Description from Flora of China
Smilax stans Maximowicz var. verruculosifolia J. M. Xu.
Shrubs deciduous, erect, unarmed. Stem and branches terete, indistinctly striate-ridged. Petiole 5--10 mm, widened toward base, abaxially striate-ridged, adaxially channeled, papillose-puberulent in distal 1/2, narrowly winged for ca. 2/3 its length; wings apically confluent to petiole; abscission zone apical; tendrils absent. Leaf blade ovate or broadly so, 2--4 × 1--3 cm, papery, abaxially papillose-puberulent on basal veins. Inflorescence of 1 umbel, basally not prophyllate. Flowers very similar to those of Smilax stans. Berries black, globose, 5--7 mm in diam. Fl. May--Jun, fr. Oct.
* Forests, thickets, shaded places on slopes; 1300--3100 m. Gansu, Henan, Hubei, Shaanxi, Sichuan.