Ludwigia × taiwanensis
台灣水龍
如頁面顯示有問題,請填寫回報表單
如有任何意見也請留言,謝謝。
名彙資訊
學名發表文獻
Peng, Botanical bulletin of Academia Sinica 31: 344. 1990. (Bot. Bull. Acad. Sin., 中央硏究院植物學彙刊)
台灣首次記錄發表文獻
同發表文獻
異名
-
Jussiaea repens auct. non L.Forbes & Hemsl., The journal of the Linnean Society of London. Botany 23: 309. 1887. (J. Linn. Soc., Bot.)
-
Ludwigia peploides (HBK.) Raven ssp. stipulacea (Ohwi) Raven
各語言俗名
-
中過江龍. 水龍. 水江龍.
-
日みずちようじ. みずさんばい.
-
台Chúi kháu lêng. Kè kau lêng. Chúi kang lêng. Kè kang lêng.
參考資料
-
Yang, A list of plants in Taiwan . 1982. (List Pl. Taiwan, 台灣植物名彙)
特徵描述
生活型
herb
形態特徵
- Perennial herb with creeping or floating stems, to 60 cm long, rooting freely at nodes, sometimes with white, upward, spindle-shaped aerophores arising in clusters at the node of the floating stem; stems glabrous, branched, the tips ascending.
- Leaves narrowly elliptic to spatulate-oblong, 0.7–9.5 cm long, 0.4–2.7 cm wide, glabrous, the apex rounded or obtuse, margin entire, base narrowly cuneate or attenuate, the petioles 5–30 mm long.
- . Flowers in leaf axils of ascending stems. Bracteoles deltoid, in pairs near the base of the ovary. Sepals 5, narrowly triangular- lanceolate, deciduous, 8–12 mm long, 1.6–2.5 mm wide, glabrous to hirtellous. Petals 5, pale yellow, broadly obovate, apex truncate or obtuse, sometimes semi-unfolded, base attenuate, 13- 18 mm long, 9–12 mm wide. Stamens 10, antesepalous stamens alternating with slightly shorter antepetalous stamens; anthers indehiscent or barely dehiscent, extrorse, 1.3–1.8 mm long, filaments 2–3.5 mm long. Pollen grains nearly always aborted, shriveled and unstainable. Disc with 5 depressed, V-shaped nectaries each fringed with dense, villous hairs. Style 5–7 mm long, glabrous; stigma discoid.
- Mature capsules lacking.
- 2 n= 24. A natural triploid hybrid species between Ludwigia adscendens (L.) Hara, a tetraploid, and L. peploides (Kunth) Raven ssp. stipulacea (Ohwi) Raven, a diploid; the latter taxon does not occur in Taiwan.
物候
Flowers May-Dec.
分布
- 台灣 : Throughout the lowlands of Taiwan, forming pure stands or mixed with other aquatic weeds in drainage ditches, fallow and wet paddies, along river banks, about waste swampy grounds and the borders of fish ponds or reservoirs.
- 世界 : Widely distributed in southern China
引證標本
TAIPEI: Kuanyinshan, Kuo 4761. KEELUNG: Oldham s. n. 1864. TAOYUAN: Sasaki s. n. 1923. HSINCHU: Hukou, Peng 3215; Hsiangshan, Peng 6334. MIAOLI: Tonghsiao, Peng 5443; Yuanli, Peng 10575. TAICHUNG: by Chungcheng Park, Peng 10409; Tachiahsi, Kao 10054. NANTOU: Puli, DeVol 7502; Suili River, Peng 6556. CHIAYI: city park, Peng 6975. TAINAN: Peimen, Chiali, Morimoto 80. KAOHSIUNG: Doi 20; Henry s. n., s.d. PENGHU: Makung, Anchai, Peng 12755. PINGTUNG: Hengchun, Kawakami & Ito s. n. 1909. HUALIEN: Hsincheng, Chen s. n. 1981.
引用文獻
典藏標本
共有 29 份典藏標本
黃俊溢 Juinn-yih Huang, Nai-luen Huang, Hsiao-mei Hsu
屏東 Pingtung
黃星凡 S.F.Huang
台北 Taipei
T.Y.Yang
台中 Taichung
高木村 M.T.Kao
台中 Taichung
鄭武燦 Wu-Tsang Cheng
台北 Taipei
郭城孟 C.M.Kuo
台北 Taipei
郭城孟 C.M.Kuo
台中 Taichung
郭城孟 C.M.Kuo
苗栗 Miaoli
Jeng, 高木村 M.T.Kao
台北 Taipei
C.C.Chuang
台北 Taipei
莊燦陽 T.I.Chuang
台北 Taipei
棣慕華 C.E.DeVol
南投 Nantou
Morimoto
台南 Tainan
土屋
高雄 Kaohsiung
Shen, Lin
台北 Taipei
台北 Taipei
田中長三郎 T.Tanaka, 島田彌市 Y.Shimada
Keelung
田中長三郎 T.Tanaka, 島田彌市 Y.Shimada
Keelung
田中長三郎 T.Tanaka, 島田彌市 Y.Shimada
Keelung
鈴木重良 S.Suzuki
南投 Nantou
工藤祐舜 Kudo, Sasaki
南投 Nantou
工藤祐舜 Kudo, Sasaki
南投 Nantou
佐佐木舜一 S.Sasaki
Keelung
佐佐木舜一 S.Sasaki
Keelung
佐佐木舜一 S.Sasaki
桃園 Taoyuan
佐佐木舜一 S.Sasaki
台北 Taipei
平塚佐吉
台北 Taipei
鈴木時夫 T.Suzuki
台北 Taipei
曾懷德 Tsang, Wai-Tak, L.U.