Horkelia tridentata Torr.

Horkelia tridentata Torr. Pacif. R. R. Rep. 4 : 84. 1857
Ivesia tridentata A. Gray, Proc. Am. Acad. 7 : 338. 1868. Horkelia Tilingi Kegel, Acta Hort. Petrop. 1 : 153. 1871. Potentilla Tilingi Greene, Pittonia 1 : 105. 1887.
Perennial, with a deep taproot and short cespitose caudex ; stems several, ascending or decumbent, 2-4 dm. high, silky-villous, simple; stipules very variable, sometimes ovate and entire, sometimes finely dissected ; basal leaves numerous, grayishor whitesilky, or glabrous on the upper surface, pinnate, with 3-4 pairs of cuneate or obovate leaflets, which are generally 3-toothed at the apex (rarely 4-5-toothed), and about 1cm. in length ; stem-leaves smaller, with 1 or 2 pairs of leaflets ; cyme often somewhat branched, with sub-capitate small clusters at the end of the branches or the simple stem ; hypanthium silky-villous, cup-shaped, in fruit 3-4 -axvci. in diameter ; bractlets linear, a third to a half the length of the broadly ovate sepals, which are 1-2 mm. long; petals oblanceolate, a little longer than the sepals ; filaments all linear-lanceolate ; pistils 5-10.
Type locality : Wet ravines, Duffield's Ranch, Sierra Nevada, California. Distribution : Mountain regions of California and southern Oregon.

Horkelia tridentata (lat. Horkelia tridentata) - gülçiçəyikimilər fəsiləsinin horkelia cinsinə aid bitki növü.

Horkelia tridentata is a species of flowering plant in the rose family known by the common name threetooth horkelia. It is native to all of the mountain ranges of northern California and southern Oregon, where it grows in coniferous forest. This is a perennial herb forming tufts of erect leaves and stems. The leaves are 3 to 12 centimeters long, each made up of hairy gray-green leaflets which are tipped with usually three teeth. Unlike many other horkelias, this species is generally not strongly scented. The green or reddish stems reach a maximum length of about 40 centimeters and hold clusters of flowers. Each flower has minute bractlets beneath small, hairy, pointed sepals and narrow white petals.