Flora of North America species comparison

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Micranthes nelsoniana var. cascadensis

Micranthes nelsoniana var. carlottae
Photo is of parent taxon

Cascade saxifrage, Cascades dotted saxifrage, dotted saxifrage, Nelson's saxifrage
Photo is of parent taxon

dotted saxifrage
Leaf

blades thin, not fleshy, margins 12–18-toothed.

blades slightly fleshy, margins 9–12 toothed.
Inflorescences

somewhat lax, tangled-appressed hairy.

somewhat congested, tangled-ascending hairy.
Pistils

connate most of their lengths.

connate most of their lengths.
Capsules

3–8 mm.

6–12 mm.
2n

= 72.

Micranthes nelsoniana var. cascadensis

Micranthes nelsoniana var. carlottae
Phenology Flowering late spring–summer. Flowering summer.
Habitat Wet areas, stream banks Stream banks, wet areas
Elevation 800-2500 m (2600-8200 ft) 0-1000 m (0-3300 ft)
Distribution
from FNA
OR; WA; BC
[BONAP county map]
from FNA
BC; YT
[BONAP county map]
Discussion

Variety cascadensis has sometimes been confused with Micranthes odontoloma, probably because the petal spots of var. cascadensis fade on herbarium specimens. The more deeply toothed leaves, the compactness of the inflorescence, and the tangled inflorescence hairs clearly distinguish it from M. odontoloma. This variety is present in the Coast and Cascade ranges.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Variety carlottae is known mostly from the Queen Charlotte Islands and adjacent coastal British Columbia.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 8, p. 56. FNA vol. 8, p. 55.
Parent taxa Saxifragaceae > Micranthes > Micranthes nelsoniana Saxifragaceae > Micranthes > Micranthes nelsoniana
Sibling taxa
M. nelsoniana var. carlottae, M. nelsoniana var. insularis, M. nelsoniana var. nelsoniana, M. nelsoniana var. porsildiana
M. nelsoniana var. cascadensis, M. nelsoniana var. insularis, M. nelsoniana var. nelsoniana, M. nelsoniana var. porsildiana
Synonyms Saxifraga punctata subsp. cascadensis, Saxifraga nelsoniana subsp. cascadensis, Saxifraga punctata var. cascadensis Saxifraga punctata subsp. carlottae, Saxifraga nelsoniana subsp. carlottae
Name authority (Calder & Savile) Gornall & H. Ohba: J. Bot. Res. Inst. Texas 1: 1020. (2007) (Calder & Savile) Gornall & H. Ohba: J. Bot. Res. Inst. Texas 1: 1020. (2007)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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