Artemisia tilesii Ledeb.
Aleutian mugwort (Tilesius' wormwood)
Asteraceae (Aster family)
Introduction to Vascular Plants
Aleutian mugwort (Tilesius' wormwood)
Asteraceae (Aster family)
Introduction to Vascular Plants
Species Information
General:
Perennial herb from a rhizome; stems erect, several, 0.3-1.5 m tall.
Leaves:
Basal leaves soon deciduous; stem leaves linear-lanceolate to oblanceolate, egg-shaped or almost round in outline, few-toothed or lobed to deeply pinnate or subpalmately divided, some of the segments again toothed or divided, white-woolly below, green or rarely finely white-woolly above, 5-15 cm long.
Flowers:
Heads disciform, erect or nodding in a compact or narrow, branched inflorescence; involucres bell-shaped or top-shaped, 3-5 mm tall; involucral bracts broadly lanceolate to egg-shaped, purplish or sometimes green; receptacles glabrous; female flowers 8-12; disk flowers 20-40.
Fruits:
Achenes glabrous.
Notes:
Only two varieties of this species are readily separated taxonomically, and to a lesser extent geographically, in our region (Douglas 1995). They may be separated as follows:
1. Inflorescence relatively short and compact, usually overtopped by the upper leaves .....................var. tilesii
1. Inflorescence ample and open to subcompact in a narrow, branched inflorescence, always surpassing the upper leaves....................... var. unalaschcensis (Bess.) Hult.
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
USDA Species Characteristics
Flower Colour:
Yellow
Blooming Period:
Summer
Fruit/Seed characteristics:
Colour: Brown
Present over the
According to the USDA, this species is a known allelopath.
Source: The USDA
Ecology
Ecological Framework for Artemisia tilesii
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) |
948 | 60 | 1845 |
| Slope
Gradient (%) |
13 | 0 | 70 |
|
Aspect (degrees) |
127 | 20 | 315 |
| Soil
Moisture Regime (SMR) [0 - very xeric; 4 - mesic; 8 - hydric] |
4 | 0 | 7 |
| Modal
Nutrient Regime
Class |
D | ||
| #
of field plots species was recorded in: |
38 | ||
| Modal
BEC Zone Class |
BWBS | ||
|
All BEC Zones (# of stations/zone) species was recorded in |
BAFA(1), BG(1), BWBS(17), CWH(1), ESSF(1), ICH(1), PP(1), SWB(14) | ||
|
Source:
Klinkenberg 2013
|
|||
Habitat and Range
Moist to mesic meadows, streambanks, gravel bars, rocky slopes and open forests in the lowland and montane to alpine zones; common in N BC, infrequent southward; circumboreal, N to AK, YT and NT; E to ON and S to MT, ID and OR, Eurasia.Status Information
Synonyms
Synonyms and Alternate Names:
Artemisia elatior (Torr. & A. Gray) Rydb.
Artemisia tilesii subsp. tilesii Ledeb.
Artemisia tilesii subsp. unalaschensis
Artemisia tilesii var. elatior Torr. & A. Gray
Artemisia tilesii var. tilesii Ledeb.
Artemisia tilesii var. unalaschcensis (Bess.) Hult.