[Cinquefoils: The Genera Comarum, Drymocallis and Potentilla in the Columbia River Gorge of Oregon and Washington]

Drummond's Cinquefoil

Potentilla drummondii

Synonym: Potentilla anomalofolia

Flower of Drummond's Cinquefoil: Potentilla drummondii ssp. drummondii (Synonym: Potentilla anomalofolia)

The photo above shows a close-up of the flower of Drummond's cinquefoil. Note the numerous stamens and pistils. Photographed in a dry meadow along a stream feeding the upper parts of Cougar Creek at the southeastern side of Mt. Adams.........May 29, 2005.

Characteristics:

Drummond's cinquefoil is an attractive perennial which forms large clumps of erect to spreading stems from 25-45 cm long. The leaves and stems are covered with numerous short hairs and the leaves always appear green (rather than gray or silvery). The basal leaves are numerous and these have long petioles with 5-11 obovate leaflets from 1.5-2.5 cm long. The margins of the leaflets are deeply toothed as seen in the photos of the leaves below. The toothed margins are cut approximately one-half of the way into the mid vein. The upper 3 leaflets often overlap as seen in the photos below. Individual leaflets range from 10-50 mm long. There are usually only two or three smaller leaves on the stem.

The inflorescence is a leafy-bracteate cyme of 10-20 flowers. The calyx consists of a shallow saucer up to 1.5 cm wide with 5 sepals. The 5 petals are bright yellow and about 5-11 mm long and obovate to obcordate in shape. The petals are slightly notched at the tips and about twice as long as the sepals.. The pistils are numerous and there are about 20 stamens.


Habitat:

Drummond's cinquefoil may be found on rocky open slopes and in wet meadows in alpine and subalpine habitats.


Range:

Drummond's cinquefoil may be found from southern British Columbia and Alberta south through the Cascades and Olympics to the Sierra Nevada of northern California. Subspecies breweri (now classified as P. breweri) is also found on the Steens Mt. of southeastern Oregon.

In the Columbia River Gorge it may be found between the elevations of 3500'-4500' on the high peaks along the southern border of the Mark Hatfield Wilderness.


Upper leaf surface of Drummond's Cinquefoil: Potentilla drummondii ssp. drummondii (Synonym: Potentilla anomalofolia) Lower leaf surface of Drummond's Cinquefoil: Potentilla drummondii ssp. drummondii (Synonym: Potentilla anomalofolia)

The photo above shows the upper leaf surface (left) and the ventral leaf surface (right) of Potentilla drummondii from Indian Mt. at the southern edge of the Mark Hatfield Wilderness.........mid July, 2001.

Upper leaf surface of Drummond's Cinquefoil: Potentilla drummondii ssp. drummondii (Synonym: Potentilla anomalofolia)

The photo above shows the upper surface of a pinnately compound basal leaf of Drummond's cinquefoil as seen in a large meadow along the Stagman Ridge Trail about one mile north of Grassy Hill on the southern slopes of Mt. Adams..........July 27, 2006. The upper leaf surface of this species is a darker, brighter green than that of the pale lower leaf surface (as seen in the next photo below).

Lower leaf surface of Drummond's Cinquefoil: Potentilla drummondii ssp. drummondii (Synonym: Potentilla anomalofolia)

The photo above shows the lower surface of a pinnately compound basal leaf of Drummond's cinquefoil as seen in a large meadow along the Stagman Ridge Trail about one mile north of Grassy Hill on the southern slopes of Mt. Adams..........July 27, 2006.

Paul Slichter