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A composite plant (Erigeron Canadensis), which is a common weed.

A tall weed with purplish flowers (Vernonia Noveboracensis). The name is also applied to other plants of the same genus.

The poisonous thorn apple or stramonium (Datura stramonium), a rank weed early noticed at Jamestown, Virginia. See Datura.

See Impatiens.

. See Jamestown weed. [Local, U.S.]

A tall composite plant of the genus Eupatorium (E. purpureum), with purplish flowers, and whorled leaves.

A slender, nearly leafless, American herb (Polygonum articulatum), with jointed spikes of small flowers.

taury (Centaurea nigra); -- so called from the knoblike heads of flowers. Called also bullweed.

Same as Knapweed.

See Knot.

The water pepper (Polygonum Hydropiper), an aquatic plant of Europe and North America.

A name of several maritime grasses, as the sea sand-reed (Ammophila arundinacea) which is used in Holland to bind the sand of the seacoast dikes (see Beach grass, under Beach); also, the Lygeum Spartum, a Mediterranean grass of similar habit.

A composite plant (Anthemis Cotula), having a strong odor; dog's fennel. It is a native of Europe, now common by the roadsides in the United States.

The name of several plants of the genus Spiræa, especially the white- or pink-flowered S. salicifolia, a low European and American shrub, and the herbaceous S. Ulmaria, which has fragrant white flowers in compound cymes.

Of or pertaining to Mecca, in Arabia. -- n.

The middle of the week. Also used adjectively.

rates, abounding in a milky juice, and having its seed attached to a long silky down; silkweed. The name is also applied to several other plants with a milky juice, as to several kinds of spurge.

To ween amiss; to misjudge; to distrust; to be mistaken. [Obs.] Spenser.

A slender European weed (Galium Cruciata); -- called also crossweed.

An American annual weed (veronica peregrina), with small white flowers and a roundish pod.