Erect, suckering shrub; primocanes erect, green to purple, with rounded angles and concave to furrowed between, with numerous subsessile glands and sparsely to moderately clothed in simple hairs; armature of many, stout, ± erect or slightly falcate prickles on or near angles. Young shoots moderately to densely hairy and glandular. Leaflets (3)-5, sparsely to moderately pilose on upper surface, pilose on veins and with or without moderate tomentum between on lower surface, serrate or coarsely serrate; terminal leaflet lamina elliptic to narrow-obovate, acuminate, 35-80-(110) × 15-50-(60) mm, with petiolule ⅕-⅓ length of lamina. Stipules linear to linear-lanceolate. Infl. densely hairy, with subsessile glands. Sepals mostly acute and apiculate, moderately pilose but tomentose only on margins and within, without pricklets. Petals rounded, ± crinkled, white or sometimes pink-flushed in bud. Anthers glabrous.