Poa lettermanii Vasey
Letterman's bluegrass
Poaceae (Grass family)
Introduction to Vascular Plants
Letterman's bluegrass
Poaceae (Grass family)
Introduction to Vascular Plants
Photograph
Species Information
General:
Perennial, densely tufted grass from fibrous roots; stems 1-12 cm tall.
Leaves:
Sheath margins open 3/4-7/8 their length; blades 0.5-2 mm wide, flat or folded, thin; ligules 1-3 mm long, the backs smooth.
Flowers:
Inflorescence an erect panicle, 1-3 cm long, contracted, usually exserted from the top sheath, the branches appressed to ascending, slender, to 1.5 cm long, smooth, slightly grooved; spikelets laterally compressed, usually green, 3-4 mm long, longer than the stalks, 2- to 3-flowered; glumes usually equalling or exceeding the lower lemmas, the lower glumes 3-nerved; rachilla internodes less than 1 mm long, smooth; lemmas lanceolate, 2.5-3 mm long, thinly membranous, surface hairless or keels and marginal nerves sparsely minutely soft-hairy below; calluses hairless; palea keels rough; flowers bisexual; anthers 0.2-0.8 mm long.
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.
Illustration Source: The Illustrated Flora of British Columbia
Ecology
Ecological Framework for Poa lettermanii
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)
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) |
2048 | 1580 | 2505 |
| Slope
Gradient (%) |
21 | 2 | 36 |
|
Aspect (degrees) |
190 | 104 | 269 |
| Soil
Moisture Regime (SMR) [0 - very xeric; 4 - mesic; 8 - hydric] |
1 | 1 | 2 |
| Modal
Nutrient Regime
Class |
C | ||
| #
of field plots species was recorded in: |
5 | ||
| Modal
BEC Zone Class |
ESSF | ||
|
All BEC Zones (# of stations/zone) species was recorded in |
AT(1), BAFA(1), ESSF(2), IMA(1) | ||
|
Source:
Klinkenberg 2013
|
|||
Habitat and Range
Mesic to dry rocky slopes and meadows in the subalpine and alpine zones; infrequent throughout BC east of the Coast Mountains; S to CO, UT, NV and CA.Status Information
Synonyms
Synonyms and Alternate Names:
Poa montevansii L. Kelso
Puccinellia lettermanii (Vasey) Ponert