Panarctic Flora


361202 Ranunculus camissonis Schltdl.


West Chukotka: Scattered
East Chukotka: Scattered
Western Alaska: Rare
Northern Alaska - Yukon: Rare
Mid Arctic Tundra: Rare
Southern Arcti Tundra: Scattered
Shrub Tundra: Scattered
Bordering boreal or alpine areas: Rare


2n= 16 (2x). - Far East (N). - At least four reports.

Geography: Amphi-Beringian: RFE ALA.

Notes: Murray and Elven: As pointed out by Whittemore (1997), whereas the usual spelling is "chamissonis", "camissonis" is the original spelling and is admissible according to the Code.

We consider Ranunculus camissonis a species well apart from R. glacialis (both subspecies). It is sympatric with the Beringian subspecies of R. glacialis but without any sign of transitions. Several morphological differences vs. R. glacialis are found, e.g.: uniformly with only one erect stem vs. mostly multiple and mostly ascending stems in R. glacialis; leaves more erect vs. patent to ascending; main blade segments without distinct petiolules vs. petiolulate; blade little divided with lobes few, linear to sublinear, distant, and often ascending vs. much divided with lobes numerous, broad, approximate and flat; and flowers smaller and with darker red honey leaves. Whereas R. camissonis is a plant of grassy turf, seepage, and damp tundra on basic substrates, R. glacialis (in both its races) is a plant of gravel, scree, and snowbank environments, in open vegetation, and mainly on acidic substrates.

Higher Taxa