m. 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.

[Illustration: Fig. 42.]

=Broad-leaved or Bitter Dock.= _Rumex obtusifolius_ L. Achene covered by
three brown, hastate-deltoid calyx-wings, which are about 4 mm. long,
each bearing an ovoid-elliptical tubercle, one of them 1.5 mm. long,
the other two very narrow, rudimentary. Achenes ovoid, 3-angled, less
polished than those of R. crispus, light brown, 2-2.4 mm. long, 1-1.4
mm. wide, angles in transverse section slight, sides convex, usually in
a greater degree than in the specie just named, vertically sides and
angles very slightly concave or straight near the base which is abruptly
acute; sides and angles near the apex scarcely concave or straight; apex
acute. Introduced from Europe. Not very common.

[Illustration: Fig. 43.]

=Patience Dock.= _Rumex Patientia_ L. Calyx-wings circular-heart shaped,
4-6 mm. long, one of them bearing a prominent ovoid tubercle; achene
ovoid-elliptical, 3-angled, somewhat polished, shining, light-brown,
2.5-3.5 mm. long, 1.7-2 mm. wide, angles prominent, sides straight, in
transverse section, not counting the angles, base rounded, not counting
the abrupt point, when seen vertically, the sides near the apex are
straight or slightly concave. Introduced from Europe. Not common.

[Illustration: Fig. 44.]

=Willow-leaved Dock.= _Rumex Mexicanus_ Meisn. _Rumex salicifolius_
Weinm. Calyx-wings triangular-ovate, about 3 mm. long, each bearing a
large tubercle; achene dark reddish brown, smooth, shining, 1.8-2.2 mm.
long, ovoid, angles prominent, the sides viewed transversely rounded,
the sides of the base as viewed vertically, rounded, straight or
slightly concave, near the apex straight or concave. A native of
Northeastern North America. Not common.

GOOSEFOOT OR PIGWEED FAMILY. CHENOPODIACEAE.

[Illustration: Fig. 45.]

=Spreading Orache.= _Atriplex patula_ L. Seeds are likely to occur in
either of three different guises, depending upon the degree of their
ripeness or the amount of threshing to which they have been subjected.

Achenes thin, dull,