柔弱斑种草 rou ruo ban zhong cao

Anchusa zeylanica J. Jacquin, Ecl. Pl. Rar. 1: 47, t. 29. 1812; A. tenellum Hornemann; Bothriospermum asperugoides Siebold & Zuccarini; B. tenellum (Hornemann) Fischer & C. A. Meyer; B. tenellum var. asperugoides (Siebold & Zuccarini) Maximowicz.

Herbs annual, 15-30 cm tall. Stems slender, crowded, erect or prostrate, much branched, appressed hispid. Leaf blade elliptic to narrowly elliptic, 1-2.5 cm × 5-10 mm, sparsely short appressed bristly or strigose, base broadly cuneate, apex obtuse, mucronulate. Racemes numerous, lax after anthesis; lower bracts few, lanceolate, 1.5-5 mm, apex acute; upper bracts very small. Pedicel 1-2 mm, not elongated or somewhat elongated in fruit. Calyx 1-1.5 mm, to 3 mm in fruit, with short ascending white bristles. Corolla blue or pale blue, 1.5-1.8 mm, base ca. 1 mm wide, slightly longer than calyx; throat appendages ca. 0.2 mm; limb 2.5-3 mm wide; lobes orbicular, ca. 1 mm. Style terete, ca. 0.5 mm. Nutlets gray, oval-reniform, 1-1.2 mm, aperture longitudinally elliptic. Fl. and fr. Feb-Oct.

Grain fields, hillside meadows, river banks, shaded moist areas. Fujian, Guangdong, Guangxi, Guizhou, Hainan, Hebei, Heilongjiang, Hunan, Jiangxi, Jilin, Liaoning, Nei Mongol, Ningxia, Shaanxi, Shandong, Shanxi, Sichuan, Taiwan, Yunnan, Zhejiang [Afghanistan, India, Indonesia (Java, naturalized), Japan, Kazakhstan, Korea, Kyrgyzstan, Pakistan, Russia, Tajikistan, Turkmenistan, Uzbekistan, Vietnam].