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.
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.

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

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[open faced heads]