Scientific Name:
Rudbeckia hirta
Pronunciation:
rud-BECK-ee-uh HUR-tuh
Common Name:
black-eyed Susan, gloriosa daisy
Family Name:
Asteraceae
Plant Type:
Biennial, Herbaceous perennial
Key ID Features:
Leaves alternate, fuzzy, lance-shaped, up to 17cm long with dentate margins; flower heads daisy-like, ray florets bright yellow to orange-yellow to dark red (cvs.), disk florets dark brown.
Habit:
Stiffly upright
Form:
Oval - vertical
Texture:
Medium - coarse
Mature Height:
0.7 - 1.3m
Mature Spread:
0.6 - 1.0m
Growth Rate:
Fast
Origin:
Garden origin
Hardiness Rating:
Zone 4: (-34 to -29 °C)
Exposure:
Full sun, Part sun/part shade
Soil/Growing Medium:
Well-drained
Water Use:
Moderate
Landscape Uses:
Accent plant, Attract beneficial insects, Attract butterflies, Cut flower or foliage, Ground cover, Group or mass planting, Perennial border, Summer interest
Additional Info:
Google. Cultivars shown or on campus may include R. 'Becky Mix', R. 'Cherry Brandy', R. 'Chim Chiminee' and R. 'Prairie Sun'.
Leaf Morphology:
Form:
Simple
Arrangement:
Alternate
Texture/Venation:
Leathery, Heavily veined, Pinnate venation
Surfaces:
Tomentose, Distinctive smell
Colour in Fall:
Yellow
Shapes:
Oblanceolate, Obovate, Spatulate
Apices:
Acuminate
Bases:
Obtuse
Margins:
Dentate
Inflorescence Type:
Head (capitulum)
Flower Morphology:
Flowers perfect
Corolla Shape:
Ligulate
Ovary Position:
Inferior
Colour (petals):
Showy, Orange, Yellow, Dark-red, Brown
Flower Scent:
Fragrant
Flower Time at Peak:
Aug, Sep, Oct, Nov
Additional Info:
flowers in second year when grown from seed
Fruit Type:
Achene
Fruit Colour:
Brown, Black
Fruiting Time:
Sep, Oct
Additional Info:
Persistent
Bark or Stem Colour:
Green
Organ Modifications:
Rhizomes
Propagation:
Seed, Softwood cuttings, Division - below ground parts
Pest Susceptibility:
Mildew, Rust, Slugs or snails (Pest resistant)
