大丽花的块根由茎基部原基发生的不定根膨大而形成,肥大部分无芽,不会抽生不定芽,仅在根颈部分发生新芽,生长发育成新的个体。种子繁殖时一般舌状花呈中性或雌性,常不结实,筒 Dahlia root tuberosity stems from the roots of adventitious roots inflated and formed, the majority of hypertrophy without buds, adventitious buds will not bud only in the root part of the neck sprout, growth and development into a new individual. When the seeds are generally breeding tongue-shaped flowers were neutral or female, often not strong, tube