Dahlia is a perennial species with plant tuberous roots.
dahalia has 42 species.
bloodless winters grow once a year in balmy places. Flower forms are variable, with one head per stem; these can be as small as 5 cm (2 in) diameter or up to 30 cm (1 ft)
While a few have herbaceous stems. others have stems which lignify within the absence of secondary tissue.
it is resprout following winter dormancy. permitting in addition seasons of boom.
As a member of the Asteraceae, the dahlia has a flower head. this is genuinely a composite with each important disc florets and surrounding ray florets.
Each floret is a flower in its personal proper.