Callitrichaceae, the Water Starwort Family
Small herbs growing in water or in mud, with opposite entire leaves and small inconspicuous axillary flowers, with neither calyx nor corolla. (Flowers in summer).
| 1a. Completely submerged; leaves all linear | Water Starwort, Callitriche autumnalis. |
| 1b. Submerged leaves linear, emersed and floating leaves obovate | Water Starwort, Callitriche palustris. |