over 10″ or more
8″ to 10″ or more
6″ to 8″ across
4″ to 6″ across
up to 4″ across
up to 2″ across
AN – ANEMONE
One or more rows of flat petals surrounding a dense group of colored, elongated disc florets.
BA – BALL
Fully double flowers, ball shaped or slightly flattened at the face, the ray florets blunt, rounded or indented.
C – STRAIGHT CACTUS
Petals rolled for one-half their length, with straightor nearly straight.
CO – COLLARETTE
One row of flat or slightly cupped petals surrounding a disc. These flowers have an inner set of petaloids generally multiple and irregular forming a collar around the disc.
FD – FORMAL DECORATIVE
Flat petals with an even, regular placement throughout the flowers.
IC – INCURVED CACTUS
Petals rolled for their full length, with tips of the petals curving toward the center of the flower.
ID – INFORMAL DECORATIVE
Generally flat petals sometimes slightly rolled at the tips, but with regular arrangement of formation.
LC -LANCINATED .
The petals or ray florets are split at the tips to give an overall fringed effect.
P – POM PON
Fully double flowers almost round in shape with tightly quilled petals.
S – SINGLE
Single row of flat petals surrounding a disc.
SC – SEMI-CACTUS
Petals flat at the base, with less than half of the petals rolled or quilled.
ST – STELLAR
Decorative shaped flowers with petals being creased causing them to be narrow and involuted with a single recurve to the stem.
WL – WATERLILY
Closed center with multiple rows of ray florets normally broad and flat or slightly incurved, depth usually less than one half the diameter.
Source – The American Dahlia Society (ADS)