Herbs, to 1.5 m tall, trailing or suberect, most parts simple-pubescent and aculeate, prickles with prominent basal tubercles, retrorsely reflexed, straight.

• 草本，达1.；5米高的是，蔓生或近直立，多数部分单的短柔毛和具皮刺，皮刺具突出基部小瘤，反折，直。