Crepis atribarba A. Heller
slender hawksbeard
Asteraceae (Aster family)
Introduction to Vascular Plants
slender hawksbeard
Asteraceae (Aster family)
Introduction to Vascular Plants
SUBTAXA PRESENT IN BC
Species Information
General:
Perennial herb from a taproot and woody base; stems erect, 1-2, grey-woolly or sometimes eventually becoming glabrous, 15-70 cm tall.
Leaves:
Basal leaves linear to lanceolate, long-stalked, pinnately or bipinnately divided into linear or lanceolate segments or rarely entire, greyish-woolly or more often nearly glabrous, 10-35 cm long; stem leaves similar to the basal ones, becoming linear and entire upwards.
Flowers:
Heads with strap-shaped flowers, 3-40 in a flat- to round-topped inflorescence; involucres 8-15 mm tall, cylindric; involucral bracts greyish-woolly to nearly glabrous or rarely glabrous, with or without black, glandless bristles on the inner and sometimes the outer bracts, the outer ones 5-10, deltoid, abruptly sharp-pointed, the longest less than 1/2 as long as the 8-10 inner ones, these lanceolate, abruptly sharp-pointed or obtuse; ray flowers yellow, 10-18 mm long.
Fruits:
Achenes usually greenish or rarely brownish, 3-10 mm long, slender, weakly to strongly ribbed, mostly tapering to a slender tip at the apex; pappus white, of hairlike bristles.
Notes:
Two subspecies occur in BC:
1. Plants relatively small, 15-35 cm tall; heads 3-18; involucral bracts with some glandless bristles...................... ssp. atribarba
1. Plants taller, 30-70 cm tall; heads 10-40; involucral bracts nearly or completely devoid of bristles...................... ssp. originalis Babc. & Stebb.
Ecology
Ecological Framework for Crepis atribarba
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) |
790 | 238 | 1950 |
| Slope
Gradient (%) |
31 | 0 | 360 |
|
Aspect (degrees) |
213 | 1 | 360 |
| Soil
Moisture Regime (SMR) [0 - very xeric; 4 - mesic; 8 - hydric] |
2 | 0 | 5 |
| Modal
Nutrient Regime
Class |
C | ||
| #
of field plots species was recorded in: |
893 | ||
| Modal
BEC Zone Class |
IDF | ||
|
All BEC Zones (# of stations/zone) species was recorded in |
AT(1), BG(259), ESSF(2), ICH(21), IDF(356), MS(27), PP(202), SBS(1) | ||
|
Source:
Klinkenberg 2013
|
|||
Habitat and Range
Dry sandy or gravelly grasslands, shrublands and open forests in the steppe and lower montane zones; common (ssp. originalis) or rare (ssp. atribarba) in S BC east of the Coast-Cascade Mountains; E to AB and S to NV, UT and CA.Status Information
Synonyms
Synonyms and Alternate Names:
Crepis exilis