The photo above shows the form of woolly-head clover (var. arcuatum) as seen in meadows lining Balloon Tree Road from the Umatilla N.F. near Tollgate in northeastern Oregon.......June 27, 2006.
Woolly-head clover is an attractive perennial found in the Pacific Northwest. It has a thick taproot with several to many stem 20-60 cm tall. The herbage is sparsely to thickly pubescent. The 3 leaflets of variety piperi are each elliptic to oblong, and somewhat rounded at the tips. They may be 2 to 7 cm long. The stipules are ovate to lanceolate, ranging from 2 to 5 cm long.
The leaflets of variety eriocephalum are elliptic-oblong to ovate and range in length from 1 to 4 cm.
The leaflets of variety cusickii are linear and sharply pointed at both ends, with serate margins. They range from 3.5 to 7.5 cm long and 2.5 to 7 mm wide.
The flower heads oval to rounded, from 2.5 to 3.0 cm wide, and borne on stems that typically exceed the height of the leaves. The flower head consists of 25-80 individual flowers which are pinkish to red. Individual flowers are 12-17 mm long and strongly reflexed or bent downward.
Woolly-head clover is a plant of dry meadows and woods.
Woolly-head clover is found on both sides of the Cascades from south-central Washington eastward to west-central Idaho and then south through Oregon to northern California and south-central Utah. Variety piperi is found in the Blue Mts of southeastern Washington south through northeastern Oregon to Harney County and eastward into adjacent Idaho.
The photo above shows the attractive flower head of woolly-head clover (var. piperi) from Balloon Tree Road in the Umatilla N.F. near Tollgate in northeastern Oregon........June 27, 2006. The corollas have a pearly luster to them. The individual flowers tend to be reflexed downwards within the flower head.
The photo above shows a close-up of a single flower of woolly-head clover. The corolla is long and tubular with the banner barely rising above the keel. The hairy calyx lobes are long and slender. Photographed along Balloon Tree Road in the Umatilla N.F. near Tollgate........June 27, 2006.
The 3 photos above show various close-up views of an attractive purplish-flowered version of woolly head clover as seen along Hat Pt. Road in forest below Horse Creek Viewpoint in the Hells Canyon National Recreation Area...........June 26, 2007.
- -The 3 photos above show additional close-up views of an attractive purplish-flowered version of woolly head clover as seen along Hat Pt. Road in a riparian area in burned forest below Saddle Creek Campground in the Hells Canyon National Recreation Area..........July 10, 2007.
- -Woollyhead clover (ssp. arcuatum) observed along Deadman Canyon Trail within the first mile or so north of the trailhead at Fish Lake Campground, Wallowa-Whitman National Forest......July 18, 2019.