Hyssop skullcap is endangered in Connecticut.
- Family: mint (Lamiaceae)
- Habitat: clearings, edges of woods
- Height: 6-24 inches
- Flower size: 3/4 inch long
- Flower color: blue
- Flowering time: May to July
- Origin: native
Hyssop skullcap can be distinguished from other skullcaps by the combination of untoothed leaves and showy flowers clustered in a terminal raceme.