Micranthes petiolaris

(Rafinesque) Bush

Amer. Midl. Naturalist 11: 225. 1928 ,

Common names: Michaux’s saxifrage
Basionyms: Hexaphoma petiolaris Rafinesque Fl. Tellur. 2: 67. 1837
Synonyms: Saxifraga michauxii Britton Saxifraga petiolaris (Rafinesque) Bush
Treatment appears in FNA Volume 8. Treatment on page 58. Mentioned on page 49, 50, 53.
Plants solitary or tufted, with bulbils on caudices. Leaves basal; petiole somewhat flattened, 2–6 cm; blade oblanceolate, 2–12 cm, thin, basecuneate to ± attenuate, margins usually 15+-toothed (teeth large, lobelike), densely long glandular-ciliate, surfaces hairy. Inflorescences 30+-flowered, very open, lax thyrses, (flowers rarely replaced by bulbils), 10–40 cm, densely tangled, purple-tipped stipitate-glandular; (bracts leaflike, gradually reduced distally). Flowers slightly bilaterally symmetric; sepals reflexed, oblong to elliptic; petals white, 3 with 2 basal yellow spots, 2 without spots, oblanceolate to spatulate, clawed, 3–4.5 mm, longer than sepals; filaments linear, flattened; pistils connate 1/2+ their lengths; ovary superior. Capsules green to yellow, sometimes purple tinged, valvate

Phenology: Flowering late spring–early autumn.
Habitat: Wet ledges, boulderfields, and rocky slopes, usually in thin soil over rock
Elevation: 500-2100 m


V8 102-distribution-map.gif

Ga., Ky., Md., N.C., S.C., Tenn., Va., W.Va.


Micranthes petiolaris (Rafinesque) Brouillet & Gornall is an isonym.

Selected References


Lower Taxa


Facts about "Micranthes petiolaris"
AuthorLuc Brouillet + and Patrick E. Elvander† +
Authority(Rafinesque) Bush +
BasionymsHexaphoma petiolaris +
Common nameMichaux’s saxifrage +
DistributionGa. +, Ky. +, Md. +, N.C. +, S.C. +, Tenn. +, Va. + and W.Va. +
Elevation500-2100 m +
HabitatWet ledges, boulderfields, and rocky slopes, usually in thin soil over rock +
IllustrationPresent +
Illustration copyrightFlora of North America Association +
IllustratorLinny Heagy +
PhenologyFlowering late spring–early autumn. +
Publication titleAmer. Midl. Naturalist +
ReferenceNone +
Source xmlhttps://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse grained fna xml/V8/V8 102.xml +
SynonymsSaxifraga michauxii + and Saxifraga petiolaris +
Taxon familySaxifragaceae +
Taxon nameMicranthes petiolaris +
Taxon parentMicranthes +
Taxon rankspecies +
VolumeVolume 8 +