Fig 39. [Sorrel. Sour Dock. Rumex Acetosa] L.

Sorrel. Sour Dock. Rumex Acetosa L. Calyx-wings broadly ovate or orbicular, heart-shaped 3.5–4.5 mm. long, achene shining, with 3 equal sides, broadly oval, both ends abruptly pointed, the thin edges usually lighter colored than the dark brown or black convex faces, 1.5–2 mm. long. Introduced from Europe. Not common.

Fig 40.[Sheep Sorrel. Rumex Acetosella] L.

Sheep Sorrel. Rumex Acetosella L. Achenes usually closely covered by dull reddish brown, finally roughened calyx, which is removed with difficulty; achenes shining with 3 equal sides, broadly oval, the base rounded, the apex abruptly pointed, sides convex, reddish brown or amber color, corners obtuse, darker colored. Native of this country, though in large part introduced from Europe. Very common in thin sandy meadows.

Fig 41. [Narrow-leaved or Curled Dock. Rumex crispus] L.

Narrow-leaved or Curled Dock. Rumex crispus L. Achene covered by 3 brown heart-shaped calyx-wings, which are 2.5–3.5 mm. long, each bearing an ovoid, acute tubercle; one of them is 1.5 mm. long, the other two smaller. Achene ovoid, 3-angled, shining, rich reddish-brown, 1.3–1.8 mm. long, .7–1.4 mm. wide, in transverse section the angles prominent, convex sides and angles concave near the base; base abruptly acute; when viewed vertically sides and angles concave near the apex; apex abruptly acute, compare these notes with those concerning R. obtusifolius. Introduced from Europe. Very common on low land and in meadows.