Flora of North America species comparison

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Swertia perennis

alpine bog swertia, also felwort, felwort, star gentian, star green gentian, star or mountain bog swertia, star swertia, swertia
Habit Herbs 0.8–6.5 dm.
Stems

usually 1 + 1–few rosettes.
Leaf

blades obtuse to subacute, not white-margined;

basal and rosette blades spatulate-obovate to elliptic, 3–22 cm × 10–32 mm;

cauline alternate, subopposite, or distal often opposite, blades elliptic-oblanceolate.
Inflorescences

narrow, open, often few-flowered.
Flowers

(4- or)5-merous;

calyx 4–8 mm;

corolla bluish white to violet-blue, sometimes with darker spots, or rarely greenish white, veins darker, 7–16 mm, lobes lanceolate-oblong, apex acute;

corona low, ± fringed ridge;

openings of foveae oval to round, rims fringed all around.
2n

 = 28.

Swertia perennis
Phenology Flowering summer–early fall.
Habitat Wet meadows, thickets, bogs, stream banks.
Elevation 0–3900 m. (0–12800 ft.)
Distribution
from FNA
AK; AZ; CA; CO; ID; MT; NM; NV; OR; UT; WA; WY; BC; restricted to high elevations southward; Eurasia
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Discussion

A specimen considered perhaps to be from the Yukon Territory is more likely from British Columbia, but Swertia perennis should be expected in the Yukon.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 14.
Parent taxa Gentianaceae > Swertia
Synonyms S. perennis var. obtusa
Name authority Linnaeus: Sp. Pl. 1: 226. (1753)
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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