Description from Flora of China
Bubon buchtormensis Fischer in Sprengel, Pl. Min. Cogn. Pug. 2: 55. 1815; Libanotis cycloloba Gilli; Seseli buchtormense (Fischer) W. D. J. Koch; Seseli cyclolobum (Gilli) Pimenov & Sdobnina; Seseli giraldii Diels.
Plants 20–80 cm. Taproot ca. 1.5 cm thick, caudex simple. Stem rigid, branched from base or above, strongly angled, fluted, glabrous. Petioles triangular-flattened in cross section, adaxially shallowly fluted; blade oblong-ovate or lanceolate, 5–12 × 2.5–7 cm, 2-pinnatisect, glabrous; pinnae sessile or very shortly petiolulate; ultimate segments ovate or obovate-cuneate, 5–30 × 3–15 mm, with 3–5 incised mucronate teeth, abaxially papillate only along rachis and veins. Umbels 7–12 cm across, peduncles stout, angled and branching; bracts usually absent, occasionally few, linear, small; rays 30–50, 0.8–4(–7) cm, equal, angled, tomentose; bracteoles 8–15(–20), linear, ca. equal to pedicels, villous; pedicels 2–5 mm. Calyx teeth linear-subulate to lanceolate, ca. 0.7 mm, pubescent. Petals white, abaxially densely pubescent. Fruit ellipsoid, slightly dorsally compressed, 2–4.5 × 1.5–2.5 mm, densely tomentose or squamose-scaly, especially along ridges; all ribs prominent, acute, equally keeled; vittae 1 in each furrow, 2 on commissure. Fl. and fr. Jul–Nov.
This species has reputed medicinal value (in Shaanxi).
Two of us (Pimenov & Kljuykov, FOC 14: 129. 2005) treat this as Seseli buchtormense.
Grassy places, sunny rocky slopes, river banks, rock crevices; 1000–3000 m. S Gansu (Huixian, Tianshui), Ningxia, SW Shaanxi (Meixian, Taibai), W Sichuan (Kangding), N Xinjiang (Altay, Tekes, Toli) [Afghanistan, Kazakhstan, Kyrgyzstan, Mongolia, Pakistan, Russia (Siberia)].