密花節節菜
密花節節菜 |
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]
目錄
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。