Diffusely branched, about 1° high, leaves oblong to lanceolate, racemes lax, loosely paniculate; flowers small; nutlets of the globular-pyramidal fruit only marginally glochidiate.—Iowa,

Lithospermum.—L. prostratum, 3 in., is a trailing evergreen herb, with narrow hairy leaves, and paniculate brilliant blue flowers in May and June.

Flower-heads.—Terminating the paniculate branches; large; two inches or so across; white, changing to rose or lilac; of ray-flowers only.