# Cistus horrens

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Species of flowering plants in the rock rose family Cistaceae

Cistus horrens Scientific classification Kingdom: Plantae Clade: Embryophytes Clade: Tracheophytes Clade: Spermatophytes Clade: Angiosperms Clade: Eudicots Clade: Rosids Order: Malvales Family: Cistaceae Genus: Cistus Species: C. horrens Binomial name Cistus horrens Demoly[1]

***Cistus horrens*** is a [shrubby](/source/Shrub) [species](/source/Species) of [flowering plant](/source/Flowering_plant) in the family [Cistaceae](/source/Cistaceae), with purple to pink flowers. It is [endemic](/source/Endemism) to [Gran Canaria](/source/Gran_Canaria) in the [Canary Islands](/source/Canary_Islands). First described as a species in 2004, it was previously identified as *[Cistus symphytifolius](/source/Cistus_symphytifolius)*, which it resembles.

## Description

*Cistus horrens* generally resembles the more widespread *[Cistus symphytifolius](/source/Cistus_symphytifolius)*. Differences include young branches covered with simple hairs; leaf blades grayer and shorter, densely covered with simple, glandular and stellate hairs on the upper surface and with longer simple hairs on the lower surface, with glandular hairs only on the nerves; sepals densely covered with simple hairs; and smaller fruiting capsules with fewer seeds.[2] The leaves are elliptical to lanceolate, stalked ([petiolate](/source/Petiole_(botany))) and have netted (reticulate) veins. The stigmas are longer than the stamens.[3]

## Taxonomy and phylogeny

*Cistus horrens* was first described as a new species by Jean-Pierre Demoly in 2004;[1] it had previously been treated as *C. symphytifolius*.[2] The specific epithet *horrens* is [Latin](/source/Latin) for "standing erect, bristling".[4]

A 2011 [molecular phylogenetic study](/source/Molecular_phylogenetics) placed *C. horrens* as a member of the purple and pink flowered clade (PPC) of *Cistus* species, along with some other Canary Island endemics (*[Cistus asper](/source/Cistus_asper)*, *[Cistus chinamadensis](/source/Cistus_chinamadensis)*, *[Cistus ocreatus](/source/Cistus_ocreatus)*, and *[Cistus symphytifolius](/source/Cistus_symphytifolius)*).[5]

Species-level cladogram of Cistus species. Halimium spp. Halimium spp. PPC Cistus crispus Cistus heterophyllus Cistus albidus Cistus creticus Cistus asper Cistus chinamadensis Cistus horrens Cistus ocreatus Cistus osbeckiifolius Cistus palmensis Cistus symphytifolius WWPC Cistus clusii Cistus munbyi Cistus inflatus Cistus ladanifer Cistus laurifolius Cistus libanotis Cistus monspeliensis Cistus parviflorus Cistus populifolius Cistus pouzolzii Cistus salviifolius Cistus sintenisii Purple Pink Clade White Whitish Pink Clade Species-level cladogram of Cistus species, based on plastid and nuclear DNA sequences.[5][6][7][8]

## Distribution and habitat

*Cistus horrens* is [endemic](/source/Endemism) to [Gran Canaria](/source/Gran_Canaria) in the [Canary Islands](/source/Canary_Islands),[3] being found in the south-west sector of the island.[2] It is typically found at elevations of 300–1,500 metres (1,000–4,900 ft) in pine forests, in semiarid conditions.[3]

## References

1. ^ [***a***](#cite_ref-TPL_kew-2723437_1-0) [***b***](#cite_ref-TPL_kew-2723437_1-1) ["*Cistus horrens*"](http://www.theplantlist.org/tpl1.1/record/kew-2723437), *The Plant List*, retrieved 2015-03-02

1. ^ [***a***](#cite_ref-JBVC_2-0) [***b***](#cite_ref-JBVC_2-1) [***c***](#cite_ref-JBVC_2-2) ["*Cistus horrens* Demoly"](http://www.jardincanario.org/-/especie-cistus-horrens-demoly), *Jardín Botánico Viera y Clavijo* (in Spanish), Cabildo de Gran Canaria, retrieved 2015-03-13

1. ^ [***a***](#cite_ref-GuzmVarg10_3-0) [***b***](#cite_ref-GuzmVarg10_3-1) [***c***](#cite_ref-GuzmVarg10_3-2) Guzmán, Beatriz & Vargas, Pablo (2010), "Unexpected synchronous differentiation in Mediterranean and Canarian *Cistus* (Cistaceae)", *Perspectives in Plant Ecology, Evolution and Systematics*, **12** (3): 163–174, [doi](/source/Doi_(identifier)):[10.1016/j.ppees.2009.09.002](https://doi.org/10.1016%2Fj.ppees.2009.09.002), p. 167

1. **[^](#cite_ref-LWST_4-0)** ["*horreo*"](https://www.perseus.tufts.edu/hopper/morph?l=horrens&la=la), *Latin Word Study Tool*, Tufts University, retrieved 2015-03-14

1. ^ [***a***](#cite_ref-CiveLeclDemoAgna11_5-0) [***b***](#cite_ref-CiveLeclDemoAgna11_5-1) Civeyrel, Laure; Leclercq, Julie; Demoly, Jean-Pierre; Agnan, Yannick; Quèbre, Nicolas; Pélissier, Céline & Otto, Thierry (2011), "Molecular systematics, character evolution, and pollen morphology of Cistus and Halimium (Cistaceae)", *Plant Systematics and Evolution*, **295** (1–4): 23–54, [doi](/source/Doi_(identifier)):[10.1007/s00606-011-0458-7](https://doi.org/10.1007%2Fs00606-011-0458-7), [hdl](/source/Hdl_(identifier)):[2078.1/219851](https://hdl.handle.net/2078.1%2F219851), [S2CID](/source/S2CID_(identifier)) [21995828](https://api.semanticscholar.org/CorpusID:21995828)

1. **[^](#cite_ref-GuzmVarg09_6-0)** Guzmán, B. & Vargas, P. (2009). "Historical biogeography and character evolution of Cistaceae (Malvales) based on analysis of plastid rbcL and trnL-trnF sequences". *Organisms Diversity & Evolution*. **9** (2): 83–99. [doi](/source/Doi_(identifier)):[10.1016/j.ode.2009.01.001](https://doi.org/10.1016%2Fj.ode.2009.01.001).

1. **[^](#cite_ref-GuzmVarg05_7-0)** Guzmán, B. & Vargas, P. (2005), "Systematics, character evolution, and biogeography of *Cistus* L. (Cistaceae) based on ITS, trnL-trnF, and matK sequences", *Molecular Phylogenetics and Evolution*, **37** (3): 644–660, [doi](/source/Doi_(identifier)):[10.1016/j.ympev.2005.04.026](https://doi.org/10.1016%2Fj.ympev.2005.04.026), [PMID](/source/PMID_(identifier)) [16055353](https://pubmed.ncbi.nlm.nih.gov/16055353)

1. **[^](#cite_ref-GuzmLled09_8-0)** Guzman, B.; Lledo, M.D. & Vargas, P. (2009). ["Adaptive Radiation in Mediterranean *Cistus* (Cistaceae)"](https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2719431). *PLOS ONE*. **4** (7) e6362. [Bibcode](/source/Bibcode_(identifier)):[2009PLoSO...4.6362G](https://ui.adsabs.harvard.edu/abs/2009PLoSO...4.6362G). [doi](/source/Doi_(identifier)):[10.1371/journal.pone.0006362](https://doi.org/10.1371%2Fjournal.pone.0006362). [PMC](/source/PMC_(identifier)) [2719431](https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2719431). [PMID](/source/PMID_(identifier)) [19668338](https://pubmed.ncbi.nlm.nih.gov/19668338).

Taxon identifiers Cistus horrens Wikidata: Q15330314 Wikispecies: Cistus horrens APDB: 184123 BOLD: 420981 CoL: VLM6 EoL: 5731867 GBIF: 3595246 IPNI: 60434395-2 NCBI: 566272 Open Tree of Life: 592353 Plant List: kew-2723437 POWO: urn:lsid:ipni.org:names:60434395-2 Tropicos: 100311894 WFO: wfo-0000607376

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Adapted from the Wikipedia article [Cistus horrens](https://en.wikipedia.org/wiki/Cistus_horrens) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Cistus_horrens?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.