2007年11月20日 (火) | 編集 |
http://mozmoz.web.infoseek.co.jp/lapis08.htm
Blackgum(Nyssa sylvatica)
この木は世界三大紅葉樹のひとつと言われます。
他のふたつは
Oxydendrum arboreum（和名：スズランノキ）とEuonymus alatus（和名：ニシキギ）だそうです。
www.botanic.jp/ plants-na/numami.htm
北アメリカの東部から中南部、カナダのオンタリオ州南部からアメリ
カのフロリダ州、それにテキサス州東部まで分布しています。高原や
渓谷の広葉樹林やマツ林に生え、高さは１５〜３０メートルになりま
す。樹皮は灰色から暗褐色で、深い割れ目が長方形に入ります。葉
は楕円形から長楕円形で互生し、全縁です。秋には真っ赤に紅葉し
ます。早春に新葉の基部から長い花柄をのばし、目立たない黄緑色
の花を咲かせます。雌雄異株です。果実は核果で、秋に青黒色に熟
します。
オオギリ科ヌマミズキ属の落葉高木で、学名は Nyssa sylvatica。
英名は Blackgum, Black tupelo。
アメリカ・テキサス州ダラス市「ダラス植物園」にて、
2006年04月14日撮影。(photo by Jon Suehiro)
Oxydendrum arboreum（和名：スズランノキ）
http://www.sourwoodhoney.com/
Euonymus alatus（和名：ニシキギ） (burningbush)
Euonymus alatus was introduced into the USA from northeastern Asia around 1860 for use as an ornamental shrub. The bright red fall foliage of E. alatus makes this shrub a popular ornamental planting, and it is commonly planted along interstate highways, as hedges, and in foundation plantings. While it behaves well in urban areas, E. alatus planted near woodlands, mature second-growth forests, and pastures can be problematic. It has been observed escaping from cultivation in the northeast and midwest, notably in Connecticut [11], Virginia [6, 9, 10], Pennsylvania [5], and Illinois [1, 3, 8]. E. alatus is a threat to woodland areas, fields, and coastal scrubland because it outcompetes native species.
GIST Home
Invasives 101
TNC projects
Invasives planning & strategies
Invasives & control methods
Photo archive
Red alerts!
Global resources
Invasives news
Links & internet resources
Site sponsors
Privacy
Alert Archives
Weed Alert!
Euonymus alatus (Thunb.) Siebold
(burning bush, winged euonymus, winged wahoo, winged spindle-tree, Japanese spindle-tree)
Summary: known invaders sighted in new areas
Euonymus alatus was introduced into the USA from northeastern Asia around 1860 for use as an ornamental shrub. The bright red fall foliage of E. alatus makes this shrub a popular ornamental planting, and it is commonly planted along interstate highways, as hedges, and in foundation plantings. While it behaves well in urban areas, E. alatus planted near woodlands, mature second-growth forests, and pastures can be problematic. It has been observed escaping from cultivation in the northeast and midwest, notably in Connecticut [11], Virginia [6, 9, 10], Pennsylvania [5], and Illinois [1, 3, 8]. E. alatus is a threat to woodland areas, fields, and coastal scrubland because it outcompetes native species.
Description:
(Click on thumbnail images for a closer view)
Fall fruit & leaves
Fall foliage
Green & red foliage
Escaping seedlings
Unwinged stems
Winged stems
Euonymus alatus (Thunb.) Siebold (Celastraceae--the staff-tree family) is a deciduous shrub. E. alatus is slow growing but can reach 4.6-6.1 meters in height (and width). The bark is gray-brown and the stems have prominent, corky wings running along both sides. In some cultivars, these wings can be greatly reduced to mere ridges. The leaf-buds are brownish-green, and strongly divergent. The leaves are opposite, elliptic, and measure 2.5-7.6 cm long and 1.3-3.2 cm wide with fine, sharp serrations on the margin. In autumn the dark green leaves turn a brilliant purplish red to scarlet color before dropping to the ground. In Pennsylvania the flowers bloom in late April to late June. The flowers are small, yellowish green in color and inconspicuous. The smooth, purplish fruit are 1.3 cm long and are present in September through October. Each fruit contains approximately four red to orange seeds.
Scientific and Common Names:
The common name, "winged euonymus", is derived from the corky wings along the stem. The name "burning bush" is from the fall color of the leaves. Euonymus, roughly translated, comes from the Greek meaning "good name" or "of good repute." The species name, alatus, is in reference to the prominent corky wings on the stems of the shrub. Synonyms for E. alatus include "Celastrus alata Thunb.", "Celastrus striata Thunb.", and "Euonymus striata (Thunb.) Loes.".
Impacts:
This new invader is becoming increasingly common in Connecticut, Virginia, Pennsylvania, and Illinois. It has been observed making dense thickets in Pennsylvania [5]. These thickets can shade out native herbs and crowd out native shrubs. Euonymus alatus also has the following characteristics:
1)E. alatus is adaptable to various environmental conditions; it grows well in different soil types and pH levels, has no serious pest problems in North America, and most importantly of all is tolerant of full shade.
2)Spectacular fall foliage makes it a popular landscape ornamental. Wide usage of this plant increases the probability that more will escape from cultivation.
Native Range:
Euonymus alatus is native to northeastern Asia to central China.
Blackgum(Nyssa sylvatica)
この木は世界三大紅葉樹のひとつと言われます。
他のふたつは
Oxydendrum arboreum（和名：スズランノキ）とEuonymus alatus（和名：ニシキギ）だそうです。
www.botanic.jp/ plants-na/numami.htm
北アメリカの東部から中南部、カナダのオンタリオ州南部からアメリ
カのフロリダ州、それにテキサス州東部まで分布しています。高原や
渓谷の広葉樹林やマツ林に生え、高さは１５〜３０メートルになりま
す。樹皮は灰色から暗褐色で、深い割れ目が長方形に入ります。葉
は楕円形から長楕円形で互生し、全縁です。秋には真っ赤に紅葉し
ます。早春に新葉の基部から長い花柄をのばし、目立たない黄緑色
の花を咲かせます。雌雄異株です。果実は核果で、秋に青黒色に熟
します。
オオギリ科ヌマミズキ属の落葉高木で、学名は Nyssa sylvatica。
英名は Blackgum, Black tupelo。
アメリカ・テキサス州ダラス市「ダラス植物園」にて、
2006年04月14日撮影。(photo by Jon Suehiro)
Oxydendrum arboreum（和名：スズランノキ）
http://www.sourwoodhoney.com/
Euonymus alatus（和名：ニシキギ） (burningbush)
Euonymus alatus was introduced into the USA from northeastern Asia around 1860 for use as an ornamental shrub. The bright red fall foliage of E. alatus makes this shrub a popular ornamental planting, and it is commonly planted along interstate highways, as hedges, and in foundation plantings. While it behaves well in urban areas, E. alatus planted near woodlands, mature second-growth forests, and pastures can be problematic. It has been observed escaping from cultivation in the northeast and midwest, notably in Connecticut [11], Virginia [6, 9, 10], Pennsylvania [5], and Illinois [1, 3, 8]. E. alatus is a threat to woodland areas, fields, and coastal scrubland because it outcompetes native species.
GIST Home
Invasives 101
TNC projects
Invasives planning & strategies
Invasives & control methods
Photo archive
Red alerts!
Global resources
Invasives news
Links & internet resources
Site sponsors
Privacy
Alert Archives
Weed Alert!
Euonymus alatus (Thunb.) Siebold
(burning bush, winged euonymus, winged wahoo, winged spindle-tree, Japanese spindle-tree)
Summary: known invaders sighted in new areas
Euonymus alatus was introduced into the USA from northeastern Asia around 1860 for use as an ornamental shrub. The bright red fall foliage of E. alatus makes this shrub a popular ornamental planting, and it is commonly planted along interstate highways, as hedges, and in foundation plantings. While it behaves well in urban areas, E. alatus planted near woodlands, mature second-growth forests, and pastures can be problematic. It has been observed escaping from cultivation in the northeast and midwest, notably in Connecticut [11], Virginia [6, 9, 10], Pennsylvania [5], and Illinois [1, 3, 8]. E. alatus is a threat to woodland areas, fields, and coastal scrubland because it outcompetes native species.
Description:
(Click on thumbnail images for a closer view)
Fall fruit & leaves
Fall foliage
Green & red foliage
Escaping seedlings
Unwinged stems
Winged stems
Euonymus alatus (Thunb.) Siebold (Celastraceae--the staff-tree family) is a deciduous shrub. E. alatus is slow growing but can reach 4.6-6.1 meters in height (and width). The bark is gray-brown and the stems have prominent, corky wings running along both sides. In some cultivars, these wings can be greatly reduced to mere ridges. The leaf-buds are brownish-green, and strongly divergent. The leaves are opposite, elliptic, and measure 2.5-7.6 cm long and 1.3-3.2 cm wide with fine, sharp serrations on the margin. In autumn the dark green leaves turn a brilliant purplish red to scarlet color before dropping to the ground. In Pennsylvania the flowers bloom in late April to late June. The flowers are small, yellowish green in color and inconspicuous. The smooth, purplish fruit are 1.3 cm long and are present in September through October. Each fruit contains approximately four red to orange seeds.
Scientific and Common Names:
The common name, "winged euonymus", is derived from the corky wings along the stem. The name "burning bush" is from the fall color of the leaves. Euonymus, roughly translated, comes from the Greek meaning "good name" or "of good repute." The species name, alatus, is in reference to the prominent corky wings on the stems of the shrub. Synonyms for E. alatus include "Celastrus alata Thunb.", "Celastrus striata Thunb.", and "Euonymus striata (Thunb.) Loes.".
Impacts:
This new invader is becoming increasingly common in Connecticut, Virginia, Pennsylvania, and Illinois. It has been observed making dense thickets in Pennsylvania [5]. These thickets can shade out native herbs and crowd out native shrubs. Euonymus alatus also has the following characteristics:
1)E. alatus is adaptable to various environmental conditions; it grows well in different soil types and pH levels, has no serious pest problems in North America, and most importantly of all is tolerant of full shade.
2)Spectacular fall foliage makes it a popular landscape ornamental. Wide usage of this plant increases the probability that more will escape from cultivation.
Native Range:
Euonymus alatus is native to northeastern Asia to central China.
| ホーム |
プロフィール
ブログ内検索