Scientific Name:
Helichrysum thianschanicum
Pronunciation:
hell-ih-KRYE-zum thee-an-SHAN-ee-kum
Common Name:
silver spike
Family Name:
Asteraceae
Plant Type:
Annual (grown as)
Key ID Features:
Leaves linear-spatulate (to linear-lanceolate on flowering stems), 6-10cm long x 2-4mmwide, tomentose, hairs whitish-grayish; heads ~1cm wide, yellow with ~25 florets, in corymb-like arrangement, Jul-Sep.
Habit:
Open, Upright
Form:
Round
Texture:
Fine
Mature Height:
0.4 - 0.7m
Mature Spread:
0.3 - 0.6m
Origin:
Europe
Hardiness Rating:
Zone 8a: (-12 to -9.5 °C)
Exposure:
Full sun
Soil/Growing Medium:
Alkaline, Rocky or gravelly or dry, Well-drained
Water Use:
Low, Winter dry
Landscape Uses:
Bedding plant, Container planting
Additional Info:
Google. Compare to "curry plant".
Leaf Morphology:
Form:
Simple
Arrangement:
Alternate, Basal
Texture/Venation:
Soft flexible
Surfaces:
Pubescent, Tomentose
Colour in Summer:
Silver / Grayish
Shapes:
Linear
Apices:
Acute
Margins:
Entire
Inflorescence Type:
Head (capitulum), Floriferous, Corymb-like
Flower Morphology:
Flowers perfect
Number Of Petals:
5
Corolla Shape:
Tubular
Ovary Position:
Inferior
Colour (petals):
Showy, Yellow
Flower Time at Peak:
Jul, Aug, Sep
Fruit Type:
Achene
Fruit Colour:
Brown
Fruiting Time:
Sep, Oct
Bark or Stem Colour:
Grey, Green
Organ Modifications:
Rhizomes
Pest Susceptibility:
(Deer resistant, Drought tolerant)
