Checklist » Saxifragaceae
Saxifragaceae[FNA8, HC, HC2](Saxifrage Family)
Synonyms:
(none)

Notes: FNA8: "Classification of Saxifragaceae has been varied and controversial (e.g., A. Cronquist 1981; H. G. A. Engler 1930; J. Hutchinson 1973; G. K. W. Schulze-Menz 1964b; A. L. Takhtajan 1997; R. F. Thorne 1992). Molecular phylogenetic data (D. R. Morgan and D. E. Soltis 1993; Soltis et al. 1993, 2001; Angiosperm Phylogeny Group 1998, 2003) reveal that genera of Saxifragaceae in the broad sense are allied with at least ten separate, often distantly related families of flowering plants. These data also suggest that Saxifragaceae in the narrow sense as treated here consists of about 38 genera worldwide, equivalent to subfamily Saxifragoideae, one of the 15 subfamilies recognized by Engler and one of the 17 recognized by Schulze-Menz of the broadly defined Saxifragaceae. Molecular phylogenetic data (Soltis et al. 2001) show that the narrowly defined Saxifragaceae fall into two major groups: Saxifraga, and the heucheroid clade encompassing all other genera. Molecular data further show that Saxifraga, as traditionally understood, is polyphyletic, comprising two distinct lineages (treated here as Saxifraga and Micranthes) and the monospecific North American Cascadia. The major split between Saxifraga and the heucheroid clade is supported not only by molecular data from six DNA regions but by differences in patterns of floral morphology. Saxifraga has a relatively uniform floral morphology (radially symmetric flowers, with bilateral symmetry restricted to one Asian group of species, which consistently have the same number of sepals, petals, stamens, and carpels). Almost all of the variation in the family in numbers of sepals, petals, stamens, and carpels occurs in the heucheroid clade. Radially symmetric flowers predominate there, but some bilateral flowers are found in Bensoniella, Micranthes, Tolmiea, and some species of Heuchera."

NOTE: Past and contemporary research have indicated that Mitella is a polyphyletic group best treated as multiple genera. The treatment here reflects that view, which is also consistent with how these taxa were treated by Abrams in "Illustrated Flora of the Pacific States".

FNA8: "Mitella is treated here in the broad sense; phylogenetic data indicate that it is polyphyletic (D. E. Soltis et al. 1990; Soltis and R. K. Kuzoff 1995). Historically, four or five genera have been recognized (including Mitella, Ozomelis Rafinesque, Pectiantia Rafinesque). Formal restructuring of generic boundaries is complicated by the presence of nearly a dozen Asian species (M. Wakabayashi 2001) and lack of a comprehensive understanding of the genus relative to the rest of Saxifragaceae. Mitella nuda and M. diphylla, both with ten stamens, form a clade that would comprise a narrowly defined Mitella. A second clade composed of M. diversifolia, M. stauropetala, M. trifida, and Conimitella williamsii would form a second, distinct genus. Molecular data suggest that M. breweri, M. caulescens, and M. pentandra also form a distinct clade and perhaps a third, distinct genus. The relationships of M. ovalis are less certain; some analyses suggest that it may be sister to the genus Tolmiea (Soltis and Kuzoff; Kuzoff and Soltis, unpubl.)."

dalaman transfers

References:

(none)

Family information last updated 10/21/2017 by David Giblin.

Taxon (native taxa in boldface)
Common Names
# Synonyms
northern false coolwort
1 synonym
greater boykinia, Sierran brookfoam
2 synonyms
coastal brookfoam
4 synonyms
Nuttall's saxifrage
1 synonym
Pacific golden-saxifrage, Pacific watercarpet
3 synonyms
northern golden-saxifrage
2 synonyms
Elmera
1 synonym
fuzzy elmera
0 synonyms
var. racemosa[HC, HC2]
common elmera
0 synonyms
buttercup-leaf mock brookfoam
3 synonyms
green-flowered alumroot, meadow alumroot, tall alumroot
0 synonyms
poker alum-root, lava alumroot, roundleaf alumroot
13 synonyms
alpine alumroot, smooth alumroot
0 synonyms
gooseberry-leaved alumroot
0 synonyms
gooseberry-leaved alumroot
0 synonyms
smallflower alumroot
0 synonyms
small-flowered alumroot
2 synonyms
var. micrantha[FNA8, HC, HC2]
small-flowered alumroot
0 synonyms
pearleaf, leatherleaf saxifrage
3 synonyms
bulbiferous prairie star, bulbous woodlandstar
7 synonyms
small-flowered prairie star
3 synonyms
slender woodlandstar
9 synonyms
Tiny swamp saxifrage, western swamp saxifrage
3 synonyms
rusty saxifrage
6 synonyms
Clayton's saxifrage
5 synonyms
Gorman's saxifrage
2 synonyms
Idaho saxifrage
4 synonyms
Columbian saxifrage, swamp saxifrage, Whole-leaf saxifrage
3 synonyms
Lyall's saxifrage, red-stemmed saxifrage
5 synonyms
dotted saxifrage, Nelson's saxifrage
1 synonym
dotted saxifrage, Nelson's saxifrage
3 synonyms
Columbia saxifrage, swamp saxifrage
7 synonyms
mountain saxifrage, redwool saxifrage, western saxifrage
7 synonyms
brook saxifrage, streambank saxifrage
5 synonyms
bog saxifrage, Oregon saxifrage
7 synonyms
rusty-hair saxifrage
7 synonyms
Olympic saxifrage
1 synonym
alpine saxifrage, Tolmie's alpine saxifrage, Tolmie's saxifrage
3 synonyms
Mitella nuda L.[FNA8, HC, HC2]
bare-stemmed mitrewort
1 synonym
leafy mitrewort, star-shaped mitrewort
1 synonym
angle-leaf bishop's-cap
1 synonym
cross-shaped mitrewort, side-flowered mitrewort
2 synonyms
three-toothed mitrewort
6 synonyms
feathery bishop's-cap, Brewer's mitrewort
1 synonym
coastal bishop's cap, coastal mitrewort
1 synonym
five-stamen bishop's-cap, alpine mitrewort
1 synonym
wedge-leaf saxifrage, wedge-leaved saxifrage
3 synonyms
matted saxifrage, spotted saxifrage
3 synonyms
Saxifraga cernua L.[FNA8, HC, HC2]
nodding saxifrage
2 synonyms
tufted alpine saxifrage, tufted saxifrage
8 synonyms
pygmy saxifrage
7 synonyms
Merten's saxifrage, woodland saxifrage
1 synonym
purple saxifrage, twinflowered saxifrage
1 synonym
purple mountain saxifrage, purple saxifrage, twinflowered saxifrage
0 synonyms
rue-leaved saxifrage
0 synonyms
matted saxifrage, spotted saxifrage
4 synonyms
strawberry saxifrage
1 synonym
violet mock brookfoam
0 synonyms
Oregon coolwort
0 synonyms
fragrant fringecup
2 synonyms
Tiarella trifoliata L.[FNA8, HC, HC2]
 
0 synonyms
cut-leaved foamflower
2 synonyms
var. trifoliata[FNA8, HC, HC2]
three-leaf foamflower
0 synonyms
simple-leaved foamflower
2 synonyms
piggyback-plant
1 synonym