ROSE FAMILY. ROSACEAE.

Fig 101. [Tall Hairy Agrimony. Agrimonia gryposepala] Wahl. Agrimonia hirsuta (Muhl.) Bicknell.

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.

Fig 102. [Small-flowered Agrimony. Agrimonia parviflora] Ait.

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.

Fig 103. [Silvery Cinquefoil. Potentilla argentea] L.

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.

Fig 104. [One kind of Cinquefoil or Five-finger. Potentilla Canadensis] L.

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.

Fig 105. [Rough Cinquefoil. Potentilla Monspeliensis] L.

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.