The umbelliferous plant Laserpitium Siler. (Cf. hartwort, n.)

The stalk of the plant silphium, source of the gum resin laser; the plant itself.

any of several plants of the genus Laserpitium (family Apiaceae).

an umbelliferous plant native to mountainous areas of central and southern Europe, Siler montanum.

any plant of the genus Laserpitium, esp. L. latifolium.

With qualification, applied to various species of willow; also to other plants, as the laserwort, Laserpitium Siler: see quots.