《中国植物志》|| 百部科 STEMONACEAE ||百部属 Stemona Lour. ||直立百部 Stemona sessilifolia (Miq.) Miq.

2.直立百部（中药志）图版62：1
Stemona sessilifolia (Miq.) Miq., Prol. Fl. Jap. 386. 1867; Franch. et Savat. , Enum. Pl. Jap. 2: 92. 1879; C. H. Wright in Journ. Linn. Soc. Bot. 32: 942. 1896; Schltr. in Notizbl. Bot. Gart. Berlin 9 : 193. 1924; 中国高等植物图鉴5: 420. 图7670. 1976; 江苏植物志 (上册) : 345. 1977; Tsi in Act. Phytotax. Sin. 16 (1) : 43. 1978. ——Roxburghia sessilifolia Miq. , Ann. Mus. Bot. Lugd. -Bat. 2: 211. 1865 66. ——Stemona erecta C. H. Wright in Kew Bull. 117. 1895.
半灌木。块根纺锤状，粗约1厘米。茎直立，高30-60厘米，不分枝，具细纵棱。叶薄革质，通常每3-4枚轮生，很少为5或2枚的，卵状椭圆形或卵状披针形，长3.5-6厘米，宽1.5-4厘米，顶端短尖或锐尖，基部楔形，具短柄或近无柄。花单朵腋生，通常出自茎下部鳞片腋内；鳞片披针形，长约8毫米；花柄向外平展，长约1厘米，中上部具关节；花向上斜升或直立；花被片长1-1.5厘来，宽2-3毫米，淡绿色；雄蕊紫红色；花丝短；花药长约3.5毫米，其顶端的附属物与药等长或稍短，药隔伸延物约为花药长的2倍；子房三角状卵形。蒴果有种子数粒。花期3-5月，果期6-7月。
产浙江、江苏、安徽、江西、山东、河南等省。常生于林下，也见于药圃栽培。日本引入栽培。模式标本采自日本。
根药用，与百部同。

《Flora of China》|| Stemonaceae || Stemona ||直立百部 Stemona sessilifolia

1. Stemona sessilifolia (Miquel) Miquel, Prolus. Fl. Jap. 386. 1867.

直立百部 zhi li bai bu

Roxburghia sessilifolia Miquel, Ann. Mus. Bot. Lugduno-Batavi 2: 211. 1866; Stemona erecta C. H. Wright.

Subshrubs. Roots ca. 1 cm thick. Stems erect, simple, 30--70 cm, ribbed. Leaves 2--5-whorled, shortly petiolate or subsessile; leaf blade obovate- or ovate-elliptic or ovate-lanceolate, 3.5--6 × 1.5--4 cm, base cuneate, apex shortly acute. Inflorescences borne in scale axils at base of stem, 1-flowered; pedicel 1--1.5 cm, articulate near or above middle; bracts scalelike, ca. 8 mm. Perianth segments pale green, ovate-lanceolate, 10--15 × 2--4 mm. Stamens purple, shorter than perianth or only slightly so; filaments 2--4 mm, stout; anthers ca. 3.5 mm; appendages adherent, adaxial one flat, broad, 5--7 mm. Capsule (from Japan) ovoid, 7--9 × 4--6 mm, 1- or 2-seeded. Fl. Mar--May, fr. Jun--Jul.

* Mountain slopes. Anhui, Fujian, Henan, Hubei, Jiangsu, Jiangxi, Shandong, Zhejiang [?Japan].

The roots are used medicinally.

Also see LI En-Xiang & FU Cheng-Xin. 2007. A new synonym of Stemona sessilifolia (Stemonaceae). Acta Phytotax. Sin. 45: 399-402, in which the authors treated S. shandongensis D. K. Zang as synonymous with this taxon.