Nuttall's Saxifrage: Cascadia nuttallii (Synonym: Saxifraga nuttallii) -
Bald-headed Saxifrage, Tiny Swamp Saxifrage, Western Swamp Saxifrage: Micranthes apetala (Synonyms: Saxifraga apetala, Saxifraga columbiana, Saxifraga columbiana var. apetala, Saxifraga integrifolia var. apetala) -
Sierra Saxifrage: Micranthes aprica (Synonyms: Saxifraga aprica, Saxifraga laevicaulis, Saxifraga umbellulata) -
California Saxifrage: Micranthes californica (Synonyms: Saxifraga californica, Saxifraga fallax, Saxifraga gracillima, Saxifraga hallii, Saxifraga napensis, Saxifraga parvifolia, Saxifraga virginiensis var. californica) -
Alaska Saxifrage, Russethair Saxifrage, Rusty Saxifrage, Vreeland's Saxifrage: Micranthes ferruginea (Synonyms: Saxifraga ferruginea, Saxifraga ferruginea var. ferruginea, Saxifraga feruginea var. foliacea, Saxifraga ferruginea var. macounii, Saxifraga ferruginea var. vreelandii, Saxifraga vreelandii) -
Rusty Saxifrage, Russethair Saxifrage, Alaska Saxifrage: Micranthes ferruginea (Synonym: Micranthes ferruginea var. ferruginea, Saxifraga ferruginea) -
Rusty Saxifrage, Russethair Saxifrage, Alaska Saxifrage, Vreeland's Rusty Saxifrage: Micranthes ferruginea (Synonyms: Micranthes ferruginea, Saxifraga feruginea var. foliacea, Saxifraga ferruginea var. macounii, Saxifraga ferruginea var. vreelandii, Saxifraga vreelandii) -
Brittle-leaved Saxifrage, Clayton's Saxifrage, Fleshy-leaved Saxifrage, Peak Saxifrage, Swamp Saxifrage: Micranthes fragosa (Synonyms: Saxifraga claytoniifolia, Saxifraga fragosa, Saxifraga fragosa ssp. claytoniaefolia, Saxifraga fragosa ssp. claytoniifolia, Saxifraga fragosa var. fragosa, Saxifraga integrifolia var. claytoniaefolia, Saxifraga integrifolia var. claytoniifolia, Saxifraga nidifica, Saxifraga nidifica var. claytoniifolia) -
Gorman's Saxifrage: Micranthes gormanii (Synonyms: Saxifraga gormanii, Saxifraga occidentalis var. dentata, Saxifraga occidentalis var. gormannii) -
Howell's Saxifrage: Micranthes howellii (Synonym: Saxifraga howellii) -
Idaho Saxifrage: Micranthes idahoensis (Synonyms: Saxifraga idahoensis, Saxifraga marshallii ssp. idahoensis, Saxifraga marshallii var. idahoensis, Saxifraga occidentalis var. idahoensis) -
Columbian Saxifrage, Common Western Saxifrage, Swamp Saxifrage, Wholeleaf Saxifrage, Whole-leaf Saxifrage: Micranthes integrifolia (Synonyms: Saxifraga integrifolia, Saxifraga integrifolia var. integrifolia, Saxifraga laevicarpa) -
Hulten's Saxifrage, Lyall's Saxifrage, Red-stemmed Saxifrage: Micranthes lyallii (Synonyms: Saxifraga lyallii, Saxifraga lyallii ssp. hultenii, Saxifraga lyallii ssp. lyallii, Saxifraga lyallii var. hultenii, Saxifraga lyallii var. laxa) -
Marshall's Saxifrage: Saxifraga marshallii (Synonyms: Micranthes marshallii, Saxifraga hallii) -
Cascades Dotted Saxifrage, Dotted Saxifrage, Heartleaf Saxifrage, Nelson's Brook Saxifrage: Micranthes nelsoniana var. cascadensis (Synonyms: Saxifraga nesloniana ssp. cascadensis, Saxifraga punctata ssp. cascadensis, Saxifraga punctata var. cascadensis) -
Columbia Saxifrage, Nesting Saxifrage, Peak Saxifrage, Swamp Saxifrage: Micranthes nidifica (Synonyms: Micranthes plantaginea, Saxifraga columbiana, Saxifraga integrifolia var. columbiana, Saxifraga integrifolia var. leptopetala, Saxifraga montana, Saxifraga nidifica, Saxifraga nidifica var. nidifica, Saxifraga plantaginea)
Alberta Saxifrage, Mountain Saxifrage, Redwool Saxifrage, Western Mountain Saxifrage, Western Saxifrage: Micranthes occidentalis (Synonyms: Micranthes lata, Micranthes saximontana, Saxifraga occidentalis, Saxifraga occidentalis ssp. occidentalis, Saxifraga occidentalis var. allenii, Saxifraga occidentalis var. occidentalis, Saxifraga occidentalis var. wallowensis, Saxifraga reflexa ssp. occidentalis) -
Brook Saxifrage, Stream Saxifrage, Streambank Saxifrage: Micranthes odontoloma (Synonyms: Saxifraga aestivalis, Saxifraga arguta, Saxifraga odontoloma, Saxifraga punctata ssp. arguta, Saxifraga punctata var. arguta) -
Bog Saxifrage, Oregon Saxifrage: Micranthes oregana (Synonyms: Micranthes arnoglossa, Micranthes brachypus, Saxifraga hitchcockiana, Saxifraga montanensis, Saxifraga oregana, Saxifraga oregana var. montanensis, Saxifraga oregana var. oregana, Saxifraga oregana var. sierrae) -
Rusty-haired Saxifrage, Rusty-hair Saxifrage: Micranthes rufidula (Synonyms: Saxifraga aequidentata, Saxifraga klickitatensis, Saxifraga occidentalis ssp. rufidula, Saxifraga occidentalis var. aequidentata, Saxifraga occidentalis var. rufidula, Saxifraga rufidula) -
Alpine Saxifrage, Tolmie's Saxifrage, Tolmie's Alpine Saxifrage: Micranthes tolmiei (Synonyms: Saxifraga tolmiei, Saxifraga tolmiei var. ledifolia, Saxifraga tolmiei var. tolmiei) -
Wedge-leaf Saxifrage: Saxifraga adscendens (Synonyms: Muscaria adscendens, Saxifraga adscendens ssp. oregonensis, Saxifraga adscendens var. oregonensis) -
Matted Saxifrage, Spotted Saxifrage, Yellow-dot Saxifrage: Saxifraga austromontana (Synonyms: Cilaria austromontana, Saxifraga austromontana, Saxifraga bronchialis ssp. austromontana, Saxifraga bronchialis var. austromontana) -
Tufted Alpine Saxifrage, Tufted Saxifrage: Saxifraga cespitosa (Synonyms: Saxifraga caespitosa, Saxifraga caespitosa ssp. caespitosa, Saxifraga caespitosa ssp. eucaespitosa, Saxifraga caespitosa var. emarginata, Saxifraga caespitosa var. lemmonii, Saxifraga caespitosa var. minima, Saxifraga caespitosa var. subgemmifera, Saxifraga cespitosa var. subgemmifera) - The following 2 subspecies have been merged into Saxifraga cespitosa but I have left them separate here to distinguish between them.
Tufted Saxifrage, Tufted Alpine Saxifrage: Saxifraga caespitosa ssp. caespitosa (Synonyms: Saxifraga caespitosa ssp. caespitosa, Saxifraga caespitosa var. emarginata, Saxifraga caespitosa ssp. eucaespitosa, Saxifraga caespitosa var. lemmonii, Saxifraga cespitosa ssp. cespitosa, Saxifraga cespitosa var. cespitosa) -
Tufted Saxifrage, Tufted Alpine Saxifrage: Saxifraga caespitosa ssp. subgemmifera (Synonyms: Saxifraga caespitosa ssp. subgemmifera, Saxifraga caespitosa var. subgemmifera, Saxifraga cespitosa ssp. subgemmifera, Saxifraga cespitosa var. subgemmifera) -
Nodding Saxifrage: Saxifraga cernua (Synonyms: Saxifraga cernua var. exilioides, Saxifraga simulata) -
Pygmy Saxifrage, Weak Saxifrage: Saxifraga hyperborea (Synonyms: Saxifraga debilis, Saxifraga flexuosa, Saxifraga rivularis, Saxifraga rivularis ssp. hyperborea, Saxifraga rivularis var. flexuosa, Saxifraga rivularis var. hyperborea, Saxifraga rivularis var. purpurascens) -
Merten's Saxifrage, Wood Saxifrage, Woodland Saxifrage: Saxifraga mertensiana (Synonym: Saxifraga mertensiana var. eastwoodiae) -
Purple Saxifrage, Purple Mountain Saxifrage, Twinflowered Saxifrage: Saxifraga oppositifolia ssp. oppositifolia (Synonyms: Antiphylla oppositifolia, Saxifraga oppositifolia ssp. oppositifolia) -
Alpine-brook Saxifrage, Pygmy Saxifrage, Weak Saxifrage: Saxifraga rivularis (Synonyms: Saxifraga debilis, Saxifraga hyperborea ssp. debilis, Saxifraga rivularis ssp. flexuosa, Saxifraga rivularis var. debilis, Saxifraga rivularis var. flexuosa) -
Spotted Saxifrage, Yellowdot Saxifrage, Yellow-dot Saxifrage: Saxifraga vespertina (Synonyms: Ciliaria vespertina, Leptasea vespertina, Saxifraga bronchialis, Saxifraga bronchialis ssp. vespertina, Saxifraga bronchialis var. vespertina, Saxifraga vespertina) -