Scientific Name:
Helianthemum nummularium
Pronunciation:
hee-lee-AN-thee-mum num-you-LAIR-ee-um
Common Name:
rock rose
Family Name:
Cistaceae
Plant Type:
Herbaceous perennial
Key ID Features:
An evergreen trailing plant; leaves opposite, most lanceolate-elliptic, 2-4cm long x 5-9mm wide, gray-green, pubescent; flowers saucer-shaped in loose terminal clusters, bright white-yellow to pink-red, stamens bright orange and in tight cluster that is sensitive to touch (spread outwards to reveal the tall stigma in the middle).
Habit:
Spreading
Form:
Creeping / Mat-like
Texture:
Medium - fine
Mature Height:
0.2 - 0.4m
Mature Spread:
0.3 - 0.6m
Origin:
Europe
Hardiness Rating:
Zone 5: (-29 to -23 °C)
Exposure:
Full sun
Soil/Growing Medium:
Rocky or gravelly or dry, Well-drained
Landscape Uses:
Ground cover, Mixed shrub border, Rock garden, Summer interest
Additional Info:
Leaf Morphology:
Form:
Simple
Arrangement:
Opposite
Texture/Venation:
Soft flexible
Surfaces:
Pubescent
Colour in Summer:
Green, Dark-green, Silver / Grayish
Shapes:
Elliptic, Oblong, Ovate
Apices:
Acute
Bases:
Cuneate
Margins:
Entire
Inflorescence Type:
Cyme
Flower Morphology:
Flowers perfect
Number Of Petals:
5
Corolla Shape:
Rotate/stellate
Ovary Position:
Superior
Colour (petals):
Showy, White, Yellow, Pink, Red (Species is yellow)
Flower Time at Peak:
May, Jun, Jul
Fruit Type:
Capsule
Fruit Colour:
Brown
Fruiting Time:
Jul, Aug, Sep
Additional Info:
Not showy
Bark or Stem Colour:
Green, Red, Dark brown
Maintenance:
Medium
Pest Susceptibility:
(Pest resistant, Disease resistant, Drought tolerant)
Course(s):
- not used (on campus)
Location(s):
- (AGB) Acer Griseum Bed : cv. Harstwood Ruby
- (HPZ) Horticulture PlaZa : cv. Cerise Queen
- (NRY) NuRserY : cv. Cerise Queen