Details of...
Scientific Name: Rudbeckia hirta
Pronunciation: rud-BECK-ee-uh HUR-tuh
Common Name: black-eyed Susan , gloriosa daisy
Family Name: Asteraceae
Plant Type: Herbaceous perennial, Biennial
Key ID Features: Leaves alternate, lance-shaped and fuzzy up to 17 cm long with dentate margins; flower heads daisy-like, ray florets bright yellow to orange-yellow to dark red (cvs.), disk florets dark brown.
Course(s): HORT 1193/1293

Habit: Stiffly upright
Form: Oval - vertical
Texture: Medium - coarse
Mature Size:
Height:0.7 - 1.3m
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. 'Cherry Brandy', R. 'Chim Chiminee' and R. 'Prairie Sun'.
black-eyed Susan , gloriosa daisy
Leaf Morphology: Glossary
Form: Simple
Arrangement: Alternate
Texture/ Venation: Heavily veined, Leathery, Pinnate venation
Surfaces: Distinctive smell, Tomentose
Colour in Fall: Yellow
Leaf(let) Terms:
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, Yellow, Brown, Orange, Dark-red
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: Black, Brown
Fruiting Time: Sep, Oct
Additional Info: Persistent

Bark or Stem Colour: Green
Organ Modifications: Rhizomes

Propagation: Division - below ground parts, Softwood cuttings, Seed
Pest Susceptibility: Mildew, Rust, Slugs or snails, ( Pest resistant )
(BUG) BUG garden
(NRY) NuRserY
Location Map

Report an Error