草地百蕊草檢視原始碼討論檢視歷史
草地百蕊草 |
中文名:草地百蕊草 拉丁學名:Thesium orgadophilum Tam 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:檀香目 亞 目:檀香亞目 科:檀香科 族:百蕊草族 屬:百蕊草屬 組:百蕊草組 |
草地百蕊草(cǎo dì bǎi ruǐ cǎo),學名 Thesium orgadophilum Tam,是檀香科百蕊草屬植物。產於西藏,生長於海拔4000米高山草甸中。 [1]
草地百蕊草形態特徵
草本,高3-5厘米;根莖圓柱狀,頗粗,直徑約5毫米;莖細長,有縱溝,上部綠色,基部附近黃白色。
葉密生,長圓狀披針形,長1.5-1.8厘米,寬2.5-3毫米,頂端短尖,基部漸狹並下延,兩面均深綠色,具3脈。
花單一,腋生,卵圓形,長4-5毫米,寬約3毫米,花梗絲狀,長2.5毫米;苞片倒披針狀線形,有時呈葉狀,長1厘米,着生於花梗的基部,具單脈;
小苞片2枚,對生,葉狀,長3.5毫米;花被常裂至中部,裂片5,狹條狀,長3毫米,頂端近鈍尖,內彎;雄蕊5枚,長2毫米,着生於花被裂片基部,花絲短而扁;
子房柄粗短,長1.5毫米,花柱圓柱狀,長3.5毫米,柱頭頭狀,淡黃色。花期5月。
Herbs perennial; rhizomes terete, ca. 5 mm thick. Stems ascending, slender, 3-5 cm, furrowed, base yellowish white. Leaves dense, oblong-lanceolate, 15-18 × 2.5-3 mm, both surfaces deep green, 3-veined, base gradually narrowed and decurrent, apex acute.
Inflorescences racemelike, with few or no branches, 1 flower per axil; bracts at base of pedicels, oblong-lanceolate, sometimes leaflike, ca. 10 mm, 1-veined; pedicel filiform; bracteoles 2, leaflike, ca. 3.5 mm.
Perianth 5-merous, ovoid, 4-5 × ca. 3 mm, usually divided to middle, lobes linear, ca. 3 mm, apex obtuse, incurved. Stamens 5, ca. 2 mm; filaments short and flat. Ovary stalk thick and short, ca. 1.5 mm. Style terete, ca. 3.5 mm; stigma pale yellow, capitate. Fruit not seen. Fl. May.
- Grassy alpine marshlands; ca. 4000 m. Xizang.
The type collection, from Nyalam Xian, is of an immature plant; fruiting material is needed to assess the relationships of this taxon.
分類文獻
Thesium orgadophilum Tam in Bull. Bot. Resear. 1 (3) : 72. f. 2. 1981.
草地百蕊草生長環境
主要生長於海拔4000米的高山草甸中。
草地百蕊草分布範圍
主要分布在我國西藏地區。