[Saxifrages of the Cascade Mountains of Oregon and Washington]

Spotted Saxifrage, Yellowdot Saxifrage, Yellow-dot Saxifrage

Saxifraga bronchialis ssp. vespertina

Synonyms: Ciliaria vespertina, Saxifraga bronchialis var. vespertina, Saxifraga vespertina

Flowers of Yellowdot Saxifrage, Yellow-dot Saxifrage: Saxifraga bronchialis ssp. vespertina (Synonyms: Ciliaria vespertina, Saxifraga bronchialis var. vespertina, Saxifraga vespertina)

The photo above show close-ups of spotted saxifrage (variety vespertina) as seen on the Elowah Falls Trail in the Columbia River Gorge...........May 21, 2005. Note the numerous minute, yellow spots on the upper surface of each petal.

Leaves of Yellowdot Saxifrage, Yellow-dot Saxifrage: Saxifraga bronchialis ssp. vespertina (Synonyms: Ciliaria vespertina, Saxifraga bronchialis var. vespertina, Saxifraga vespertina)The photo at right shows the leaf of spotted saxifrage, var. vespertina, from the mouth of Oneonta Gorge in the Columbia River Gorge..........mid May 2004. Note that the leaves of this variety are broader and distinctly ciliate-margined. The flowers of this plant lacked the spots typical of this species. The photos below were taken at the same location.
Characteristics:

Spotted saxifrage is an attractive, tufted, cushion forming perennial. The stems creep and root at the nodes, and are freely branched, forming mats up to 15 cm wide. The leaves are rigid and closely crowded together, giving the plant a moss-like appearance. The leaves are linear-lanceolate to lanceolate, 5-15 mm long and 1.5-3 mm wide, and persist for many years. The surface of the leaves are usually glabrous while the margins are fringed with tiny hairs from their base to near the tip. The flowering stems range from 5-13 cm high with several smaller, sessile and spiny leaves on the stems from 2-6 mm long. The upper stem is generally glandular-hairy. As the cushion expands outward, the inner portion often dies, creating separate clones.

The inflorescence is a flat-topped cluster of 2-10 flowers. The 5 petals are white, 3.5-6.5 mm long and 1.5-2.5 mm wide, with distinctive red or purple dots above the middle, and yellow-orange spots near the base. The petals are oblong to oblong-oval in shape. The calyx is saucer-shaped with the lobes or sepals triangular to oval in shape, spreading, and from 1.5-2.5 mm long. The 10 stamens are shorter than the petals with the thin filaments 4-5 mm long. The ovary is only inferior at its base


Varieties:

Variety austromontana - The leaves are narrowly lanceolate to linear with pointed tips. They are usually over 4 times as long as wide. Found from British Columbia south through the Cascades to Mt. Rainier and east to the Rocky Mts. where it may be found south to New Mexico. Within the Pacific Northwest, it may also be found in northeastern Oregon.

Variety vespertina - The leaves are oblong or spatulate, or occasionally 3-lobed at the tip. The leaves are not more than 4 times as long as broad. The leaf tips are blunt to obtuse. Found in the Columbia River Gorge, in the Cascades from Mt. Rainier south into Oregon, on Mt. Baldy in the Olympic Mts and at Saddle Mt. in the Coast Range of Oregon.


Habitat:

Spotted saxifrage may be found in moist, shaded rock crevices, on cliffs, rock slides and alpine scree.


Range:

Spotted saxifrage may be found from Alaska south through the Cascade and Olympic Mts to northern Oregon, and in the Blue and Wallowa Mts. of southeastern Washington and northeastern Oregon. It may be found eastward to Greenland, and south of the Arctic, it may be found south through the Rocky Mts. to New Mexico.


Side view of the flower of Yellowdot Saxifrage, Yellow-dot Saxifrage: Saxifraga bronchialis ssp. vespertina (Synonyms: Ciliaria vespertina, Saxifraga bronchialis var. vespertina, Saxifraga vespertina)

The photo above show close-ups of spotted saxifrage (variety vespertina) as seen on the Elowah Falls Trail in the Columbia River Gorge...........May 21, 2005. Notice the numerous yellow spots on the inner surface of the petals and numerous gland-tipped hairs on the stalks below the flowers.

Spotted Saxifrage, Yellowdot Saxifrage, Yellow-dot Saxifrage: Saxifraga bronchialis ssp. vespertina (Synonyms: Ciliaria vespertina, Saxifraga bronchialis var. vespertina, Saxifraga vespertina)

Clusters of leaves of spotted saxifrage (variety vespertina) as seen at the summit of High Rock, northern Gifford Pinchot National Forest........July 2, 2015.

Paul Slichter