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Montana Field Guide

Montana Field Guides

Glaucous Gentian - Gentiana glauca

Species of Concern

Global Rank: G5
State Rank: S2S3
* (see State Rank Reason below)

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank: 3
C-value:

External Links






State Rank Reason (see State Rank above)
Rare in Montana, where it is has been documented only from Glacier National Park. Current population levels and trends are unknown, though it was described as locally common at the collection sites. Its high-elevation habitat is inaccessible, and there are no obvious threats. Additional sites are likely to be documented if surveys were to be conducted.
 
General Description
Glaucous Gentian is a glabrous, perennial herb. Its stems are 3-10 cm high and arise from rosettes that arise from creeping rhizomes. The fleshy rosette leaves are egg-shaped and 1-2 cm long, while stem leaves of fertile rosettes are opposite and smaller. 3-5 crowded, short-stalked flowers arise from the axils of the upper leaves, or bracts. The tubular, blue corollas are 1-2 cm long and have 5 erect lobes with unfringed plaits between the lobes on the insides. The 5-lobed calyx is ca. 4-7 mm long, and the 5 stamens are attached to the inside of the corolla tube. The fruit is a stalked, short, tubular, many-seeded capsule.

Phenology
Flowering in late July-early August.

Diagnostic Characteristics
Gentiana prostrata has creeping stems but bears only one flower per stem. Gentiana calycosa has flowers greater than 2 cm long. Gentianella propinqua has a slender taproot.

Species Range
Present
 


Range Comments
AK south to WA and nw. MT. Peripheral.

Summary of Observations Submitted for Montana
Number of Observations: 3

(Click on the following maps and charts to see full sized version) Map Help and Descriptions
Relative Density

Recency

 

(Observations spanning multiple months or years are excluded from time charts)



Habitat
Wet, boggy tundra in the alpine zone.

Ecological Systems Associated with this Species

References
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Citation for data on this website:
Glaucous Gentian — Gentiana glauca.  Montana Field Guide.  .  Retrieved on , from