Composite 25 Easily the largest family. Flowers have a unique arrangement, with a central disc made up of many tiny tubular flowers, surrounded by radiating ray flowers. Either disc or ray flowers may be absent in individual species.
Buttercup 25 Flowers in the Ranunculus (Buttercup proper) genus are yellow and usually waxy. In other genera petals are highly variable and may be absent altogether. Plants are usually low, but may be climbing vines.
Aster-Like 17 Flowers of late summer and fall. Always white or some shade of blue, never yellow or red. Alternate leaves.
Dandelion-Like 17 Smaller then sunflower-like flowers. Usually no more than 2'' tall, flowers 1" or less. Often have only ray flowers.
Sunflower-Like 14 Usually at least 2 1/2'''' tall, flowers 1" or more in diameter. Always yellow, always both disc and ray flowers.
No Obvious Symmetry 13 N/A
E Miscellaneous 10 N/A
Goldenrod 10 Tiny yellow flowers in plumes, wands or flat-topped clusters. There is 1 white species (Silver rod). Bloom in the fall.
Poppy 7 Flowers are showy and have 4-14 petals and 2 sepals. Leaves are lobed and the sap is milky or colored.
Joe-Pye-Weed-Like 6 Large plants with large clusters of very small flowers. Only disc flowers present, no rays. Leaves are usually toothed and in whorls or are opposite.
Thistle-Like 6 Stems maybe prickly, but some are hairy or even smooth. Only disc flowers present, bracts prominent and often tipped with spines.
Lettuce 5 Usually tall but have very small flowers. Milky juice.
Barberry 3 Herbs or bushes. Flowers have 6 often petal-like sepals and 6-9 petals. Leaves are alternate. Family has only a few species.
Quassia 1 Local species. A tree with large, pinnately compound leaves. Seeds in clusters, are flat and surrounded by an oblong wing.
Water-Lily 1 Very showy aquatic plants with numerous sepals and petals. Floating leaves are round or heart-shaped.