聚合草为紫草科聚合草属的多年生宿根植物。株高30～90cm,全株被向下稍弧曲的硬毛和短伏毛。根发达、主根粗壮,淡紫褐色。茎数条,直立或斜生,有分枝。基生叶具长柄,叶片带状披针形、卵状披针形至卵形,稍肉质,先端渐尖。茎中部和上部叶较小,无柄,基部下延。花冠淡紫色、紫红色至黄白色,花期5～10月。 Aggregates of grass as a comfrey genus Polygonatum perennial plants. Plant height 30 ~ 90cm, the whole plant is slightly downward curvature of the bristles and short hair. Roots developed, the main root stout, purple-brown. Stems several, erect or oblique, with branches. Basal leaves long-handled, leaf blade lanceolate, ovate-lanceolate to ovate, slightly fleshy, apex acuminate. Stems middle and upper leaves smaller, sessile, base extension. Corolla lavender, purple to yellow-white, flowering from May to October.