短苞百蕊草檢視原始碼討論檢視歷史
短苞百蕊草 |
中文名:短苞百蕊草 拉丁學名:Thesium brevibracteatum 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 |
短苞百蕊草(duǎn bāo bǎi ruǐ cǎo),學名:Thesium brevibracteatum Tam,是檀香科百蕊草屬下的一個植物種。分布在內蒙古。模式標本采自錫林郭勒盟。 [1]
短苞百蕊草形態特徵
亞灌木狀草本,高達30厘米;根莖近圓錐狀,長約8厘米,頂端直徑約1厘米,黃褐色;莖細長,常直立,部分斜升,堅韌,有縱條溝,橫切面呈四棱形。
葉稀疏,線形,長約2.5厘米,頂端短尖,具單脈,無柄,邊緣有肉質微刺。總狀花序多花;花漏斗狀,白色,長8毫米,有時更長;
苞片1枚,狹線形,長5-7毫米;小苞片2枚,鑽狀,長3毫米左右,均向上彎拱;花梗長5毫米,有細縱紋;花被管圓筒狀,長3毫米,花被裂片5,狹長圓形,長4毫米,頂端銳尖,內彎;
雄蕊長2毫米;子房柄長0.8-1毫米,花柱長2.5毫米,內藏。堅果卵圓形,長3-3.5毫米,寬2.5-3毫米,表面約有10條縱脈並有近平行或斜出的支脈,但不呈網狀;
宿存花被漏斗狀,長約4毫米,比果長;果柄長5-6毫米。花果期8-9月。
Herbs subshrublike; rootstock yellowish brown, ± conic, ca. 8 cm, tip ca. 10 mm thick. Stems usually erect, partly ascending, rigid, slender, to 30 cm, 4-ribbed, furrowed. Leaves sparse, sessile, linear, ca. 25 mm, 1-veined, margin minutely denticulate, apex acute.
Inflorescences racemelike, many flowered; bracts narrowly linear, 5-7 mm; pedicel ca. 5 mm, finely striate; bracteoles 2, subulate, ca. 3 mm, curved. Perianth 5-merous, white, funnelform, ca. 8 mm, sometimes longer, tube tubular, ca. 3 mm, lobes narrowly oblong, ca. 4 mm, apex acute, incurved.
Stamens ca. 2 mm. Ovary stalk 0.8-1 mm. Style 2.5 mm, not exserted. Nutlet ovoid, 3-3.5 × 2.5-3 mm, with 10, nearly parallel or obliquely lateral veins, not reticulate; persistent perianth funnelform, ca. 4 mm, longer than fruit; stalk 5-6 mm. Fl. and fr. Aug-Sep.
短苞百蕊草生長環境
生長於砂丘的向陽處。