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银边翠Euphorbia marginata

时间:2013-09-10 12:12来源:未知 作者:徐晔春 点击:
中文名 ( Chinese Name ): 银边翠 学名 ( Scientific Name ): Euphorbia marginata Pursh 英文名 ( English Common Name ): snow on the mountain 别名 ( Chinese Common Name ): 高山积雪 异名 ( Synonym ): Tithymalus variegatus (Sims) H
中文名Chinese Name):银边翠
学名Scientific Name):Euphorbia marginata Pursh
英文名English Common Name):snow on the mountain
别名Chinese Common Name):高山积雪
异名Synonym):Tithymalus variegatus (Sims) Haw.  Lepadena leucoloma (Raf.) Raf.  Lepadena marginata (Pursh) Nieuwl.  Tithymalus marginatus (Pursh) Cockerell  Agaloma marginata (Pursh) Á.Löve & D.Löve  Dichrophyllum marginatum (Pursh) Klotzsch & Garcke  Dichrophyllum variegatum (Sims) Klotzsch & Garcke  Euphorbia bejariensis DC.  Euphorbia leucoloma Raf.  Tithymalus marginatus f. inornata Daniels  Tithymalus marginatus var. tetramerus Cockerell  Euphorbia marginata var. uloleuca Engelm. & A.Gray
科属(Family & Genus):大戟科(Euphorbiaceae)大戟属
形态特征(Description):一年生草本。根纤细,极多分枝,长可达20厘米以上,直径3-5毫米。茎单一,自基部向上极多分枝,高可达60-80厘米,直径3-5毫米,光滑,常无毛,有时被柔毛。叶互生,椭圆形,长5-7厘米,宽约3厘米,先端钝,具小尖头,基部平截状圆形,绿色,全缘;无柄或近无柄;总苞叶2-3枚,椭圆形,长3-4厘米,宽1-2厘米,先端圆,基部渐狭。全缘,绿色具白色边;伞幅2-3,长1-4厘米,被柔毛或近无毛;苞叶椭圆形,长1-2厘米,宽5-7 (9)毫米,先端圆,基部渐狭,近无柄花序单生于苞叶内或数个聚伞状着生,基部具柄,柄长3-5毫米,密被柔毛;总苞钟状,高5-6毫米,直径约4毫米,外部被柔毛,边缘5裂,裂片三角形至圆形,尖至微凹,边缘与内侧均被柔毛;腺体4,半圆形,边缘具宽大的白色附属物,长与宽均超过腺体。雄花多数,伸出总苞外;苞片丝状;雌花1枚,子房柄较长,长达3-5毫米,伸出总苞之外,被柔毛;子房密被柔毛;花柱3,分离;柱头2浅裂。蒴果近球状,长与直径均约5.5毫米,具长柄,长达3-7毫米,被柔毛;花柱宿存;果成熟时分裂为3个分果爿。种子圆柱状,淡黄色至灰褐色,长3.5-4毫米,直径2.8-3毫米。被瘤或短刺或不明显的突起;无种阜。花果期6-9月。
分布(Distribution):原产北美,广泛栽培于旧大陆;我国大多数省区市均有栽培。
用途(Use):FOC Vol. 11 Page 289, 297
Euphorbia marginata Pursh, Fl. Amer. Sept. 2: 607. 1814.
银边翠 yin bian cui  | Euphorbiaceae  | Euphorbia
Herbs, annual, up to 60-90 cm tall. Root fibrous, 3-5 mm thick, with many rootlets. Stem single, many from base, 3-5 mm thick, smooth, usually glabrous, sometimes less pilose. Leaves alternate, sessile or subsessile; leaf blade elliptic, 5-7 × ca. 3 cm, green, base truncate-rounded, margin entire, apex obtuse, with small tip. Primary involucral leaves 2 or 3, green with white margin, elliptic, 3-4 × 1-2 cm, base attenuate, margin entire, apex rounded, primary rays 2 or 3, 1-4 cm, pubescent or subglabrous; secondary involucral leaves elliptic, 1-2 cm × 5-7(-9) mm, attenuate at base, subsessile, apex obtuse. Cyathia single from axils of involucral leaves or numerous clustered, peduncle 3-5 mm, densely pilose; involucre campanulate, 5-6 × ca. 4 mm, pubescent outside, 5 lobes, lobes triangular to rounded, apex acute to emarginate, pubescent inside; glands 4, rounded, appendages white, longer and wider than gland. Male flowers many, exserted from involucre; bracts linear. Female flower: pedicel 3-5 mm, exserted from cup; ovary densely pilose; styles free, persistent; stigma slightly 2-lobed. Capsule subglobose, ca. 5.5 × 5.5 mm, pilose; fruiting pedicel 3-7 mm. Seeds globose-terete, 3.5-4 × 2.8-3 mm, light yellow to gray-brown, with tuberose or inconspicuous enation; caruncle absent. Fl. and fr. Jun-Sep.
Escaped and naturalized. Anhui, Fujian, Guangdong, Guangxi, Guizhou, Hainan, Hubei, Hunan, Jiangsu, Jiangxi, Ningxia, Shandong, Sichuan, Taiwan, Yunnan, Zhejiang; also cultivated in N China [native to North America; naturalized in the Old World].
Euphorbia marginata is sometimes grown for the cut flower trade.




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