Potentilla biennis Greene

Potentilla biennis Greene, Fl. Fran. 1 : 65. 1891
Potentilla millegrana S. Wats. Bot. King's Expl. 85, in part. 1871. Not P. millegrana Engelm.
1849. Potentilla lateriflora Rydb. Bull. Torrey Club 23 : 261. 1896.
Potentilla millegrana lateriflora Engelm.; Rydb. Bull. Torrey Club 23 : 261, as synonym. 1896. Tridophyllum bienne Greene, Leaflets 1 : 189. 1905.
Annual or biennial ; stems often several from the root, 3-5 dm. high, terete, finely and rather densely pubescent and more or less glandular, often tinged with red or purple, simpler than in related species and with, erect branches ; stipules small, ovate or oblong, entire or toothed ; leaves all ternate, the lower with petioles 2-10 cm. long, more or less hairy ; leaflets broadly obovate, coarsely crenate, 2-4 cm. long and 1-3 cm. wide, the teeth often mucronulate ; flowers small, about 5 mm. in diameter, on pedicels 5-15 mm. long from the axils of upper leaves, making the branches finally resemble leafy racemes ; hypanthium glandular-pubescent, in fruit about 5 mm. in diameter ; bractlets ovate-lanceolate or oblong, acute, a little shorter 'than the ovate-acute sepals ; petals yellow, obovate-cuneate, sometimes slightly emarginate, much shorter than the sepals ; stamens about 10 ; pistils very numerous; styles terminal, thickened and glandular at the base ; ripe achenes whitish, smooth.
Type locality : Butte County, California.
Distribution : British Columbia to Saskatchewan, Colorado, Arizona, and Lower California.

Potentilla biennis (lat. Potentilla biennis) - gülçiçəyikimilər fəsiləsinin qaytarma cinsinə aid bitki növü.

Potentilla biennis is a species of cinquefoil known by the common names biennial cinquefoil and Greene's cinquefoil. It is native to western North America from northwestern Canada to the southwestern United States, where it grows in moist habitat. This is an annual or biennial herb producing an erect stem up to 70 centimeters tall from a taproot. It is hairy and glandular in texture. The hairy leaves are each divided into three toothed, oval leaflets each up to 3 centimeters long. The inflorescence is a cyme of several flowers. Each flower has five oval yellow petals 1 or 2 millimeters long and five triangular sepals which are slightly longer. The fruit is a minute whitish achene.

Potentilla biennis adalah spesies tumbuhan yang tergolong ke dalam famili Rosaceae. Spesies ini juga merupakan bagian dari ordo Rosales. Spesies Potentilla biennis sendiri merupakan bagian dari genus Potentilla. Nama ilmiah dari spesies ini pertama kali diterbitkan oleh Greene.