Hoary Rock-rose

Names and Synonyms

Common Names

• Hoary Rock-rose
• Large Pink Cistus

Scientific Names

Accepted name

Synonyms

• Cistus vulgaris var. incanus
• Cistus villosus var. incanus
• Cistus × incanus f. albiflorus
• Helianthemum × pulverulentum
• Cistus × pulverulentus f. delilei
• Cistus × ferreri
• Cistus × delilei
• Cistus × braunii
• Cistus × bornetii
• Cistus × pratii
• Cistus × pulverulentus
• Cistus × mercedis

Sources: Catalogue of Life

Taxonomical Classification

This plant belongs to the kingdom Plantae and is classified within the phylum Streptophyta and the class Equisetopsida. It is further organized under the subclass Magnoliidae and the order Malvales, falling into the family Cistaceae. Finally, its taxonomic designation concludes with the genus Cistus.

Sources: The World Checklist of Vascular Plants (WCVP)

Distribution

This plant exhibits a diverse geographical range spanning multiple continents. In Southwestern Europe, it can be found growing across both France and Spain. Its presence extends further south into Northern Africa, specifically within the territory of Morocco. Interestingly, the species also reaches across the Atlantic to the Southwestern United States. Within that North American region, its distribution is specifically noted in California.

Sources: The World Checklist of Vascular Plants (WCVP)

Botanical Identification

Life history

The life history of Cistus × incanus is characterized by its perennial lifecycle, allowing the plant to persist in its environment through multiple growing seasons. In terms of its structural growth habit, it is classified as a phanerophyte, specifically functioning as a phanerophyte (and more specifically a nanophanerophyte) due to its woody stem structure that keeps its buds well above the soil surface. This life form enables the plant to maintain a stable presence in its native Mediterranean habitats, utilizing its perennial nature to survive varying seasonal conditions.

Life form :

phanerophyte

Lifecycle :

perennial

Morphology

The morphology of Cistus × incanus is characterized by a woody growth form, functioning primarily as a shrub. As a terrestrial species, it does not exhibit aquatic or semiaquatic tendencies, nor does it function as an epiphyte. The plant is an independent organism, lacking any parasitic behavior, and is classified as self-supporting rather than acting as a liana, vine, or climbing plant. Its structural development is defined by its woody nature, which provides the necessary stability for its shrubby habit.

Aquatic :

terrestrial

Climber :

self-supporting

Epiphyte :

terrestrial

Growth form :

shrub

Parasite :

independent

Woodiness :

woody

Physiology

The physiology of Cistus × incanus is fundamentally characterized by its use of the C3 photosynthetic pathway, a process where carbon dioxide is fixed directly into a three-carbon compound during the first stage of the Calvin cycle. This metabolic strategy dictates the plant's resource management, particularly its water-use efficiency and transpiration rates, which are critical for survival in its typically Mediterranean habitats. To complement its C3 metabolism and mitigate the physiological stress of high temperatures and seasonal droughts, the plant employs various adaptive mechanisms, including the regulation of stomatal conductance to balance gas exchange with moisture loss. Furthermore, the physiological processes of Cistus × incanus involve the synthesis and sequestration of secondary metabolites, such as polyphenols and terpenoids, which serve protective roles in managing oxidative stress and defending against herbivory, thereby supporting the plant's overall metabolic homeostasis.

Photosynthetic pathway :

C3

Reproduction

The reproduction of Cistus × incanus is characterized by the production of small seeds that exhibit specific quantitative variations in mass. The reproductive output involves seeds with a mean mass of approximately 0.0008583335 g, reflecting the typical scale of its propagules. Within a population, individual seed weights fluctuate, ranging from a minimum of 0.00055 g to a maximum of 0.00106 g. This variation in seed mass is a critical aspect of its reproductive strategy, influencing the potential for germination and seedling establishment within its ecological niche.

Seed mass max:

0.00106 g

Seed mass mean:

0.0008583335 g

Seed mass min:

0.00055 g

Sources: Global Inventory of Floras and Traits (GIFT)

Activities

Cistus × incanus has 1 reported activities identified across 0 scientific publications and several other databases. The most consistently reported activities include Antioxidant.

Antioxidant

1. Plants (Basel, Switzerland)