歐洲大葉楊
歐洲大葉楊 |
中文名:歐洲大葉楊 學 名:Populus candicans Ait. 別 稱:大葉楊 界:植物界 門:被子植物門 綱:雙子葉植物綱 亞 綱:原始花被亞綱 目:楊柳目 科:楊柳科 屬:楊屬 種:歐洲大葉楊 |
歐洲大葉楊(ōu zhōu dà yè yáng,學名 Populus candicans Aiton,俗名:新疆大葉楊,異名:Populus balsamifera var. subcordata Populus balsamifera var. candicans )為喬木,喜光,抗寒。枝粗壯而開展,樹冠寬闊;小枝圓筒形,栗色,有絨毛。 產於陝西,甘肅,新疆等地。 [1]
目錄
歐洲大葉楊形態特徵
歐洲大葉楊, 喬木。枝粗壯而開展;樹冠寬闊;小枝圓筒形,栗色,有絨毛。芽大,多粘質。
萌條和大樹葉幾同形,廣卵狀三角形,長12-16厘米,寬至10厘米,先端漸尖,基部心形,稀截形,邊緣有圓鋸齒,有緣毛,上面暗綠色,下面微發白,兩面常被疏毛,沿脈更密;
葉柄圓柱形,長3-5厘米,有絨毛。
果序長至16厘米,軸密被毛;蒴果卵圓形,具柄,2瓣裂,常不育。未見雄株。花期5月。 [2]
Populus candicans Ait. Hort. Kew. 3: 406. 1789; Kom. Fl. URSS, 5: 242. 1936; Rehd. Man. Cult. Trees. and Shrubs, ed. 2. 73. 1940——P. balsamifera L. var. candicans (Ait.) A. Gray, Man. Bat. N. U. Sed. 12: 419. 1856. ——P. balsamifera L. var. subcordata Hylander, Kriissmann. Laubgeholze 2: 230. 1962.
Populus balsamifera Linnaeus var. candicans (Aiton) A. Gray; P. balsamifera var. subcordata Hylander.
Trees; crown wide. Branches stout and spreading; branchlets chestnut colored, terete, tomentose. Buds large, very viscid. Leaves of sprouts and mature trees nearly uniformly shaped; petiole terete, 3-5 cm, tomentose; leaf blade broadly ovate-deltoid, 12-16 × ca. 10 cm, abaxially whitish, adaxially dull green, both surfaces pilose, more densely so along veins, base cordate, rarely truncate, margin crenate-serrate, ciliate, apex acuminate. Fruiting catkin to 16 cm; rachis pubescent. Capsule ovoid, glabrous, 2-valved, often sterile, stipitate. Fl. May.
Planted. Xinjiang [Asia, Europe, North America, but native range uncertain, probably of hybrid origin]
No male specimens have been seen by the authors.
歐洲大葉楊生長環境
村邊,河灘,路邊等,要求深厚濕潤土壤。初期生長快,但在乾旱瘠薄的條件下,易染病蟲害。
生長於海拔480米至1,700米的地區,已由人工引種栽培。