Calamagrostis sesquiflora (Trin.) Tzvelev
one-and-a-half flowered reedgrass
Poaceae (Grass family)
Introduction to Vascular Plants
one-and-a-half flowered reedgrass
Poaceae (Grass family)
Introduction to Vascular Plants
Map
Distribution of Calamagrostis sesquiflora
Click here to view the full interactive map and legend
Species Information
General:
Perennial, tufted grass from fibrous roots and short rhizomes; stems unbranched, 15-50 cm tall, with 2 or sometimes 3 nodes.
Leaves:
Sheaths and collars smooth; blades flat to in-rolled, 2-5 mm wide, smooth below, smooth to rough above the leaf sheaths; ligules 2-5 mm long.
Flowers:
Inflorescence a contracted to somewhat open panicle 4-12 cm long, its branches to 4 cm long; spikelets 1-flowered; glumes long-pointed, 5-7 (8) mm long, often purple-tinged, smooth to rough only on the keels; lemmas 3-3.5 mm long, rough, 4-toothed at the tips, awned, the awns stout, twisted and bent, attached near the lemma base and exserted 3-6 mm beyond the glume tips, the callus hairs tufted, 2-3 mm long; rachillas 1-2 mm long, bearded with hairs about as 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 Calamagrostis sesquiflora
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) |
1052 | 750 | 1900 |
| Slope
Gradient (%) |
50 | 20 | 88 |
|
Aspect (degrees) |
153 | 20 | 240 |
| Soil
Moisture Regime (SMR) [0 - very xeric; 4 - mesic; 8 - hydric] |
2 | 1 | 5 |
| Modal
Nutrient Regime
Class |
B | ||
| #
of field plots species was recorded in: |
9 | ||
| Modal
BEC Zone Class |
CMA | ||
|
All BEC Zones (# of stations/zone) species was recorded in |
CMA(5), MH(4) | ||
|
Source:
Klinkenberg 2013
|
|||
Habitat and Range
Mesic to moist rocky slopes in the subalpine to lower alpine zones; infrequent on NW Vancouver Island, frequent on the Queen Charlotte Islands; amphiberingian, N to AK and S to N WA; NE Asia.Status Information
Synonyms
Synonyms and Alternate Names:
Calamagrostis arctica Vasey
Calamagrostis purpurascens subsp. arctica (Vasey) HultTn
Calamagrostis purpurascens subsp. tasuensis Calder & Roy L. Taylor
Calamagrostis purpurascens var. arctica (Vasey) Kearney
Calamagrostis purpurascens var. tasuensis (Calder & Taylor) Boivin
Calamagrostis vaseyi Beal