Scientific Name:
Juncus effusus
'Spiralis'
Pronunciation:
JUNK-us eh-FEW-zus
Common Name:
corkscrew rush
Family Name:
Juncaceae
Plant Type:
Aquatic plant, Herbaceous perennial, Poales (grass-like)
Key ID Features:
Compact rhizomes; stems twisted like a corkscrew, rigid, tubular, 30-50cm long x 2-4mm wide, dark-green, pith solid; leaves absent or small, narrow, reduced to basal sheaths; cymes 2-5cm long, one sided, flowers 3-6mm long, yellowish-green to pale brown, Jul-Sep.
Habit:
Spreading
Form:
Irregular
Texture:
Fine
Mature Height:
0.4 - 0.7m
Mature Spread:
0.3 - 0.6m
Growth Rate:
Moderate
Origin:
Africa - northern, Central / west Asia, Europe, Garden origin, North America, South America
Hardiness Rating:
Zone 7: (-18 to -12 °C)
Exposure:
Full sun, Part sun/part shade
Soil/Growing Medium:
Acidic, Bog, Rocky or gravelly or dry
Water Use:
Aquatic, Wetlands
Landscape Uses:
Accent plant, Aquatic - ponds, Container planting, Summer interest, Wetland - bogs
Additional Info:
Google. Compare to J. inflexus 'Afro'.
Leaf Morphology:
Form:
Simple
Arrangement:
Basal
Texture/Venation:
Parallel venation
Surfaces:
Glaucous
Colour in Summer:
Brown
Shapes:
Linear
Margins:
Entire
Additional Info:
Reduced to brown sheaths at base of stems
Inflorescence Type:
Cyme
Flower Morphology:
Flowers perfect
Number Of Petals:
3
Corolla Shape:
Rotate/stellate
Ovary Position:
Superior
Colour (petals):
Not showy, Green-yellow, Brown
Flower Scent:
None
Flower Time at Peak:
Jun
Additional Info:
Six tepals
Fruit Type:
Capsule
Fruit Colour:
Brown
Fruiting Time:
Aug, Sep
Additional Info:
Showy
Bark or Stem Colour:
Green
Organ Modifications:
Succulent stems
Propagation:
Seed, Division - below ground parts
Maintenance:
Medium
Other:
Remove from water and overwinter in a protected location in the garden or indoors; remove any straight stems to prevent the plant from reverting to species
Pest Susceptibility:
(Pest resistant, Disease resistant, Deer resistant)
Course(s):
- HORT 2355
- Level 2 Apprenticeship
Location(s):
- (FEA) Field lab Equipment Area : behind poly #1
- (NRY) NuRserY
- (WLG) WoodLand Garden