青菜Brassica chinensis Linn.

别名：小油菜;油白菜;小白菜;白菜;白菜仔;白菘;不结球白菜;江门白菜;散白菜;菘菜;淘木-查干-诺高;小青菜;油菜;油菜子;芸苔;

科名：十字花科 Brassicaceae

属名：芸薹属 Brassica

《中国植物志》第33卷025页
  10. 青菜（通称）小白菜（通称），油菜（东北），小油菜（经济植物手册）
  Brassica chinensis L. Gent. Pl. 1: 19. 1755 et Amoen. Acad. 4: 280. 1759; L. H. Bailey in Gent. Herb. 1: 99. f. 46. 47. 1922 et 2: 25. f. 135. 136. 1930; T. Y. Cheo in Bot. Bull. Acad. Sin. 2 (3): 181. 1948; 广州植物志113. 1956; 江苏南部种子植物手册318. 图504. 1959; 北京植物志上册, 335. 图281. 1962; 海南植物志1: 355. 1964; 中国高等植物图鉴2: 34. 图1797. 1972; 秦岭植物志1 (2): 399. 1974; 湖北植物志2: 39. 图版733. 1979; 东北草本植物志4: 50. 图版28. 1980. ——B. napus L. var. chinensis (L.) O. E. Schulz in Engl. , Pflanzenr. 70 (4. 105): 45. 1919.

《Flora of China》 Vol. 8 (2001)
Brassica rapa var. chinensis  (Linnaeus) Kitamura
青菜   qing cai
Brassica chinensis Linnaeus, Amoen. Acad. 4: 280. 1759; B. antiquorum H. Léveillé; B. campestris Linnaeus subsp. chinensis (Linnaeus) Makino; B. campestris subsp. chinensis var. amplexicaulis (Tanaka & Ono) Makino; B. campestris subsp. narinosa (L. H. Bailey) G. Olsson; B. campestris var. chinensis (Linnaeus) T. It?; B. campestris var. narinosa (L. H. Bailey) Kitamura; B. campestris var. parachinensis (L. H. Bailey) Makino; B. chinensis var. communis M. Tsen & S. H. Lee; B. chinensis var. parachinensis (L. H. Bailey) Sinskaya; B. chinensis var. rosularis M. Tsen & S. H. Lee; B. napus Linnaeus var. chinensis (Linnaeus) O. E. Schulz; B. narinosa L. H. Bailey; B. oleracea var. tsiekentsiensis H. Léveillé; B. parachinensis L. H. Bailey; B. oleracea Linnaeus var. chinensis (Linnaeus) Prain; B. rapa subsp. chinensis (Linnaeus) Hanelt; B. rapa subsp. chinensis var. parachinensis (L. H. Bailey) Hanelt; B. rapa subsp. narinosa (L. H. Bailey) Hanelt; B. rapa subsp. chinensis var. rosularis (M. Tsen & S. H. Lee) Hanelt; B. rapa var. amplexicaulis Tanaka & Ono; Raphanus chinensis (Linnaeus) Crantz (1769), not Miller (1768).
Plants annual or rarely biennial. Taproot not fleshy, cylindric. Basal leaves usually more than 20, strongly rosulate, not forming compact heads; petiole fleshy or thickened, semiterete or transversely oblong in cross section, wingless; leaf blade entire or repand. Fl. Apr-May, fr. May-Jun. 2n = 20*.
Cultivated primarily as an oilseed plant and less so as a vegetable. Throughout China [widely cultivated elsewhere].
Some forms are grown in S China for seed oil. They are known as Brassica chinensis var. oleifera Makino & Nemoto, but such distinction is dubious.