Kentucky Nature Preserves Rare Plants

Kentucky State Nature Preserves Commission

Michaux's Saxifrage
Saxifraga michauxii
Family: Saxifragaceae

Protection Status:
State Status:  T
USFWS Status: {null}

Global Rank: G4G5
State Rank: S2

Moist or wet ledges and rocky woods in the mountains (Gleason & Cronquist 1991).

Species Description:
Perennial herb.

Flowering Period: Early June to late October.

Additional Information at NatureServe

Diagnostic Characteristics:
Small erect plants with basal leaves coarsely serrate (fewer than 10 teeth on each side) and narrowed to a winged petiole. Bracteal leaves (those associated with the inflorescence) similar to basal leaves but smaller. Numerous small flowers in panicles and with bracts at the base of each branch in the panicle. Flowers with 5 petals, 3 large and clawed, the ovate blade yellow-spotted and auriculate. Calyx lobes are reflexed. Ovaries are superior (the calyx attached at the base of the ovary).

The habitat for this species is especially sensitive to changes in hydrology and not likely to withstand much alteration. Grazing or browsing pressure, vegetation removal, hydrologic changes (i.e. stream alterations road construction) would be detrimental.

Global Range:

Known Kentucky Occurrences:

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Data last updated: Wednesday, May 28, 2014
Kentucky State Nature Preserves Commission
801 Teton Trail
Frankfort,KY 40601
Phone: (502) 573-2886
Fax: (502) 573-2355
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