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

Hesperostipa curtiseta (Hitchc.) Barkworth
short-awned porcupinegrass (shortbristle needle and thread)
Poaceae (Grass family)

Introduction to Vascular Plants

© Jamie Fenneman  Email the photographer   (Photo ID #17163)

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Distribution of Hesperostipa curtiseta
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Species Information

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General:
Perennial, tufted grass from fibrous roots; stems 24-65 cm tall; lower nodes usually smooth, sometimes evenly hairy but not with lines of hairs, nodes sometimes concealed by the lower sheaths.
Leaves:
Lower sheaths smooth; blades 1.3-3 mm wide; lower ligules 0.2-1 mm long, stiff, blunt or rounded, highest at the sides; upper ligules to 3.5 mm long, blunt to rounded.
Flowers:
Inflorescence a loose, but narrow panicle, 6-24 cm long; glumes unequal, 15-30 mm long; lemmas mostly smooth, but the base and margins with brown hairs, 8.5-14 mm long, awned, the awns twice bent, 50-105 mm long, rough throughout, the tips straight; calluses 3-5 mm long.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Dry, open grassy slopes in the steppe and montane zones; frequent in SC and SE BC; N to NT, E to MB and S to SD and WY.

Source: The Illustrated Flora of British Columbia

Ecology

Ecological Framework for Hesperostipa curtiseta

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) 469 918 1210
Slope Gradient (%) 0 10 95
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
3 284 360
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
2 3 5
Modal Nutrient Regime
Class
C
Number of field plots
 species was recorded in:
141
Modal BEC Zone Class
IDF
All BEC Zones (# of stations/zone) species was recorded in: BG(33), IDF(101), PP(7)

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 curtiseta (Hitchc.) Barkworth
Stipa spartea var. curtiseta Hitchc.

Taxonomic and Nomenclatural Links

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General References