黔陽過路黃檢視原始碼討論檢視歷史
黔陽過路黃 |
中文學名:黔陽過路黃 二名法:Lysimachia sciadophylla 界:植物界 門:被子植物門 綱:雙子葉植物綱 亞 綱:合瓣花亞綱 目:報春花目 科:報春花科 族:珍珠菜族 屬:珍珠菜屬 亞 屬:黃連花亞屬 組:過路黃組 系:葉頭系 |
黔陽過路黃(學名:Lysimachia sciadophylla)是報春花科珍珠菜屬的植物,為我國的特有植物。
黔陽過路黃形態特徵
莖2-3條簇生,直立,高18-40厘米,圓柱形,中部節間長5-9厘米,無毛,不分枝或有少數分枝;枝纖細,僅頂端具葉。
葉對生,莖端的3-4對密聚,近輪生狀,放射狀展開,基部的1-2對較小,狹橢圓形,長1.8-3厘米,寬9-12毫米,先端銳尖,基部漸狹,具短柄;葉柄基部稍作耳狀擴展,半抱莖狀。上部莖葉狹披針形,長3.5-7厘米,寬4-9毫米,先端長漸尖,有時向一側稍彎,基部漸狹,近於無柄,上面疏被柔毛,下面無毛或僅沿中脈被疏毛、兩面均密生粒狀無色腺點,側脈纖細,不明顯。
花4至多朵,在莖端和枝端密聚成頭狀花序狀;苞片卵狀披針形至披針形,比花萼長,邊緣具鐵鏽色緣毛;花梗長0.5-2.5毫米;花萼長約8毫米,分裂近達基部,裂片鑽形,無毛,兩面密生粒狀無色腺點;花冠黃色,長約12毫米,基部合生約4毫米,裂片橢圓狀倒卵形,寬約4.5毫米,先端銳尖;花絲基部合生成高約3毫米的筒,分離部分長2-5毫米;花葯腺形,長達2毫米;花粉粒近球形 [(34-36) × (31-32)微米],表面具網狀紋飾;子房無毛,花柱長達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).
黔陽過路黃地理分布
產於湖南西南部。
生於林緣和灌叢中。