Scientific Name:
Eryngium planum
Pronunciation:
ur-IN-jee-um PLAY-num
Common Name:
blue sea holly, flat sea holly
Family Name:
Apiaceae
Plant Type:
Broadleaf evergreen
Key ID Features:
Basal, clumping, taproot; leaves dark green, oblong-ovate, leathery, dentate; flowers blue/blue-green bracts, Aug-Oct, tight clustered spikes, umbels (three or more may arise from common node).
Habit:
Upright
Form:
Oval - vertical
Texture:
Coarse
Mature Height:
0.7 - 1.3m
Mature Spread:
0.3 - 0.6m
Growth Rate:
Moderate
Origin:
Europe
Hardiness Rating:
Zone 4: (-34 to -29 °C)
Exposure:
Full sun
Soil/Growing Medium:
Well-drained
Landscape Uses:
Attract beneficial insects, Attract butterflies, Cut flower or foliage, Dried flower or fruit, Fall interest, Perennial border, Small garden/space, Summer interest
Additional Info:
Google. Cultivars shown may include E. 'Blaukappe', E. 'Blue Glitter'. and E. 'Blue Hobbit'. Similar to Mediterranean sea holly.
Leaf Morphology:
Form:
Simple
Arrangement:
Basal
Texture/Venation:
Leathery
Surfaces:
Glabrous
Colour in Summer:
Dark-green
Colour in Fall:
Green-yellow
Shapes:
Oblong, Ovate
Margins:
Dentate, Palmately lobed, Spinose
Inflorescence Type:
Umbel, Floriferous, Head-like
Flower Morphology:
Flowers perfect
Number Of Petals:
5
Corolla Shape:
Funnelform
Ovary Position:
Inferior
Colour (petals):
Showy, Blue
Flower Scent:
None
Flower Time at Peak:
Aug, Sep, Oct
Fruit Type:
Achene, Schizocarp
Fruit Colour:
Brown
Fruiting Time:
Additional Info:
Not showy
Bark or Stem Colour:
Organ Modifications:
Storage tap root, may be invasive
Pest Susceptibility:
(Rabbit resistant, Drought tolerant)
