VERVAIN FAMILY. VERBENACEAE.

Fig 153.[Blue Vervain. Verbena hastata] L.

Blue Vervain. Verbena hastata L. Achenes crowded, four together until mature, dull, reddish brown, flattened, oblong, 1.7–2 mm. long, bordered by a narrow margin, the outer face convex, bearing 3–5 small vertical ridges branching and uniting at the apex, forming a distinct network, the inner face sloping to the margin from a central vertical ridge; a light colored scar is seen on one side of the base. Native to this country. Not important.

Fig 154. [Nettle-leaved Vervain. Verbena urticifolia] L.

Nettle-leaved Vervain. Verbena urticifolia L. Achenes 1.6–1.8 mm. long, very closely resembling the last above mentioned. The achenes of this one are a trifle shorter and broader, more nearly oval than oblong. Native to this country. Not common in fields.