Scientific Name:
Coreopsis verticillata
Pronunciation:
core-ee-OP-sis vur-tiss-ih-LAY-tuh
Common Name:
threadleaf coreopsis, whorled tickseed
Family Name:
Asteraceae
Plant Type:
Herbaceous perennial
Key ID Features:
Leaves opposite, fan-shaped in outline, most 3-5cm long x 4-6cm wide, 3-parted, with each leaflet deeply incised to form mostly 5 thread-like segments 1-2cm long x 1-2mm wide; flower heads up to 3-5cm wide, singly or cymose, ray florets 8, petal-like, golden yellow to creamy white (cvs.) with notched tips, disk florets yellow.
Habit:
Dense, Spreading
Form:
Mounded
Texture:
Fine
Mature Height:
0.4 - 0.7m
Mature Spread:
0.3 - 0.6m
Growth Rate:
Fast
Origin:
U.S. - southwest
Hardiness Rating:
Zone 4: (-34 to -29 °C)
Exposure:
Full sun
Soil/Growing Medium:
Rocky or gravelly or dry, Well-drained
Water Use:
Summer dry
Landscape Uses:
Attract beneficial insects, Attract butterflies, Container planting, Cut flower or foliage, Ground cover, Group or mass planting, Perennial border, Summer interest
Additional Info:
Google. Cultivars shown or on campus may include C. 'Moonbeam', C. 'Zagreb', and C. 'Golden Gain'. Compare to the hybrid, C. 'Creme Brulee'.
Leaf Morphology:
Form:
Simple, Lobed, Dissected
Arrangement:
Opposite
Texture/Venation:
Soft flexible
Surfaces:
Glabrous
Colour in Fall:
Green-yellow
Shapes:
Linear, Rhomboidal, Other
Apices:
Obtuse
Bases:
Truncate
Margins:
Incised, Pinnately lobed
Inflorescence Type:
Head (capitulum), Floriferous
Flower Morphology:
Flowers perfect
Corolla Shape:
Ligulate
Ovary Position:
Inferior
Colour (petals):
Showy, Yellow (pale yellow)
Flower Scent:
None
Flower Time at Peak:
Jun, Jul, Aug, Sep
Fruit Type:
Cypsela (achene + calyx)
Fruit Colour:
Brown
Fruiting Time:
Aug, Sep, Oct
Additional Info:
Not showy
Bark or Stem Colour:
Green
Organ Modifications:
Fibrous-like roots, Rhizomes
Propagation:
Softwood cuttings, Division - below ground parts
Maintenance:
Low
Other:
Deadhead to extend bloom period.
Pest Susceptibility:
Slugs or snails (Pest resistant, Disease resistant, Deer resistant, Drought tolerant)
Course(s):
- CLT Training
- HORT 1193/1293
- HORT 2355
Location(s):
- (AGB) Acer Griseum Bed : cv. Zagreb
- (BCW) Boulevard (Circular) Westend : auditorium planting - q.6
- (BUG) BUG garden : (cvs. dead?): Golden Gain, Moonbeam
- (FEA) Field lab Equipment Area : cv. Moonbeam
- (GRB) GRass Bed
- (GRBW) GRass Bed West : cv. Moonbeam
- (WDH) Wark-Dumais House
- (WLG) WoodLand Garden : cv. Moonbeam