Hare's Ear. Conringia orientalis (L.) Dumort. Seeds brown, surface checked off into minute irregular pits or patches; broad oval, 2–2.5 mm. long, in section nearly circular, except two opposite slight grooves near one side. Cotyledons incumbent. Introduced, not common.

Fig 89. [Sand Rocket. Diplotaxis muralis] (L.) DC.

Sand Rocket. Diplotaxis muralis (L.) DC. Flowers yellow, seeds reddish yellow or reddish brown, broad oval, somewhat flattened. Mucilaginous when wet. Introduced from Europe. A vigorous weed.

Fig 90.[Worm-seed or Treacle Mustard. Erysimum cheiranthoides] L.

Worm-seed or Treacle Mustard. Erysimum cheiranthoides L. Flowers yellow; seeds reddish yellow, smooth, dull, about 1.2 mm. long, ovoid or oval, more or less flattened, varying much in shape; some of them acute, rhombic or triangular, becoming mucilaginous when wet. Probably introduced from Europe. If not already in some portions of the state, we may at any time expect to find three other species of Erysimum. A vigorous and prominent weed.