異葉節節菜檢視原始碼討論檢視歷史
異葉節節菜 |
中文學名:異葉節節菜 拉丁學名:Rotala diversifolia Koehne 界:植物界 門:被子植物門 Angiospermae 綱:雙子葉植物綱 Dicotyledoneae 目:桃金娘目 Myrtiflorae 科:千屈菜科 Lythraceae 屬:節節菜屬 Rotala 種:異葉節節菜 分布區域:我國僅在海南島及 |
異葉節節菜,拉丁文名:Rotala diversifolia Koehne.千屈菜科、節節菜屬一年生草本,高8-30厘米;莖具4 棱而有4闊翅,基部少有分枝。葉無柄,交互對生,狹矩圓形,部的漸小,頂端鈍形,基部闊而近心形,抱莖,全緣,兩面均無毛,側脈纖細,子房近球形,花柱與子房等長,柱頭頭狀。[1]
異葉節節菜形態特徵
一年生草本,高8-30厘米;莖具4 棱而有4闊翅,基部少有分枝。葉無柄, 異葉節節菜 交互對生,狹矩圓形,長8-25毫米,寬3-8毫米,上部的漸小,頂端鈍形,基部闊而近心形,抱莖,全緣,兩面均無毛,側脈纖細,5對或更多。
穗狀花序生於莖上部的葉腋,多數,通常長3-5厘米,有時達l0厘米;總花梗短,長約5,毫米;苞片葉狀,矩圓狀披針形,長4-6 毫米,寬1.5-2毫米,沿中脈摺疊,平展而下彎;小苞片2枚,極小,着生於苞片的基部,白色,干膜質;
萼筒闊鐘形,長約2毫米,裂片4-5,三角形,漸尖,長約為萼筒之半,無附屬體;花瓣4-5,宿存,倒卵形,頂端圓形或微凹,長約為一花萼裂片的2倍,淡紫色,雄蕊4-5,着生於萼筒下部且與萼筒等長;子房近球形,3室,長約1毫米,花柱與子房等長,柱頭頭狀。
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].
異葉節節菜生長環境
生長於水旁濕地,不常見的野草。
異葉節節菜分布範圍
我國僅在海南島(保亭)及廣西(桂林)有分布;分布於越南、老撾及泰國。
異葉節節菜屬下種類
異葉節節菜 (海南植物志)圖版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.