Flora of North America species comparison

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Micranthes nelsoniana var. nelsoniana

Micranthes nelsoniana var. cascadensis
Photo is of parent taxon
Photo is of parent taxon

Cascade saxifrage, Cascades dotted saxifrage, dotted saxifrage, Nelson's saxifrage
Leaf

blades slightly fleshy, margins 15–21-toothed.

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

somewhat lax, tangled-appressed hairy.
Pistils

connate most of their lengths.

connate most of their lengths.
Capsules

3–8 mm.

3–8 mm.
In

-florescences usually congested, purple- or brown-tipped, erect stipitate-glandular.

2n

= ca. 80, ca. 84.

Micranthes nelsoniana var. nelsoniana

Micranthes nelsoniana var. cascadensis
Phenology Flowering summer. Flowering late spring–summer.
Habitat Arctic tundra, mountain stream banks Wet areas, stream banks
Elevation 0-1200 m (0-3900 ft) 800-2500 m (2600-8200 ft)
Distribution
from FNA
AK; NT; YT; e Asia (Russian Far East)
[BONAP county map]
from FNA
OR; WA; BC
[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.)
Source FNA vol. 8, p. 55. FNA vol. 8, p. 56.
Parent taxa Saxifragaceae > Micranthes > Micranthes nelsoniana Saxifragaceae > Micranthes > Micranthes nelsoniana
Sibling taxa
M. nelsoniana var. carlottae, M. nelsoniana var. cascadensis, M. nelsoniana var. insularis, M. nelsoniana var. porsildiana
M. nelsoniana var. carlottae, 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
Name authority unknown (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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