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| Leaves simple, entire, opposite or whorled, with stipules. Small flowers with tubular calyx of 4 or 8 parts; corolla with 3-5 lobes and stamens. Some with square stems. | |
| Sort by: Traits or Genus | |
| Flower Formula: Sepals 4-5; Petals (4-5) | Glossary |
| Genus (Click for Taxon List) |
WI Taxa (map link) |
Photo | Genus Traits | Google Searches |
|---|---|---|---|---|
| Cephalanthus
buttonbush |
1 |  |
Shrub with round flower heads. | Images Information |
| Diodia
button-weed |
1 |  |
Herb. Leaves opposite, not smooth. Flowers not paired, 1/8" wide. | Images Information |
| Galium
bedstraw, cleavers |
15 |  |
Herb. Leaves whorled. | Images Information |
| Houstonia
bluets |
2 |  |
Herb. Leaves opposite. Flowers not paired, 1/4" or more wide. | Images Information |
| Mitchella
|
1 |  |
Herb. Leaves opposite. Flowers paired. | Images Information |