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.