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

Danthonia intermedia Vasey
timber oatgrass
Poaceae (Grass family)

Introduction to Vascular Plants

© Jamie Fenneman  Email the photographer   (Photo ID #4207)

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Distribution of Danthonia intermedia
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SUBTAXA PRESENT IN BC
Danthonia intermedia ssp. intermedia

Species Information

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General:
Perennial tufted grass from fibrous roots; stems not disarticulating at the nodes, 10-50 (70) cm tall.
Leaves:
Sheaths usually smooth; blades long-hairy at the throat and collar, 1-3.5 mm wide, 5-10 cm long, smooth or slightly soft-hairy, not curled with age; ligules less than 1 mm long, fringed with short hairs.
Flowers:
Inflorescence a narrow, congested panicle with (4) 5 to 10 spikelets, the lower branches with (1) 2 or 3 spikelets, stiff and erect, shorter than the spikelets; spikelets (11) 12-15 (19) mm long; lemmas 7-10 mm long, smooth over the back and densely soft-hairy along the margins, the apical teeth pointed to long-pointed (not stiff-awned), 1.5-2.5 mm long, awned from the back, the awns abruptly bent, 6.5-8 mm long, the calluses longer than wide, with stiff hairs laterally; anthers sometimes to 4 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

Moist to dry meadows, grasslands, shrub-carrs, open forests, bogs and rocky slopes in the lowland to alpine zones; common in S BC south of 55 degrees N, infrequent northward; N to AK, E to NF and S to MI, SD, NM, AZ and CA.

Source: The Illustrated Flora of British Columbia

Ecology

Ecological Framework for Danthonia intermedia

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) 30 1597 2435
Slope Gradient (%) 0 18 230
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
0 168 360
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
0 3 8
Modal Nutrient Regime
Class
C
Number of field plots
 species was recorded in:
509
Modal BEC Zone Class
ESSF
All BEC Zones (# of stations/zone) species was recorded in: AT(5), BAFA(14), BWBS(2), CWH(9), ESSF(281), ICH(26), IDF(50), IMA(10), MH(7), MS(63), PP(4), SBPS(12), SBS(14), SWB(5)

Ecological Indicator Information

A shade-intolerant, submon­tane to subalpine, Asian and trans-continental North American grass. Species occurs on very dry to moderately dry, nitrogen-poor soils (Mar humus forms) within boreal, temperate, and cool mesothermal climates; their occurrence decreases with increasing elevation and precipitation. Sporadic in open-canopy, young-seral forests on strongly drained and shallow soils on water­shedding sites; often present in non-forested communities on rock outcrops. Characteristic of moisture-deficient sites.

SourceIndicator Plants of Coastal British Columbia (Information applies to coastal locations only)

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

Danthonia canadensis Baum & Findlay
Danthonia cusickii
Danthonia intermedia var. cusickii T.A. Williams

Taxonomic and Nomenclatural Links

Additional Photo Sources

Related Databases

General References