异叶节节菜
异叶节节菜 |
中文学名:异叶节节菜 拉丁学名:Rotala diversifolia Koehne 界:植物界 门:被子植物门 Angiospermae 纲:双子叶植物纲 Dicotyledoneae 目:桃金娘目 Myrtiflorae 科:千屈菜科 Lythraceae 属:节节菜属 Rotala 种:异叶节节菜 分布区域:我国仅在海南岛及 |
异叶节节菜,拉丁文名:Rotala diversifolia Koehne.千屈菜科、节节菜属一年生草本,高8-30厘米;茎具4 棱而有4阔翅,基部少有分枝。叶无柄,交互对生,狭矩圆形,部的渐小,顶端钝形,基部阔而近心形,抱茎,全缘,两面均无毛,侧脉纤细,子房近球形,花柱与子房等长,柱头头状。[1]
目录
异叶节节菜形态特征
一年生草本,高8-30厘米;茎具4 棱而有4阔翅,基部少有分枝。叶无柄, 异叶节节菜 交互对生,狭矩圆形,长8-25毫米,宽3-8毫米,上部的渐小,顶端钝形,基部阔而近心形,抱茎,全缘,两面均无毛,侧脉纤细,5对或更多。
穗状花序生于茎上部的叶腋,多数,通常长3-5厘米,有时达l0厘米;总花梗短,长约5,毫米;苞片叶状,矩圆状披针形,长4-6 毫米,宽1.5-2毫米,沿中脉折叠,平展而下弯;小苞片2枚,极小,着生于苞片的基部,白色,干膜质;
萼筒阔钟形,长约2毫米,裂片4-5,三角形,渐尖,长约为萼筒之半,无附属体;花瓣4-5,宿存,倒卵形,顶端圆形或微凹,长约为一花萼裂片的2倍,淡紫色,雄蕊4-5,着生于萼筒下部且与萼筒等长;子房近球形,3室,长约1毫米,花柱与子房等长,柱头头状。
蒴果近球形,3瓣裂。花期11月。
Rotala diversifolia Koehne in Engl., Jahrb: 77 f 1907; Gagnep. in Lecomte, F. l. Gen. Indo-Chine 2: 974. Pl. 105. f. 6-7. 1913; Chun, Acta Phytotax. Sinica 8: 264. 1963;海南植物志1: 421. 1964.
Herbs, annual, terrestrial or amphibious, 8-30 cm. Stem branched, 4-winged; wings white, broad, extending into margins of leaves and bracts. Leaves decussate, narrowly oblong to lanceolate, 8-25 × 3-8 mm, base broad, cordate, clasping, apex obtuse. Bracts lanceolate to oblong, smaller on lateral inflorescences, 4-6 mm × 1.5-2 mm. Flowers solitary, subsessile, in bracts of axillary spikes; bracteoles minute, at base of floral tube, scarious. Floral tube 4-merous, broadly campanulate, 1-2 mm; sepals 4, pink-tinged, deltate, ca. 1/3 as long as floral tube, acuminate; epicalyx absent. Petals 4, obovate. Stamens 4, anthers reaching margin of floral tube. Ovary globose; style exserted. Capsules globose, ca. 1.5 mm in diam., 3-valved. Seeds ca. 0.5 mm. Fl. Nov.
Wet places by water. Guangxi, Hainan [NE India (Darjeeling), Laos, Thailand, Vietnam].
异叶节节菜生长环境
生长于水旁湿地,不常见的野草。
异叶节节菜分布范围
异叶节节菜属下种类
异叶节节菜 (海南植物志)图版19: 5-7
Rotala diversifolia Koehne in Engl., Jahrb: 77 f 1907; Gagnep. in Lecomte, F. l. Gen. Indo-Chine 2: 974. Pl. 105. f. 6-7. 1913; Chun, Acta Phytotax. Sinica 8: 264. 1963;海南植物志1: 421. 1964.