Micranthes ferruginea (Grah.) Brouillet & Gornall

Spatularia ferruginea (Graham) Small
Saxifraga ferruginea Graham, Edinb. New Phil. Jour. 1828: 348. 1829. Hexaphoma ferruginea Raf. Fl. Tell. 2 : 66. 1836.
Plants 1-1.5 dm. tall, pubescent throughout with ultimately reddish hairs; leaves crowded on the short caudex, the blades spatulate to oblanceolate, 1.5-6.5 cm. long, prominently toothed near the apex or above the middle, copiously pubescent, especially beneath; scapes solitary or several together, corymbosely branched above ; bracts much smaller than the leaves ; flowers not replaced by clusters of bulblets ; sepals ovate, 1.5-2 mm. long, sparingly ciliate ; petals 3.5-4 mm. long, the 3 upper with lanceolate-cordate blades, the 2 lower with elliptic or spatulate blades ; follicles 4.5-5 mm. long, the minute style-tips spreading.
Type locality : Arctic America? First described from plants raised from seeds in the Edinburgh Botanical Garden.
Distribution : Alaska to British Columbia.

Micranthes ferruginea is a species of flowering plant known by the common names russethair saxifrage and rusty saxifrage. It is native to western North America from Alaska and northwestern Canada to northern California to Wyoming, where it can be found in moist, rocky habitat in mountainous areas. It is a perennial herb growing from a caudex and rhizome system and producing a basal rosette of leaves. Each leaf is up to 6 centimeters long, thick and fleshy with large teeth along the edges. The inflorescence arises on a slender, hairy peduncle up to 40 centimeters tall. Thin branches bear flowers and reproductive bulbils. Each flower has spade-shaped white petals, the upper ones dotted with gold.

Micranthes ferruginea là một loài thực vật có hoa trong họ Saxifragaceae. Loài này được (Graham) Brouillet & Gornall mô tả khoa học đầu tiên năm 2007.