Kingdom 地図 |
| カメラ | Canon PowerShot SX200 IS , Canon |
| 露出 | 0.003 sec (1/400) |
| 開放F値 | f/4.0 |
| 焦点距離 | 10 mm |