Ludwigia hyssopifolia
細葉水丁香
Ludwigia hyssopifolia (G. Don) Exell
名彙資訊
特徵描述
典藏標本
數位照片
分布位置
相關資訊
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名彙資訊
學名發表文獻
Exell, Garcia de Orta 5: 471. 1957.
台灣首次記錄發表文獻
Raven, Flora of Taiwan 3: 893. 1977. (Fl. Taiwan, 台灣植物誌)
異名
無
各語言俗名
-
日ほそばみずきんばい.
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
- Annual herb 5–300 cm tall, often persisting and becoming woody at the base; young growth and inflorescence minutely puberulent; elongate pneumatophores arising from buried submerged roots.
- Leaves lanceolate, 1–9 cm long, 0.2–3 cm wide, narrowly cuneate at the base, the apex acuminate; submarginal vein not prominent; petioles 2.5–18 mm long.
- Sepals 4, lanceolate, 2–4 mm long, 0.7–1.2 mm wide, finely puberulent. Petals yellow, fading orange-yellow, elliptical, 2–3 mm long, 1–2 mm wide. Stamens 8, pale greenish-yellow, the epipetalous ones shorter; filaments of episepalous stamens 1–2 mm long, those of the epipetalous ones 0.5–1 mm long; anthers 0.4-0.6 mm wide; 0.2-0.3 mm high, shedding pollen directly onto the stigma at anthesis. Pollen grains shed individually. Disc slightly elevated, with a depressed ciliate nectary surrounding the base of each epipetalous stamen. Style pale greenish-yellow, 1–1.5 mm long; stigma depressed-globose, shallowly 4-lobed.
- Capsule relatively thin-walled, finely puberulent, 15–30 mm long, 1–1.2 mm thick, subterete, enlarged in the upper 1/6 to 1/3, subsessile. Lower seeds uniseriate in each locule of the capsule, nearly vertical, brown, oblong, 0.7-0.85 mm long, each firmly embedded in a cube of relatively hard endocarp; raphe about 1/3 the diameter of the body. Seeds in upper inflated portion of the capsule multiseriate, free, ovoid, 0.35-0.5 mm long. Lower part of capsule at first marked by distinct bumps corresponding to the position of the uniseriate seeds, but as the endocarp hardens and swells, the capsule becomes smooth.
分布
- 台灣 : Rather frequent in Taiwan.
- 世界 : Pantropical weed of wet places at low elevations.
引證標本
TAIPEI: Nankang, Peng 7009; Hsintien, Peng 12212. ILAN: Tachou, Chao et al. 4965. TAOYUAN: Shanchuhu, Peng 13523; Lungtan, Peng 7216. HSINCHU: Yulo River, Peng 12138; Shanchiao, Peng 10404. MIAOLI: Tonghsiao, Peng 5440; Yuanli, Peng 11100. TAICHUNG: city, Peng 6338. TAINAN: Hsinhua, Peng 13289; Tungshan, Peng 8901. PINGTUNG: Wanchin, Peng 10136
引用文獻
典藏標本
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