Flora of North America species comparison

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Micranthes nelsoniana var. porsildiana
Photo is of parent taxon

dotted saxifrage
Leaf

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

congested, tangled-ascending hairy.
Pistils

connate to 3/4 their lengths.
Capsules

3–8 mm.
2n

= 28.

Micranthes nelsoniana var. porsildiana
Phenology Flowering summer.
Habitat Stream banks, wet areas
Elevation 0-2500 m (0-8200 ft)
Distribution
from FNA
AK; AB; BC; NT; NU; YT
Discussion

The characters used by J. A. Calder and D. B. O. Savile (1960) to separate var. porsildiana from var. pacifica overlap more significantly than do the characters that separate their subspecies, although inland populations of what has been called var. porsildiana gradually tend away from the morphology typical of coastal populations. Elven and Murray treated this taxon as a species distinct from Micranthes nelsoniana, because it apparently grows in stands mixed with other subspecies of M. nelsoniana without forming intermediates. The entire complex needs a thorough re-examination.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 8, p. 56.
Parent taxa Saxifragaceae > Micranthes > Micranthes nelsoniana
Sibling taxa
M. nelsoniana var. carlottae, M. nelsoniana var. cascadensis, M. nelsoniana var. insularis, M. nelsoniana var. nelsoniana
Synonyms Saxifraga punctata subsp. porsildiana, M. porsildiana, Saxifraga nelsoniana subsp. pacifica, Saxifraga nelsoniana var. pacifica, Saxifraga nelsoniana subsp. porsildiana, Saxifraga nelsoniana var. porsildiana, Saxifraga punctata subsp. pacifica, Saxifraga punctata var. pacifica, Saxifraga punctata var. porsildiana
Name authority (Calder & Savile) Gornall & H. Ohba: J. Bot. Res. Inst. Texas 2: 395. (2008)
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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