Canon SX40 HS
Photographed near small pond in Ft. Mitchel, Ky. USA
Potentilla recta is a perennial herb of the rose family (Rosaceae). Potentilla recta has a woody base with 1-8 stems, reaching 30-70 cm in height. Stems have few, if any branches. Leaves are alternate, palmately compound with 5-9 leaflets per leaf. Leaflets are serrate, oblong and 3-14 cm long (Werner and Soule 1976). The entire above-ground portion of the plant is covered with shiny, erect hairs that emerge at right angles from the plant. Plants have been reported to live up to 20-30 years in Michigan (Rice 1991) and 10 years in Oregon (Dana Perkins, pers. comm.). The plant has a single taproot, and may have several shallow, spreading branch roots, but no rhizomes. Flowers typically appear from late May to mid July in Oregon, and occur in cymes with 1-60 flowers per inflorescence (Endress, unpublished data). Flowers have 5 pale-yellow petals that are notched at the tip and are 1.5-2.5 cm in length (Rice 1999). Reproduction is only by seed. The seeds are dark brown comma-shaped achenes, 1-2 mm long with a net-like pattern of veins on the surface. Potentilla recta is often confused with native cinquefoils that are found in the Pacific Northwest, but can be easily distinguished by its 3 unique characteristics: 1) long, right angled hairs perpendicular to the leafstalks and stem, 2) numerous stem leaves but few basal leaves, and 3) a net-like pattern on its seed coat.
Copied from: http://wiki.bugwood.org/Potentilla_recta