Description from Flora of China
Sedum tenuifolium Franchet, J. Bot. (Morot) 10: 290. 1896, not Strobl (1884).
Herbs annual. Roots fibrous. Flowering stems erect, subrobust, 10-13 cm, leafy. Leaf blade linear-lanceolate, 5-10 × ca. 1 mm, base shortly spurred, apex subacute. Cyme corymbiform, many flowered; bracts linear-lanceolate. Flowers unequally 5-merous; pedicel 1-3 mm. Sepals lanceolate to linear-oblong, subequal, 4.5-5 × 1-1.2 mm, base obtusely spurred, apex subacute. Petals free, yellow, lanceolate-spatulate, narrowed at middle, 4-4.5 × ca. 1.1 mm, apex obtuse. Stamens 10; antesepalous ones ca. 4 mm; antepetalous ones ca. 1.6 mm, inserted ca. 2 mm from petal base. Nectar scales narrowly linear, ca. 1.5 mm, apex obtuse. Carpels suberect, ca. 3.5 mm, base connate for ca. 1 mm; ovules many. Seeds obovoid, 0.3-0.4 mm, mammillate. Fl. Jul-Aug, fr. Sep-Oct.
* Thickets, rocks in Abies forests and by water, cliffs, rock crevices, pebble beaches; 2800-4100 m. NW Yunnan.