1. Thyrocarpus sampsonii Hance, Ann. Sci. Nat., Bot., sér. 4. 18: 225. 1862.
盾果草 dun guo cao
Bothriospermum majusculum (Hayata) Suzuki; B. tenel-lum (Hornemann) Fischer & C. A. Meyer var. majusculum Hayata.
Stems single to several, erect to ascending, frequently branched below, 20-45 cm tall, spreading hirsute, minutely hispid. Basal leaves short petiolate, spatulate, 3.5-19 × 1-5 cm, hirsute, minutely hispid, hairs discoid at base, margin entire or sparsely serrulate; stem leaves sessile, narrowly oblong to oblanceolate, smaller. Cymes axillary or extra-axillary, 7-20 cm; bracts narrowly ovate to lanceolate. Pedicel 1.5-3 mm. Calyx ca. 3 mm; lobes narrowly elliptic, spreading minutely hispid outside, short appressed pubescent. Corolla light blue or white, longer than calyx; tube ca. 2/5 as long as limb; throat appendages linear, ca. 0.7 mm, fleshy, papillose, emarginate at apex; limb 5-6 mm wide; lobes spreading, suborbicular. Filaments ca. 0.3 mm; anthers ovate-oblong, ca. 0.5 mm. Nutlets 4, black-brown, ca. 2 mm, outside layer of disc margin pale, teeth straight and not inflated, inside layer margin not inwardly constricted. Fl. and fr. May-Jul.
Slopes, thickets. Anhui, Guangdong, Guangxi, Guizhou, Henan, Hubei, Hunan, Jiangsu, Jiangxi, Shaanxi, Sichuan, Taiwan, Yunnan, Zhejiang [Vietnam].