Erysimum asperum (Nutt.) DC.
prairie rocket (western wallflower)
Brassicaceae (Mustard family)
Introduction to Vascular Plants
prairie rocket (western wallflower)
Brassicaceae (Mustard family)
Introduction to Vascular Plants
Species Information
General:
Biennial herb from a simple or sometimes branched stem-base; stems erect, stout, 5-45 cm tall, simple or branched above, ash grey with a close hairiness.
Leaves:
Basal leaves thick, firm, numerous, more or less in a rosette, oblanceolate, wavy-toothed, stalked, 3-10 cm long, (2) 4-13 (25) mm wide, sharp-pointed at the tips, densely grey-hairy mainly with 2-rayed hairs; stem leaves narrowly lanceolate, entire to somewhat toothed.
Flowers:
Racemes bractless, 4-40 cm long; flower stalks 5-15 (20) mm long, stiffly erect or spreading; petals bright yellow to deep orange or somewhat reddish, 13-32 mm long, blades 4-8 (9) mm wide; sepals (6) 8-13 mm long, outer ones with a pouch at the base.
Fruits:
Siliques, (3) 5-11 (14) cm long, 1.3-2.7 mm wide, round in cross section to flattened; beaks 1-5 mm long, beak-like; seeds 1.5-2.3 mm long, wingless or slightly wing-margined at tip.
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 Erysimum asperum
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) |
915 | 915 | 915 |
| Slope
Gradient (%) |
55 | 55 | 55 |
|
Aspect (degrees) |
183 | 183 | 183 |
| Soil
Moisture Regime (SMR) [0 - very xeric; 4 - mesic; 8 - hydric] |
2 | 2 | 2 |
| Modal
Nutrient Regime
Class |
C | ||
| #
of field plots species was recorded in: |
1 | ||
| Modal
BEC Zone Class |
ICH | ||
|
All BEC Zones (# of stations/zone) species was recorded in |
ICH(1) | ||
|
Source:
Klinkenberg 2013
|
|||
Habitat and Range
Dry roadsides and rocky slopes in the montane zone; rare in SE BC; E to S MB and S to KS, MN, NM and N CA.Synonyms
Synonyms and Alternate Names:
Cheirinia aspera (Nutt.) Britt.
Erysimum amoenum (Greene) Rydb.
Erysimum argillosum (Greene) Rydb.
Erysimum arkansanum Nutt.
Erysimum asperrimum (Greene) Rydb.
Erysimum asperum var. amoenum (Greene) Reveal
Erysimum asperum var. angustatum (Rydb.) B. Boivin
Erysimum asperum var. arkansanum (Nutt.) A. Gray
Erysimum asperum var. capitatum (Douglas ex Hook.) B. Boivin
Erysimum asperum var. purshii Durand
Erysimum capitatum var. amoenum (Greene) R.J. Davis
Erysimum capitatum var. argillosum (Greene) R.J. Davis
Erysimum capitatum var. stellatum (J.T. Howell) Twisselmann
Erysimum capitatum var. washoense G. Rossb.
Erysimum desertorum (Woot. & Standl.) G. Rossb.
Erysimum elatum Nutt.
Erysimum moniliforme Eastw.
Erysimum nivale (Greene) Rydb.
Erysimum wheeleri Rothr.