mpressed, 6-7 mm. long. This mossy little plant is persistent when
once established in sandy soil. Introduced from Europe.

ROSE FAMILY. ROSACEAE.

[Illustration: Fig. 101.]

=Tall Hairy Agrimony.= _Agrimonia gryposepala_ Wahl. _Agrimonia hirsuta_
(Muhl.) Bicknell. Flowers yellow. Bur, consisting of calyx and two
included fruits inside of which are two seeds; lower part of bur,
top-shaped, rough, grooved, above which are numerous hooked prickles in
several rows, the whole 7-10 mm. long. Native of woods in this country;
seeds mottled brown, flat on one side, 2.5 by 2.5 mm. not found mixed
with grass seed. Several other species are nearly as troublesome as this
one. Seldom found out of the woods.

[Illustration: Fig. 102.]

=Small-flowered Agrimony.= _Agrimonia parviflora_ Ait. Flowers yellow;
fruit 5-6 mm. long and nearly as wide including the hooked bristles;
bristles few, erect or spreading, scarcely any recurved; seeds light
brown, broad oval, 2.7 by 2.5 mm. with a rounded point at the base more
pronounced than in the former species. Shady places.

[Illustration: Fig. 103.]

=Silvery Cinquefoil.= _Potentilla argentea_ L. Flowers yellow, achenes
dull white to brown, unsymmetrically ovoid or short kidney-shaped,
slightly flattened, 0.5-0.7 mm. long, smooth or marked by a few
longitudinal curved ridges, some of them forked. Introduced into
Michigan from Europe or possibly from the eastern states. Thrives in
sandy land.

[Illustration: Fig. 104.]

=One kind of Cinquefoil or Five-finger.= _Potentilla Canadensis_ L.
Achene unsymmetrically ovoid, light straw-color to brown, ridges
indistinct, short, wavy, branched and broken up, (these ridges are
different from those of P. argentea or P. monspeliensis) 1 mm. long, the
achene is less flattened and narrower in proportion. Native from Me. to
Ga. Miss.

[Illustration: Fig. 105.]

=Rough Cinquefoil.= _Potentilla Monspeliensis_ L. Flowers yellow;
achenes nearly white to light brown, unsymmetrically ovoid, or short
kidney-shaped, slightly flattened, 1 mm. or less in length, clearly
marked by a few longitudinal curved ridges, the longer ones forked.
Indigenous to Michigan, thriving on moist or wet land.

PULSE FAMILY. LEGUMINOSAE.

[Illustration: Fig. 106.]

=Ax Seed. Ax Wort.= _Coronilla scoparioides_ Koch. Seed reddish brown,
oblong, slightly flattened and curved, 4-5 mm. long, 1.5 mm. wide, with
a circular scar in a depression on the middle of one edge, and