E-Flora BC: Electronic Atlas of the Flora of British Columbia

Hesperostipa spartea (Trin.) Barkworth
porcupinegrass
Poaceae (Grass family)

Introduction to Vascular Plants
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Distribution of Hesperostipa spartea
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Species Information

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General:
Perennial, tufted grass from fibrous roots; stems 45-140 cm tall, the lower nodes usually crossed by lines of hairs, occasionally smooth.
Leaves:
Lower sheaths with a fringe of hairs along the margins; blades flat to inrolled, 1.5-4.5 mm wide; lower ligules 0.3-3 mm long, stiff, blunt to rounded, fringed not toothed or ragged along the margins; upper ligules 3-7.5 mm long, pointed, thin and often ragged along the margins.
Flowers:
Inflorescence a panicle, 10-25 cm long, the branches ascending to erect; glumes unequal, slender, pointed, 22-45 mm long; lemmas 15-25 mm long, mostly smooth but the base and margins with brown hairs, awned, the awns bent, 90-180 mm long, the tip segments rough and straight; calluses 3.5-6 mm long.

Source: The Illustrated Flora of British Columbia

USDA Species Characteristics

Flower Colour:
Yellow
Blooming Period:
Late Spring
Fruit/Seed characteristics:
Colour: Brown
Present over the Summer
Source:  The USDA

Habitat / Range

Dry to mesic grassy slopes and open forests in the steppe and montane zones; rare in SC BC; E to ON and S to PA, OH, IN, MO, OK and NM.

Source: The Illustrated Flora of British Columbia

Ecology

Ecological Framework for Hesperostipa spartea

The table below shows the species-specific information calculated from
original data (BEC database) provided by the BC Ministry of Forests and Range.
(Updated August, 2013)

Site Information
Value / Class

Minimum

Average

Maximum

Elevation (metres) 449 885 2012
Slope Gradient (%) 0 31 68
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
100 196 285
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
1 2 5
Modal Nutrient Regime
Class
C
Number of field plots
 species was recorded in:
22
Modal BEC Zone Class
IDF
All BEC Zones (# of stations/zone) species was recorded in: BG(3), ICH(1), IDF(7), MS(1), SBS(2)

Climate

The climate type for this species, as reported in the: "British Columbia plant species codes and selected attributes. Version 6 Database" (Meidinger et al. 2008), is not evaluated, unknown or variable.

Synonyms and Alternate Names

Stipa spartea Trin.
Stipa spartea var. spartea

Taxonomic and Nomenclatural Links

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General References