JUNE. 203 
PENTANDRIA. MONOGYNIA. 
COROLLIFLORZ., BORAGINACES. 
LITHOSPERMUM. (GromweELt.) 
Generic Character. Calyx in five deep segments. Corolla 
funnel-shaped. Seeds almost as hard as a stone. 
LITHOSPERMUM OFFICINALE. Common Gromwell, Grey 
Millet. These plants derive their name of Gromwell from 
two Celtic words, signifying a stone seed, from its very hard 
stone-like nut. This is a common species in dry, waste 
places, and among rubbish. It grows about a foot high, or 
more, with a branched stem; leaves broadish, rough above, 
and hairy beneath. Flowers yellow and pale. Nuts whitish- 
brown, smooth, and very much polished, as hard as a stone : 
it is said that a twentieth part of the whole seed is pure 
flint, which accounts for this peculiarity. Another species 
not uncommon. 
LITHOSPERMUM ARVENSE. Corn Gromwell, is found in 
cornfields ; the flower is white, and the nuts wrinkled. Two 
other species are rare. 
