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黔阳过路黄 |
中文学名:黔阳过路黄 二名法:Lysimachia sciadophylla 界:植物界 门:被子植物门 纲:双子叶植物纲 亚 纲:合瓣花亚纲 目:报春花目 科:报春花科 族:珍珠菜族 属:珍珠菜属 亚 属:黄连花亚属 组:过路黄组 系:叶头系 |
黔阳过路黄(学名:Lysimachia sciadophylla)是报春花科珍珠菜属的植物,为我国的特有植物。
黔阳过路黄形态特征
茎2-3条簇生,直立,高18-40厘米,圆柱形,中部节间长5-9厘米,无毛,不分枝或有少数分枝;枝纤细,仅顶端具叶。
叶对生,茎端的3-4对密聚,近轮生状,放射状展开,基部的1-2对较小,狭椭圆形,长1.8-3厘米,宽9-12毫米,先端锐尖,基部渐狭,具短柄;叶柄基部稍作耳状扩展,半抱茎状。上部茎叶狭披针形,长3.5-7厘米,宽4-9毫米,先端长渐尖,有时向一侧稍弯,基部渐狭,近于无柄,上面疏被柔毛,下面无毛或仅沿中脉被疏毛、两面均密生粒状无色腺点,侧脉纤细,不明显。
花4至多朵,在茎端和枝端密聚成头状花序状;苞片卵状披针形至披针形,比花萼长,边缘具铁锈色缘毛;花梗长0.5-2.5毫米;花萼长约8毫米,分裂近达基部,裂片钻形,无毛,两面密生粒状无色腺点;花冠黄色,长约12毫米,基部合生约4毫米,裂片椭圆状倒卵形,宽约4.5毫米,先端锐尖;花丝基部合生成高约3毫米的筒,分离部分长2-5毫米;花药腺形,长达2毫米;花粉粒近球形 [(34-36) × (31-32)微米],表面具网状纹饰;子房无毛,花柱长达10.5毫米。
花期4-5月。
Herbs perennial, 18--40 cm tall. Stems erect, simple or weakly branched, glabrous. Branches leafy only at apex. Leaves opposite, upper 3 or 4 pairs compactly crowded. Lower leaves smaller; petiole very short, base auriculate, semi-clasping; leaf blade narrowly elliptic, 1.8--3 X 0.9--1.2 cm, base attenuate, apex acute. Medial and upper leaves subsessile, narrowly lanceolate, 35--70 X 4--9 mm, abaxially glabrous or pilose on midvein, densely transparent glandular punctate, adaxially pilose, base attenuate, apex acuminate; veins inconspicuous. Inflorescences terminal, capitate, 4- to many flowered; bracts ovate-lanceolate, longer than calyx, margin rust-colored pubescent. Pedicel 0.5--2.5 mm. Calyx lobes subulate, ca. 8 mm, glabrous, with scattered raised transparent glands. Corolla yellow; tube ca. 4 mm; lobes elliptic-obovate, ca. 8 X 4.5 mm, apex acute. Filaments connate basally into a ca. 3 mm high tube, free parts 2--5 mm; anthers linear, dorsifixed, opening by lateral slits, ca. 2 mm. Ovary glabrous; style to 1 cm. Capsule unknown. Fl. Apr-May.
- Woodland margins, under shrubs. SW Hunan (Qianyang Xian).
黔阳过路黄地理分布
产于湖南西南部。
生于林缘和灌丛中。