Scientific Name:
Helianthus tuberosus
Pronunciation:
hee-lee-AN-thus too-bur-OH-sus
Common Name:
Jerusalem artichoke
Family Name:
Asteraceae
Plant Type:
Herbaceous perennial, Invasive plant
Key ID Features:
Leaves on the lower stem are broad ovoid-acute, up to 30cm long, rough texture and hairy; flowers heads yellow, 5–10m wide, with 10–20 ray florets.
Habit:
Upright
Form:
Pyramidal - narrowly
Texture:
Mature Height:
2 - 3m
Mature Spread:
0.6 - 1.0m
Growth Rate:
Fast
Origin:
Canada - eastern, U.S. - northeast
Hardiness Rating:
Zone 4: (-34 to -29 °C)
Exposure:
Full sun
Soil/Growing Medium:
Landscape Uses:
Fall interest, Herb, Perennial border, Urban agriculture
Additional Info:
Leaf Morphology:
Form:
Simple
Arrangement:
Opposite
Texture/Venation:
Soft flexible
Surfaces:
Pubescent
Shapes:
Oblong, Ovate
Apices:
Acute
Bases:
Attenuate
Margins:
Dentate
Additional Info:
lower surface with sharp stiff hairs
Inflorescence Type:
Head (capitulum), Floriferous
Flower Morphology:
Flowers perfect
Corolla Shape:
Ligulate
Ovary Position:
Inferior
Colour (petals):
Yellow
Flower Time at Peak:
Oct
Fruit Type:
Achene
Fruit Colour:
Brown, Black
Fruiting Time:
Additional Info:
Not showy,
Bark or Stem Colour:
Organ Modifications:
Rhizomes, Tubers, Google Images(may be connected by stolons and may appear rhizome-like)
Pest Susceptibility:
(Pest resistant, Disease resistant, Drought tolerant)
