Aristida purpurea Nutt.
red three-awn (purple threeawn)
Poaceae (Grass family)
Introduction to Vascular Plants
red three-awn (purple threeawn)
Poaceae (Grass family)
Introduction to Vascular Plants
Photograph
SUBTAXA PRESENT IN BC
Aristida purpurea var. longiseta
Species Information
General:
Perennial, strongly tufted grass from fibrous roots; stems hollow, minutely rough, mostly (15) 20-40 cm tall.
Leaves:
Sheaths open; blades 1-2 mm wide, 7-25 cm long, in-rolled, minutely rough; ligules scarcely 0.5 mm long, membranous, the frontal margins with hairs 2-3 mm long.
Flowers:
Inflorescence a narrow panicle, 5-10 cm long, the branches mostly loosely ascending; lower glumes 7-13 mm long, about 1/2 the length of the upper ones, awn-tipped; florets 10-15 mm long, the calluses flattened, about 1 mm long; lemma awns (4) 5-8 cm long, 3-branched, the lateral branches divergent; paleas 2-2.5 mm long, slightly surpassed by the lodicules.
Ecology
Ecological Framework for Aristida purpurea
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) |
444 | 352 | 538 |
| Slope
Gradient (%) |
16 | 0 | 40 |
|
Aspect (degrees) |
195 | 175 | 205 |
| Soil
Moisture Regime (SMR) [0 - very xeric; 4 - mesic; 8 - hydric] |
1 | 0 | 2 |
| Modal
Nutrient Regime
Class |
A | ||
| #
of field plots species was recorded in: |
5 | ||
| Modal
BEC Zone Class |
BG | ||
|
All BEC Zones (# of stations/zone) species was recorded in |
BG(5) | ||
|
Source:
Klinkenberg 2013
|
|||