Rockrose

Rockrose

Cistus incanus
Scientific classification
Kingdom:Plantae
Division:Magnoliophyta
Class:Magnoliopsida
Order:Malvales
Family:Cistaceae
Genus:Cistus
Species

Cistus albanicus
Cistus albidus
Cistus chinamadensis
Cistus clusii
Cistus creticus
Cistus crispus
Cistus heterophyllus
Cistus ladanifer - Gum Rockrose
Cistus laurifolius
Cistus libanotis
Cistus monspeliensis - Montpelier Cistus
Cistus munbyi
Cistus osbeckiaefolius
Cistus parviflorus
Cistus populifolius
Cistus psilosepalus
Cistus salviifolius - Salvia Cistus
Cistus symphytifolius
Cistus varius


Ref: Ellul et al. (2002)

The rockrose is the name for the genus Cistus of the flowering plant family Cistaceae. These are perennial shrubs found on dry or rocky soils around the Mediterranean, from the Canary Islands through to the Middle East. The leaves are opposite, simple, usually slightly rough-surfaced, 2-8 cm long; in a few species (notably C. ladanifer), the leaves are coated with a highly aromatic resin-scented gum. They have showy 5-petaled flowers ranging from white to purple and dark pink, in a few species with a conspicuous dark red spot at the base of each petal. The genus Cistus contains about 20 species, and together with its many hybrids and cultivars is commonly encountered as a garden flower.

Note: the name "rockrose" is also used for the related genera Halimium, Helianthemum and Tuberaria, all in the family Cistaceae.

Ecology

The rockroses are thermophilous plants, which require open, sunny places. As with many other Cistaceae, the species of Cistus have the ability to form mycorrhizal associations with truffles (Tuber) and are thus to thrive on poor sandy soils or rocks.

The rockroses are the only host of Cytinus hypocistis, a small parasitic plant that lives on the roots and is noticeable only for a short period of time when in flower. The presence of the parasite does not seem to hurt the host population.

Missing image
Cistus_salviifolius.jpg
Cistus salviifolius
Missing image
Buberel_unknown_flower_9.jpg
A flower of a species of Cistus, possibly C. ladanifer
Missing image
Cistus_albidus(estepa_blanca).jpg
Cistus albidus photo taken near Sitges


References

  • Ellul P., M. Boscaiu, O. Vicente, V. Moreno, J. A. Rossello (2002). Intra- and Interspecific Variation in DNA Content in Cistus (Cistaceae). Annals of Botany 90(3): 345-351. (Available online: Abstract (http://www.aob.oupjournals.org/cgi/content/abstract/90/3/345) | Full text (HTML) (http://www.aob.oupjournals.org/cgi/content/full/90/3/345) | Full text (PDF) (http://www.aob.oupjournals.org/cgi/reprint/90/3/345.pdf))

External links

fr:Ciste he:לוטם nl:Cistus salviifolius

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