鸭儿芹Cryptotaenia japonica Hassk.

别名：大鸭脚板;鹅脚根;六豆菜;六月寒;三叶芹;水白芷;水蒲莲;水芹菜根;铜箍散;土当归;香麻子;鸭脚板;鸭脚板芹;鸭脚菜;鸭脚根;野板芹;野芹菜;

科名：伞形科 Umbelliferae

属名：鸭儿芹属 Cryptotaenia

《中国植物志》第55(2)卷019页
  1．鸭儿芹（植物学大辞典）
  Cryptotaenia japonica Hassk. Retz. 1: 113. 1856; Maxim. in Bul. Acad. Sci. St. Petersb. 31: 49. 1887; Yabe in Journ. Coll. Sci. Imp. Univ. Tokyo 16 (4): 39. 1902; de Boiss. in Bull. Herb. Boiss. 2 (3): 841. 1903 et in Bull. Acad. Geogr. Bot. 16: 183. 1906 et in Bull. Soc. Bot. France 53: 430. 1906, et in Levl. Fl. Kouy-Tcheou 296. 1915; Belval, Notes Bot. Chinois (Jiangsu) 6, 1931; 江苏南部种子植物手册551, 图891. 1959; 秦岭植物志1 (3): 396. 1981. ——Cryptotaenia canadensis auct. non DC. : Franch. in Nouv. Mus. Paris 2 (8): 247. 1886; Forbes et Hemsl. in Journ. Linn. Soc. Bot. 23: 329. 1888; Diels in Engl. Bot. Jahrb. 29: 294. 1901; Pampanini in Nuov. Giron. Bot. Ital. Nouv. Ser. 17: 679. 1910; Dunn et Tutcher Fl. Kwangtung et Hongkong 117. 1912. ——Cryptotaenia canadensis (L.) DC. var. japonica (Hassk.) Makino in Bot. Mag. Tokyo 22: 175. 1908; Wolff in Engl. Pflanzenr. 90 (IV. 228): 112. 1927.——Cyptotaenia canadensis (L.) DC. subsp. japonica (Hassk.) Hand. -Mazz. , Symb. Sin. 7: 713. 1933.
形态特征：多年生草本，全体无毛；花白色，双悬果条状矩圆形或卵状矩圆形。
分    布：各地均有
生    境：林下阴云湿处
繁殖方式：种子
习    性：阳生
药用部位：全草
药用功能：尿闭、肿毒
药用主治：尿闭、肿毒

《Flora of China》 Vol. 14 (2005)
Cryptotaenia japonica  Hasskarl
鸭儿芹   ya er qin
Plants 20–100 cm. Basal and lower petioles 5–20 cm, with oblong sheaths; blade triangular to broad-ovate, 2–14 × 3–7 cm; middle leaflets rhombic-obovate or cordate, 2–9 × 1.5–10 cm; lateral leaflets obliquely long-ovate to obovate, 1.5–8 × 1–6 cm. Bracts absent or 1, linear, 4–10 × 0.5–1.5 mm; rays 2–3, 0.5–3.5 cm, very unequal; bracteoles 1–3, subulate, 4–10 mm; pedicels 2–4, 1–14 mm, very unequal. Calyx teeth 0.1–0.3 mm, unequal. Petals 1–1.2 × ca. 0.6–1 mm. Fruit 4–6 × 1–1.5 mm. Fl. and fr. Feb–Oct. n = 11*.
Damp places in forests, ditches; 200–2400 m. Anhui, Fujian, Gansu, Guangdong, Guangxi, Guizhou, Hebei, Hubei, Hunan, Jiangsu, Jiangxi, Shaanxi, Shanxi, Sichuan, Taiwan, Yunnan [Japan, Korea].
This species is used in traditional Chinese medicine as a tonic for strengthening the body. It is a distinctive, widespread taxon exhibiting almost continuous variation in leaf and inflorescence form across the range. It is here treated as a species (with three forms: f. japonica, f. dissecta (Y. Yabe) Hara, and f. pinnatisecta S. L. Liou) closely resembling, but distinct from, the North American Cryptotaenia canadensis (Linnaeus) de Candolle.

《全国中草药汇编》:鸭儿芹

【拼音名】 Yā ér Qín
【别名】 鸭脚板、鹅脚板
【来源】 伞形科鸭儿芹属植物鸭儿芹Cryptotaenia joponica Hassk.，以全草入药。夏秋采收，洗净晒干。
【性味】 辛，温。
【功能主治】 祛风止咳，活血祛瘀。用于感冒咳嗽，跌打损伤；外用治皮肤搔痒。
【用法用量】 2～5钱；外用适量，煎水洗患处。
【摘录】 《全国中草药汇编》