MINT FAMILY. LABIATAE.

Fig 155. [Dead Nettle. Lamium amplexicaule] L.

Dead Nettle. Lamium amplexicaule L. Achenes light brown, conspicuously marked by white spots some of which coalesce making the surface striped crosswise, obovate-oblong, pointed at the smaller end, 1.5–2 mm. long, the outer surface rounded, the inner face angled, the concave surfaces sloping to the edges from a central vertical ridge. Introduced from Europe. Thrives in cool weather.

Fig 156. [Motherwort. Leonurus Cardiaca] L.

Motherwort. Leonurus Cardiaca L. Achenes light brown, obovoid-oblong, rounded on one side flat on the other two sides, the truncate apex hairy, 2–2.4 mm. long. Introduced from Europe. Waste places.

Fig 157. [White Hoarhound. Marubium vulgare] L.

White Hoarhound. Marubium vulgare L. Achenes dull, varying from light to dark brown, sometimes finely roughened by numerous minute tubercles, slightly flattened, oval or obovoid, about 2 mm. long, outer surface convex, inner face angled sloping to the edges from a central vertical ridge, edges of achenes often slightly margined, surface lightly grooved. Introduced from Europe. A weed in northern Michigan where snow protects it in winter.

Fig 158. [Catnip. Catmint. Nepeta Cataria] L.

Catnip. Catmint. Nepeta Cataria L. Achenes dull, light reddish brown to nearly black, with two laterally placed cavities near the base, each filled with white spongey tissue, broadly oval, slightly flattened, 1.3–1.7 mm. long. Introduced from Europe. Scarcely a weed.

Fig 159. [Self-heal. Heal-all. Prunella vulgaris] L.

Self-heal. Heal-all. Prunella vulgaris L. Achenes light to dark brown, slightly roughened, having a diffused luster, slightly flattened, oval or oblong, the base tapering to a small whitish, triangular appendage, outer side convex having dark verticle lines, the other face sloping to the edges from a central ridge, becoming mucilaginous when soaked in water. Native to this country.