Frequent along forest edges, fences.

Common in open prairies, roadsides, forest edges.

Frequent in open prairies.

Frequent in open prairies.

Frequent along roadsides and open prairies.

Common, erect canes with extremely strong thorns. Fence rows, old fields.

Frequent in still waters.

Infrequent along moist ditches, edges of still water.

Common in old fields and roadsides.

Common along edges of still water. Variation nitida

Hydrolea ovata. Will post a picture of the flowers when in bloom. Grows at the edge of still water. Stiff spines along stem, brilliant blue flowers.

Frequent along forest edges.

Frequent along roadsides and open prairies.

Growing in shallow water in stock pond.

Frequent in open prairies.