▁names ▁tall ▁flat - to pped ▁white ▁a ster , ▁par as ol ▁wh itet op , ▁or ▁tall ▁white - aster , ▁is ▁a ▁North ▁American ▁plant ▁species ▁in ▁the ▁a ster ▁family . ▁It ▁is ▁native ▁to ▁Canada ▁( from ▁Al berta ▁to ▁New found land ), ▁St . ▁Pierre ▁and ▁Mi quel on , ▁and ▁the ▁eastern ▁and ▁north - central ▁United ▁States ▁( from ▁Neb r aska ▁and ▁the ▁Dak ot as ▁east ▁to ▁Maine ▁and ▁South ▁to ▁Mississippi , ▁Georgia ▁and ▁the ▁Florida ▁Pan handle . ▁ ▁Do ell inger ia ▁um bell ata ▁is ▁a ▁per enn ial ▁up ▁to ▁ 2 0 0   cm ▁( 8 0 ▁inches ) ▁tall , ▁spread ing ▁by ▁means ▁of ▁under ground ▁rh iz om es . ▁It ▁can ▁sometimes ▁produce ▁as ▁many ▁as ▁ 3 0 0 ▁small ▁flower ▁heads , ▁each ▁with ▁as ▁many ▁as ▁ 1 6 ▁white ▁ray ▁flor ets ▁and ▁ 5 0 ▁yellow ▁disc ▁flor ets . ▁ ▁Vari eties ▁This ▁per enn ial ▁grows ▁in ▁full ▁sun ▁or ▁part - sh ade ▁and ▁mo ist ▁or ▁dra ining ▁wet ▁so ils ▁that ▁are ▁best ▁slightly ▁acid ▁in ▁reaction , ▁but ▁adapt s ▁to ▁moder ately ▁acid ▁or ▁slightly ▁al kal ine ▁reaction . ▁ ▁Do ell inger ia ▁um bell ata ▁var . ▁pub ens ▁( A . G ray ) ▁Brit ton ▁- ▁Al berta , ▁Man it oba , ▁Ontario , ▁Québec , ▁S ask atch ew an , ▁Illinois