东方狐尾藻
东方狐尾藻 |
中文名:东方狐尾藻 二名法:Myriophyllum oguraense Miki 界:植物界 门:被子植物门 纲:双子叶植物纲 目:虎耳草目 科:小二仙草科 属:狐尾藻属 |
东方狐尾藻(dōng fāng hú wěi zǎo),Myriophyllum oguraense Miki,小二仙草科、狐尾藻属多年生沉水草本植物,雌雄同株;茎枝主要在基部。 沉水叶4-或5轮生,栉状,卵形到近圆形概括地, 2.4-5.7 * 2.3-5.5 厘米;裂片在9-13对,丝状,1-3厘米;出水的叶小。 花序单或有时2-10枝穗状花序的4轮生花; 主要和侧花序2.5-9.5厘米; 苞片叶状; 小苞片白色,分布于安徽,黑龙江,湖北,江苏,江西,浙江 。 图片取自中国植物图库 。 [1]
目录
形态特征
雌雄同株;茎枝主要在基部。 沉水叶4-或5轮生,栉状,卵形到近圆形概括地, 2.4-5.7 * 2.3-5.5 厘米;裂片在9-13对,丝状,1-3厘米;出水的叶小。
花序单或有时2-10枝穗状花序的4轮生花; 主要和侧花序2.5-9.5厘米; 苞片叶状; 小苞片白色,对栉状的3裂。 雄花 萼片绿色,正三角形,0.5-0.8毫米;
花瓣白色对苍绿色的,盔状,弱的脊在基部,早落;雄蕊8。 雌花 萼片绿色,正三角形,0.4-0.6毫米; 花瓣白色,稍微盔状,早落;柱头带粉红色在花后,短。
果橄榄棕色,4室,短圆筒状; 光滑的分果爿具2背面,纵脊。花期及果期4-9月。
Plants monoecious. Stems branched mainly at base. Submerged leaves 4- or 5-whorled, pectinate, ovate to suborbicular in outline, 2.4-5.7 × 2.3-5.5 cm; segments in 9-13 pairs, filiform, 1-3 cm; emergent leaves smaller.
Inflorescence a simple or sometimes 2-10-branched spike of 4-whorled flowers; main and lateral inflorescences 2.5-9.5 cm; bracts leaflike; bracteoles white, 3-fid to pectinate.
Male flowers: sepals green, deltoid, 0.5-0.8 mm; petals white to pale green, hooded, weakly keeled at base, caducous; stamens 8. Female flowers: sepals green, deltoid, 0.4-0.6 mm; petals white, slightly hooded, caducous;
stigmas pinkish after anthesis, shortly fimbriate. Fruit olive-brown, 4-loculed, shortly cylindric; mericarps smooth with 2 abaxial, longitudinal ridges. Fl. and fr. Apr-Sep.
产地生境
Slow-flowing tributaries of the Chang Jiang basin. Anhui, Heilongjiang, Hubei, Jiangsu, Jiangxi, Zhejiang [Japan].