假还阳参

Crepidiastrum lanceolatum (Houtt.) Nakai in Bot. Mag. Tokyo 34: 150. 1920; Kitam. in Act. Phytotax. Geobot. 10: 27. 1941 et 11: 133. 1942; Hara, Enum. Sperm. Jap. 2: 189. 1952; S. Y. Hu in Quart. Journ. Taiwan Mus. 19(3-4): 218. 1966. H. L. L., Fl. Taiwan 4: 842. 1978. —— Prenanthes lanceolata Houtt., Nat: Hist. II 10: 383. 1779. —— P. integra Thunb., Fl. Jap. 300, 1784. —— Chondrilla lanceolata (Houtt.) Poret, Encycl. Suppl. 2: 329. 1811. —— Youngia lanceolata (Houtt.) DC., Prodr. 7: 193. 1838. —— Crepis lanceolata Sch. - Bip. in Zoll., Syst. Verz. Ind. Jap. 2: 126. 1854, nom. nud.; Makino in Bot. Mag. Tokyo 17: 87. 1903. —— C. integra (Thunb.) Miq. in Ann. Mus. Bot. Lugd. — Bat. 2: 190. 1865-1866; Forbes et Hemsl. in Journ. Linn. Soc. Bot. 23: 475. 1888. —— Hieracium integrum (Thunb.) O. Kuntze, Rev. Gen. 1: 345. 1891. —— Lactuca lanceolata (Houtt.) Makino in Bot. Mag. Tokyo 27: 257. 1913. —— Ixeris lanceolata (Houtt.) Stebbins in Journ. Bot. Brit. For. 75: 46. 1937, non Chang 1932. —— Crepis koshunensis Hayata, Ic. Pl. Formos. 8: 79. 1918. —— Crepidiastrum koshunense (Hayata) Nakai in Bot. Mag. Tokyo 34: 149. 1920. —— Ixeris koshunensis (Hayata) Stebbins in Journ. Bot. Brit. For. 75: 45. 1937.

基生叶匙形，长10-12厘米，宽2-2.5厘米，顶端钝或圆形，基部收窄，边缘全缘，稍厚，两面无毛。茎叶小，披针形，长3.5厘米，宽1.5厘米，稀疏排列。头状花序稀疏伞房花状排列。总苞圆柱状钟状，长5-6毫米；总苞片2层，外层小，披针形，内层长，披针形，长5毫米，顶端钝，两面无毛。全部小花舌状，花冠管外面被柔毛。瘦果扁，近圆柱状，长4毫米，有10条纵肋。冠毛白色，长3.5毫米，糙毛状。产日本。

这个种还有两个变型，它们是：