(Endotropis lanceolata glabrata)
Lanced-leaved Buckthorn (Rhamnus lanceolata var. glabrata), a Wisconsin Special Concern plant, is found in dry to moist, brushy thickets with dolomite near the surface, often just below cliffs. Blooming occurs late May through late June; fruiting occurs early July through late August. The optimal identification period for this species is late May through late August.