Oryzopsis asperifolia Michx.
rough-leaved ricegrass (roughleaf ricegrass)
Poaceae (Grass family)

Introduction to Vascular Plants

Photograph

© Adolf Ceska     (Photo ID #5726)


Map

E-Flora BC Static Map

Distribution of Oryzopsis asperifolia
Click here to view the full interactive map and legend

Species Information

General:
Perennial, tufted grass from fibrous roots; stems hollow, often equalled or exceeded by the erect, stiff blades of the offsets at the stem bases, 20-50 cm tall.
Leaves:
Sheaths open; blades of the stems usually greatly reduced or lacking, erect, flat or slightly in-rolled, strongly rough, tapering strongly at each end, 3-7 mm wide; ligules more or less fringed with fine hairs, blunt, usually higher on the sides than at the back, about 0.5 mm long.
Flowers:
Inflorescence often a nearly simple raceme with all the flowers and branches more or less to one side, 4-8 cm long; glumes broad, about 7 mm long, nearly equal, 7-nerved, the margins more or less jagged, abruptly narrowed to sharp-pointed tips; lemmas appressed-hairy, about equalling the glumes, stoutly awned from the tips, the awns 5-10 mm long, once bent, strongly crisp-hairy on the upper parts of the calluses; paleas about equal to the lemmas; lodicules 2, lanceolate, faintly 2-nerved, about 5 mm long; anthers about 3.5 mm long, the tips tufted with stiff hairs.

SourceThe Illustrated Flora of British Columbia

Illustration

If more than one illustration is available for a species (e.g., separate illustrations were provided for two subspecies) then links to the separate images will be provided below. Note that individual subspecies or varietal illustrations are not always available.

Ecology

Ecological Framework for Oryzopsis asperifolia

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

Avg

Min

Max

Elevation (metres)
899 6 2125
Slope Gradient (%)
16 0 220

Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]

197 0 360
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
3 0 7
Modal Nutrient Regime
Class
C
# of field plots
 species was recorded in:
2020
Modal BEC Zone Class
SBS

All BEC Zones (# of stations/zone) species was recorded in

BG(1), BWBS(63), ESSF(34), ICH(370), IDF(339), MS(191), PP(10), SBPS(141), SBS(771), SWB(1)

Habitat and Range

Mesic to dry, gravelly or rocky open forests and forest openings in the montane zone; frequent in BC east of the Coast-Cascade Mountains; N to NW NT, E to NF and S to ME, MA, VA, WV, IN, IA, SD, NM, UT, ID and WA.

SourceThe Illustrated Flora of British Columbia