Daisy-like head

Fewer than 12 ray flowers
Ray flowers longer than 1/4 in.

Ray flowers 1/8-1/4 in. long

More than 12 ray flowers longer than 1/4 in.
Leaves more than 1/2 in. wide.

Disk flowers yellow.

Disk flowers not yellow.

Leaves less than than 1/2 in. wide.
Many stem leaves.

Few stem leaves or all leaves at the base of the plant

Ray flowers 1/8-1/4 in.long.