密花節節菜檢視原始碼討論檢視歷史
| 密花節節菜 |
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中文學名:密花節節菜 拉丁學名:Rotala densiflora (Roth) Koehne 界:植物界 門:被子植物門 Angiospermae 綱:雙子葉植物綱 Dicotyledoneae 科:千屈菜科 屬:節節菜屬 種:密花節節菜 |
密花節節菜(mì huā jié jié cài，學名 Rotala densiflora (Roth) Koehne，異名：Sellowia uliginosa Ammannia densiflora Rotala densiflora subsp. uliginosa )，一年生濕生草本。葉對生，橢圓狀長圓形或披針形，花無梗，蒴果半球形，主要分布於我國廣東北江，印度、非洲。喜生於水濕地上。 [1]
密花節節菜形態特徵
一年生草本，基部常伏地；莖高7-10厘米而多分枝，或有時可達20厘米而少分枝。
葉交互對生，無柄，橢圓狀矩圓形、披針形或長橢圓形，長約12毫米，大的可達30毫米，生於枝梢或分枝上的長約5毫米，寬1.5-5毫米，頂端鈍尖或短尖，基部闊，下面葉脈極不明顯。
花無梗，單生葉腋，緊接，但不組成穗狀花序；小苞片毛狀，約與花萼等長；萼筒鐘形，結實時半球形，長1-2毫米，裂片5，短齒狀，稀3或4，裂片間附屬體剛毛狀；花瓣5倒卵形或近圓形，與花萼裂片等長或為其長的2倍，有顏色，頂端常微凹；雄蕊5，有時4或3，花柱長度為子房的1/2-2/3倍或過之。
蒴果近球形，3裂。花、果期8月。 [2]
Rotala densiflora (Roth) Koehne in Engl., Bot. Jahrb. 1: 164. I880, ibid. 4: 388. 1883 et in Engl. Pflanzenr. 17 (IV-216): 35. f. 3c. 1903; Backer et Bakh. f., Fl. Java 1: 25 3. 1963; Van Leeuwen in Blumes 19: 55-56. 1971. ——Ammannia densiflora Roth in Roem. et Schult., Syst. 3: 304. 1818; DC., Prodr. 3: 79. 1828. ——Sellowia uligznosa Roth op, cit. s: 407. 1819; Roth, Nov. sp. Ind. or. 163. 1821, DC., Prodr. 3: 380. 1828.——Rotala roxburghiana Wight, Icon. t, 2608. 1840, excl. syn. Ammannia pentandra.——Rotala desiflora subsp. uligosa Koehne in Engl., Bot. Jahrb. 1: 165. 1880.
Herbs, annual, terrestrial or amphibious, 7-10[-40] cm. Stem usually creeping, sparsely to densely branched, 4-winged, wings not running into leaves. Leaves decussate, often alternate toward stem apex, narrowly elliptic, linear-lanceolate, oblong, or ovate, [2-]12-30 × 1.5-5 mm, base cordate to obtuse, apex obtuse, acute, or acuminate. Bracts of stem and lower branches like foliage leaves; bracts of axillary branchlets much smaller and broadly ovate, clasping. Flowers solitary in axils on main stem or in axillary spikes; bracteoles pink, lanceolate, equaling to surpassing floral tube. Floral tube (4 or)5-merous, campanulate, 1-2 mm; sepals (3-)5; epicalyx segments present between sepals, setiform, ca. 1/2 as long as to longer than sepals. Petals (4 or)5, bright pink or white, equal to or surpassing sepals, persistent. Stamens (3-)5; anthers reaching margin of floral tube. Ovary globose; style shorter than ovary, slightly exserted. Capsules subglobose, ca. 1.5 mm in diam., included, 3-valved. Seeds ca. 0.5 mm. Fl. and fr. Aug.
密花節節菜生長環境
生長於濕地上。