4. Diarthron tianschanicum (Pobedimova) Kit Tan, Notes Roy. Bot. Gard. Edinburgh. 40: 220. 1982.
天山假狼毒 tian shan jia lang du
Stelleropsis tianschanica Pobedimova, Bot. Mater. Gerb. Bot. Inst. Komarova Akad. nauk S.S.S.R. 12: 153. 1950.
Herbs perennial, 15-30 cm tall. Rhizome woody, yellowish brown or light brown. Stems 10-20, erect, unbranched, herbaceous or slightly woody near base, glabrous; leaf scars green, small. Leaves alternate; petiole ca. 1 mm; leaf blade oblong-elliptic to narrowly elliptic, 1.4-2 × 0.3-0.5 cm, herbaceous, both surfaces glabrous, base broadly cuneate, margin slightly revolute or not, sparsely white ciliate, apex acute or slightly acuminate; midrib conspicuous, flattened on both surfaces or raised abaxially; lateral veins 3-5 pairs, second proximal pair usually longer, ± visible on both surfaces. Inflorescences terminal, capitate or shortly racemose, to 1 cm, 15-20-flowered. Pedicel short, 1-2 mm, articulate at apex, glabrous. Calyx reddish; tube funnel-shaped-cylindric, 9-12 mm, articulate, contracted above ovary after anthesis, exterior glabrous; lobes 4, narrowly ovate or ovate-lanceolate, 5-7 × 1.5-2.2 mm, apex obtuse. Stamens 8, upper whorl on and slightly below throat; filaments short; anthers oblong, ca. 1 mm, base and apex retuse. Disk annular, oblique, enclosing base of ovary, margin usually toothed. Ovary ellipsoid, ca. 1.3 mm, brown pilose above middle or at apex, stipitate; style filiform, short; stigma globose. Drupe green, ellipsoid, enclosed in persistent calyx. Fl. Jun, fr. Aug.
Sunny and dry slopes, sandy places; 1700-2000 m. Xinjiang (Zhaosu) [C Asia].