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Montana Field Guide

Montana Field Guides

Plains Rough Fescue - Festuca hallii

Status Under Review

Global Rank: G4G5
State Rank: SNR

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

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General Description
Cespitose perennials, mostly 25-85 cm tall. Culms sometimes scabrous near top. Leaf sheaths closed for less a third of their length, collars glabrous; ligules 0.3-0.6 mm long; blades usually conduplicate, less than 1.2 mm in diameter, or more rarely flat and up to 2.5 mmwide, grayish-green, surfaces scabrous (or puberulent below). Inflorescences 6-16 cm long, more or less contracted; branches 1-2(3) per node, stiffly spreading (typically when flowering) to erect, spikelets borne towards tips. Spikelets 6.5-9.5 mm long; florets 2-3(4). Glumes about equal to or slightly exceeding upper florets. Lower glumes 5-8(-9.5) mm long; upper glumes 6.2-8.5(-9.5) mm long; lemmas 5.5-8(-9) mm long, awnless or with awns to 1.3 mm long; anthers 4-6 mm long; ovary apex sparsely pubescent (adapted from: Darbyshire & Pavlick, 2007, Flora of N. America, Vol. 24).

Lavin (2012) includes this species in synonymy of Festuca campestris.

Species Range
Present
 


Range Comments
BC east to SK, south to OR, northern ID and western half of MT; disjunct in a few counties in southern CO (Kartesz in prep. 2012).

Summary of Observations Submitted for Montana
Number of Observations: 1

(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
Grasslands of northern Great Plains, but alpine meadows in southern CO (Darbyshire & Pavlick, 2007, Flora of N. America, Vol. 24).

References
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Citation for data on this website:
Plains Rough Fescue — Festuca hallii.  Montana Field Guide.  .  Retrieved on , from