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池杉Taxodium distichum var. imbricatum

时间:2013-07-15 16:01来源:未知 作者:徐晔春 点击:
池杉,Taxodium distichum var. imbricatum








中文名(Chinese Name):池杉
学名(Scientific Name):Taxodium distichum var. imbricatum (Nutt.) Croom
英文名(English Common Name):
别名(Chinese Common Name):沼落羽杉
异名(Synonym):Taxodium ascendens Brongn;Cupressus disticha var. imbricata Nutt.;Glyptostrobus lineatus (Poir.) Druce;Thuja lineata Poir.;Taxodium imbricatum (Nutt.) R. M. Harper;Taxodium lineatum (Poir.) Druce;Taxodium distichum var. ascendens (Brongn.) Mast.;Taxodium microphyllum Brongn.;Taxodium imbricarium (Nutt.) R. M. Harper;Cupressus disticha var. imbricaria Nutt.;Taxodium distichum var. imbricarium (Nutt.) Sarg.;Taxodium ascendens f. nutans (Aiton) Rehder;Taxodium ascendens var. pendulum (J.Forbes) C.K.Schneid.;Taxodium distichum f. pendulum (J.Forbes) Beissn.;Taxodium distichum var. fastigiatum Knight ex Carrière 
科属(Family & Genus):杉科(Taxodiaceae)落羽杉属
形态特征(Description):乔木,在原产地高达25米;树干基部膨大,通常有屈膝状的呼吸根(低湿地生长尤为显著);树皮褐色,纵裂,成长条片脱落;枝条向上伸展,树冠较窄,呈尖塔形;当年生小枝绿色,细长,通常微向下弯垂,二年生小枝呈褐红色。叶钻形,微内曲,在枝上螺旋状伸展,上部微向外伸展或近直展,下部通常贴近小枝,基部下延,长4-10毫米,基部宽约1毫米,向上渐窄,先端有渐尖的锐尖头,下面有棱脊,上面中脉微隆起,每边有2-4条气孔线. 球果圆球形或矩圆状球形,有短梗,向下斜垂,熟时褐黄色,长2-4厘米,径1.8-3厘米;种鳞木质,盾形,中部种鳞高1.5-2厘米;种子不规则三角形,微扁,红褐色,长1.3-1.8厘米,宽0.5-1.1厘米,边缘有锐脊。花期3-4月,球果10月成熟。
分布(Distribution):原产北美东南部,耐水湿,生于沼泽地区及水湿地上。我国江苏南京、南通和浙江杭州、河南鸡公山、湖北武汉等地有栽培,生长良好,都用为低湿地的造林树种或作庭园树。
用途(Use):
引自中国植物志英文版FOC Vol. 4 |
Taxodium distichum var. imbricatum (Nuttall) Croom, Cat. Pl. New Bern, ed. 2. no. 3048. 1837.
池杉 chi shan Taxodiaceae  | Taxodium
Cupressus disticha var. imbricata Nuttall, Gen. N. Amer. Pl. 2: 224. 1818; ?C. disticha var. nutans Aiton; Glyptostrobus lineatus (Poiret) Druce; Taxodium ascendens Brongniart; ?T. ascendens var. nutans (Aiton) Rehder; ?T. distichum var. nutans (Aiton) Sweet (1827), not Carriere (1867); T. imbricatum (Nuttall) R. M. Harper; Thuja lineata Poiret.
Main branches ascending. Leaves on annual branchlets not 2-ranked, mostly subulate, a few linear and flat.
Used for afforestation on marshy soils. Anhui, Fujian, Henan (Jigong Shan), Hubei (Wuhan Shi), Jiangsu (Nanjing Shi, Nantong Shi), Jiangxi, Zhejiang (Hangzhou Shi) [native to SE United States]
Vegetative material of var. imbricatum is superficially almost indistinguishable from Glyptostrobus pensilis. However, the appressed, subulate leaves of the former are more distinctly alternate, softer in texture, and with an incurved apex; while the spreading, linear leaves lack the thin, winglike margin along their trailing edge that is a feature of G. pensilis.
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