Rudbeckia hirta L.
black-eyed susan (blackeyed susan)
Asteraceae (Aster family)
Introduction to Vascular Plants
black-eyed susan (blackeyed susan)
Asteraceae (Aster family)
Introduction to Vascular Plants
SUBTAXA PRESENT IN BC
Rudbeckia hirta var. pulcherrima
Species Information
General:
Biennial to short-lived perennial herb from a thick, woody stem-base; stems erect, solitary to several, simple or few-branched above, rough-hairy, 30-100 cm tall.
Leaves:
Basal leaves soon deciduous; stem leaves alternate, oblanceolate to elliptic, entire to toothed, 3-15 cm long, 1-3 cm wide, long-stalked near the bases, becoming unstalked, lanceolate to egg-shaped and reduced upwards.
Flowers:
Heads with ray and disk flowers, solitary at the ends of branches; disks hemispheric or egg-shaped, dark purple or brown, 10-20 mm wide; involucral bracts 6-10 mm, lanceolate, reflexed when mature, long-hairy; ray flowers orange, 8-20, darker at the tips, reflexed, 2-4 cm long; disk flowers purple or brown; receptacular bracts abruptly sharp-pointed, hairy near the tip.
Fruits:
Achenes oblong, glabrous, 1.8-2 mm long; pappus lacking.
USDA Species Characteristics
Flower Colour:
Orange
Blooming Period:
Summer
Fruit/Seed characteristics:
Colour: Brown
Present over the Summer
Source: The USDA
Ecology
Ecological Framework for Rudbeckia hirta
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) |
1470 | 1470 | 1470 |
| Slope
Gradient (%) |
12 | 12 | 12 |
|
Aspect (degrees) |
180 | 180 | 180 |
| Soil
Moisture Regime (SMR) [0 - very xeric; 4 - mesic; 8 - hydric] |
4 | 4 | 4 |
| Modal
Nutrient Regime
Class |
|||
| #
of field plots species was recorded in: |
1 | ||
| Modal
BEC Zone Class |
ESSF | ||
|
All BEC Zones (# of stations/zone) species was recorded in |
ESSF(1) | ||
|
Source:
Klinkenberg 2013
|
|||