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Hoary Rock-rose

Helianthemum oelandicum

Please keep in mind that it is illegal to uproot a plant without the landowner's consent and care should be taken at all times not to damage wild plants. Wild plants should never be picked for pleasure and some plants are protected by law.
For more information please download the BSBI Code of Conduct PDF document.

Plant Data

Flowering Months:
JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC
Order:
Malvales
Family:
Cistaceae (Rock-rose)
Also in this family:
Type:
Flower
Life Cycle:
Perennial
Maximum Size:
25 centimetres tall
Habitats:
Cliffs, grassland, heathland, rocks, seaside.

Flower:
֍
Yellow, 5 petals
 
Flowers are 15mm across. The similar-looking Common Rock-rose (Helianthemum nummularium) has larger flowers. Their styles are S-shaped.
Fruit:
A many-seeded fruit capsule.
Leaves:
Dark green, opposite untoothed leaves which are oval and one-veined. The leaves are smaller and greyer than those of the similar looking and much more frequent Common Rock-rose. Inrolled leaf margins. Often hairy and without leaf stipules. Prostrate perennial. Hoary Rock-rose is typically found growing on south and west-facing slopes. Locally abundant but nationally scarce in the UK.
Frequency (UK):
Rarely seen  
Similar Species:
Additional Information

There are 3 subspecies of Hoary Rock-rose that exist in the UK:

  • Helianthemum oelandicum incanum (Found on the coasts of North/South Wales and North-west England)
    Flowers are in clusters of 3 to 6. Leaves are very hairy above.
  • Helianthemum oelandicum levigatum (Cronkley Fell, Upper Teesdale)
    Flowers are in clusters of 1 to 3. Leaves are not hairy, or almost hairless.
  • Helianthemum oelandicum piloselloides (The Burren, West Ireland)
    Sparsely hairy and larger leaves than the other 2 species (10mm or more in diameter).

Distribution Map

Reproduced by kind permission of the BSBI.

Click to open an Interactive Map