Trichophorum pumilum (Vahl) Schinz & Thell.
dwarf clubrush (Rolland's bulrush)
Cyperaceae (Sedge family)
Introduction to Vascular Plants
dwarf clubrush (Rolland's bulrush)
Cyperaceae (Sedge family)
Introduction to Vascular Plants
Species Information
General:
Perennial, tufted herb from slender rhizomes; stems nearly circular in cross-section, tapered, grooved, smooth, clothed at the base with dead stems and brown, persistent sheaths, up to 1 mm wide, 5-15 cm tall.
Leaves:
All near the base of the stem; sheaths blackish to brownish, not cross-wrinkled; upper 1 to 3 blades slender, green, up to 3 cm long.
Flowers:
Spikes solitary, terminal, medium to light brown, 2-3 mm long, 2- to 4-flowered; involucral bracts solitary, sometimes prolonged to more than 1/2 the lengths of the spikes, usually shorter, blunt-tipped.
Fruits:
Scales brown, egg-shaped, the margins often lustrous brown and translucent, blunt or more or less pointed, awnless or nearly so; perianth bristles lacking; achenes dark brown or blackish, plano-convex, smooth, more or less beaked, 1.2-1.5 mm long. vol6_5
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 Trichophorum pumilum
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) |
1177 | 1160 | 1195 |
| Slope
Gradient (%) |
0 | 0 | 0 |
|
Aspect (degrees) |
0 | ||
| Soil
Moisture Regime (SMR) [0 - very xeric; 4 - mesic; 8 - hydric] |
5 | 3 | 8 |
| Modal
Nutrient Regime
Class |
C | ||
| #
of field plots species was recorded in: |
2 | ||
| Modal
BEC Zone Class |
MS | ||
|
All BEC Zones (# of stations/zone) species was recorded in |
MS(1) | ||
|
Source:
Klinkenberg 2013
|
|||
Habitat and Range
Bogs, lakeshores, fens and wet meadows in the montane and subalpine zones; rare in BC east of the Coast-Cascade Mountains and N of 51degreeN; circumpolar, N to YT and NT, E to PQ and S to CO, ID and CA; Eurasia.Status Information
Synonyms
Synonyms and Alternate Names:
Baeothryon pumilum (Vahl) A. Löve & D. Löve
Scirpus pumilus Vahl
Scirpus pumilus subsp. rollandii (Fernald) Raymond
Scirpus pumilus var. rollandii (Fernald) Beetle
Scirpus rollandii Fernald
Trichophorum pumilum subsp. rollandii (Fernald) Roy L. Taylor & MacBryde
Trichophorum pumilum var. rollandii (Fernald) Hultén
Trichophorum rollandii (Fernald) Hultén