歐洲庭薺檢視原始碼討論檢視歷史
歐洲庭薺 |
中文學名:歐洲庭薺 拉丁學名:Trib. Lepidieae DC. 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:罌粟目 亞 目:白花菜亞目 科:十字花科 族:庭薺族 屬:庭薺屬 |
歐洲庭薺(學名:Alyssum alyssoides)為十字花科庭薺屬下的一個種,為一年生草本植物。 [1]
歐洲庭薺形態特徵
一年生草本,高10-20厘米,被星狀毛。
莖於基部分枝,分枝初仰臥,後直立,上部再分枝或否。莖生葉較多,葉片窄長圓狀條形或窄長圓狀倒卵形,以中、上部的葉最長,長1.7-2.5厘米,寬1.5-2.5毫米,頂端急尖、鈍尖或鈍圓,基部漸窄成柄。
花序傘房狀,果期伸長;萼片窄橢圓形,兩端收縮,頂端漸尖,有窄白邊緣,長約3毫米,寬約1.5毫米,外面除星狀毛外,還雜有長、短單毛,宿存;花瓣白色,條狀,長約3.5毫米,寬0.5-0.7毫米,頂端2淺裂,基部漸窄,爪不明顯,外面有微小單毛與少數星狀毛;花絲無翅與齒。
短角果有窄邊,中間凸起,頂端微凹;果梗長2-3.5毫米,斜向上展開,星狀毛中雜有長單毛。
種子每室2粒,梨狀卵形,長約1毫米,黃褐色。花期5月。
Herbs annual, 5-35(-50) cm tall, canescent with appressed, sessile, 6-10-rayed stellate trichomes, these mixed with simple and forked ones on pedicels and sepals. Stems erect, ascending, or decumbent, 1 to several from the base. Cauline leaves subsessile or lowermost shortly petiolate; leaf blade narrowly oblanceolate or linear, sometimes spatulate or obovate, 3-4(-4.5) cm × (0.5-)1-3.5(-5) mm, base attenuate or cuneate, apex obtuse or acute. Fruiting pedicels divaricate or ascending, 2-5(-6) mm, slender, straight, covered with stellate trichomes mixed with fewer, simple and forked ones. Sepals oblong, (1.5-)2-3 × 0.7-1.1 mm, persistent, pubescent as pedicels. Petals white or pale yellow, linear to linear-oblanceolate, rarely obovate, 2-3(-4) × 0.3-0.7(-1) mm, glabrous or sparsely stellate outside, often persistent, apex emarginate. Filaments 1-1.5 mm, slender, neither appendaged nor toothed; anthers ovate, 0.15-0.2 mm. Ovules 2 per locule. Fruit orbicular, (2-)3-4(-5) mm in diam., apex emarginate or truncate; valves not veined, uniformly inflated at center, strongly flattened at margins, sparsely stellate; style 0.3-0.6(-1) mm, slender, usually glabrous. Seeds 1 or 2 per locule, oblong or ovate, 1.1-2 × 0.7-1.1 mm, compressed, narrowly margined all around, margin ca. 0.1 mm wide. Fl. and fr. May-Jul. 2n = 32.
歐洲庭薺生長環境
模式標本采自歐洲。 主要生長在歐洲種,亞洲僅見於我國旅順及日本,長田政夫也指出它系日本的歸化植物。
歐洲庭薺分布範圍
歐洲庭薺產遼寧(旅順)。主要分布在歐洲,非洲北部和北美洲、印度也有分布。