Crocanthemum

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Crocanthemum
Crocanthemum georgianum.jpg
Crocanthemum georgianum
Scientific classification Red Pencil Icon.png
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Malvales
Family: Cistaceae
Genus: Crocanthemum
Spach
Species

Around 24, see text

Crocanthemum is a genus of flowering plants in the family Cistaceae. [1] They are native to both North and South America where they are widespread. [2] The common name frostweed relates to the ice crystals which form from sap exuding from cracks near the base of the stem in the late fall. [3]

Crocanthemum are herbaceous perennials or subshrubs with alternate leaves. With the exception of species in California, they generally produce two types of flowers: showy, yellow chasmogamous (cross-pollinated) produced earlier in the growing season, followed by cleistogamous (self-pollinated) flowers that are smaller and lack petals. [2] [4] All species of Crocanthemum are fire tolerant and are found in open habitats.

Although the genus was first named in 1836 to encompass New World species of Helianthemum , it generally went unrecognized by taxonomists and its species were included in a broad concept of Helianthemum throughout much of the 1800s and 1900s. However, phylogenetic studies in 2004 and 2009 indicated that the New World species of Helianthemum were more closely related to Hudsonia than Old World Helianthemum. [2] [5] This required the resurrection of the genus Crocanthemum in order to maintain monophyly.

Species

Related Research Articles

<span class="mw-page-title-main">Cistaceae</span> Family of flowering plants comprising rock roses

The Cistaceae are a small family of plants known for their beautiful shrubs, which are profusely covered by flowers at the time of blossom. This family consists of about 170(-200) species in nine genera that are not very distinct, distributed primarily in the temperate areas of Europe and the Mediterranean basin, but also found in North America; a limited number of species are found in South America. Most Cistaceae are subshrubs and low shrubs, and some are herbaceous. They prefer dry and sunny habitats. Cistaceae grow well on poor soils, and many of them are cultivated in gardens.

<i>Cistus</i> Genus of flowering plants in the rock rose family Cistaceae

Cistus is a genus of flowering plants in the rockrose family Cistaceae, containing about 20 species. They are perennial shrubs found on dry or rocky soils throughout the Mediterranean region, from Morocco and Portugal through to the Middle East, and also on the Canary Islands.

<i>Helianthemum</i> Genus of flowering plants in the rock rose family Cistaceae

Helianthemum, known as rock rose, sunrose, rushrose, or frostweed, is a genus of about 110 species of flowering plants in the family Cistaceae. They are widely distributed throughout the Northern Hemisphere, especially in the Mediterranean.

<i>Cistus creticus</i> Species of flowering plants in the rock rose family Cistaceae

Cistus creticus is a species of shrubby plant in the family Cistaceae. Though it usually has pink flowers, of 4.5–5 cm diameter, this species is very variable. It is widely known as a decorative plant. It is frequently called "Cistus incanus".

<i>Cistus ladanifer</i> Species of flowering plants in the rock rose family Cistaceae

Cistus ladanifer is a species of flowering plant in the family Cistaceae. It is native to the western Mediterranean region. Common names include gum rockrose, labdanum, common gum cistus, and brown-eyed rockrose.

<i>Helianthemum nummularium</i> Species of flowering plants in the rock rose family Cistaceae

Helianthemum nummularium is a species of rock-rose (Cistaceae), native to most of Europe.

<i>Cistus salviifolius</i> Species of flowering plants in the rock rose family Cistaceae

Cistus salviifolius, common names sage-leaved rock-rose, salvia cistus or Gallipoli rose, is a shrub of the family Cistaceae.

<i>Cistus monspeliensis</i> Species of flowering plants in the rock rose family Cistaceae

Cistus monspeliensis is a species of rockrose known by the common name Montpellier cistus. It is native to southern Europe and northern Africa, in the Mediterranean forests, woodlands, and scrub ecosystems of matorral—maquis shrublands.

<i>Cistus laurifolius</i> Species of flowering plants in the rock rose family Cistaceae

Cistus laurifolius, commonly called laurel-leaf cistus, laurel-leaved cistus or laurel-leaved rock rose, is a species of highly branched flowering evergreen shrub native to some areas around the Mediterranean.

<i>Cistus albidus</i> Species of flowering plants in the rock rose family Cistaceae

Cistus albidus, the grey-leaved cistus, is a shrubby species of flowering plant in the family Cistaceae, with pink to purple flowers, native to south-western Europe and western north Africa.

<i>Cistus clusii</i> Species of flowering plants in the rock rose family Cistaceae

Cistus clusii is a shrubby species of flowering plant in the family Cistaceae, with white flowers, native to south west and south central Europe and north Africa. It has been wrongly called Cistus libanotis by many authors.

<i>Cistus crispus</i> Species of flowering plants in the rock rose family Cistaceae

Cistus crispus is a shrubby species of flowering plant in the family Cistaceae, with pink to purple flowers, native to south-western Europe and western north Africa.

<i>Cistus heterophyllus</i> Species of flowering plants in the rock rose family Cistaceae

Cistus heterophyllus is a shrubby species of flowering plant in the family Cistaceae.

<i>Cistus horrens</i> Species of flowering plants in the rock rose family Cistaceae

Cistus horrens is a shrubby species of flowering plant in the family Cistaceae, with purple to pink flowers. It is endemic to Gran Canaria in the Canary Islands. First described as a species in 2004, it was previously identified as Cistus symphytifolius, which it resembles.

Cistus inflatus is a shrubby species of flowering plant in the family Cistaceae, often known as Cistus psilosepalus, although this name is a synonym of the hybrid Cistus × laxus. It has white flowers.

<i>Cistus libanotis</i> Species of flowering plants in the rock rose family Cistaceae

Cistus libanotis is a shrubby species of flowering plant in the family Cistaceae, with white flowers. It has been confused with Cistus clusii, which it resembles, resulting in some uncertainty in its distribution. It is endemic to the Iberian Peninsula.

<i>Cistus munbyi</i> Species of flowering plants in the rock rose family Cistaceae

Cistus munbyi is a shrubby species of flowering plant in the family Cistaceae, with white flowers. Related to and resembling Cistus clusii, it is native to Morocco and Algeria in western north Africa.

Cistus ocreatus is a shrubby species of flowering plant in the family Cistaceae, with purple-pink flowers. It is sometimes treated as synonymous with Cistus symphytifolius or as its subspecies C. symphytifolius subsp. leucophyllus. Its name is sometimes spelt Cistus ochreatus. It is endemic to Gran Canaria in the Canary Islands.

<i>Cistus osbeckiifolius</i> Species of flowering plants in the rock rose family Cistaceae

Cistus osbeckiifolius is a shrubby species of flowering plant in the family Cistaceae, with pink to purple flowers.

<i>Cistus symphytifolius</i> Species of flowering plants in the rock rose family Cistaceae

Cistus symphytifolius is a shrubby species of flowering plant in the family Cistaceae. It is endemic to the Canary Islands".

References

  1. "Crocanthemum". Royal Botanical Gardens, Kew. Retrieved 2019-12-10.
  2. 1 2 3 Crocanthemum Flora of North America
  3. Niering, William A.; Olmstead, Nancy C. (1979). The Audubon Society Field Guide to North American Wildflowers - Eastern Region. Alfred A. Knopf, New York. p. 467. ISBN   0-394-50432-1.
  4. Alan Weakley (2015). "Flora of the Southern and Mid-Atlantic States".
  5. Guzman, Beatriz; Vargas, Pablo (21 January 2009). "Historical biogeography and character evolution of Cistaceae (Malvales) based on analysis of plastid rbcL and trnL-trnF sequences" (PDF). Organisms Diversity & Evolution. 9 (2): 83–99. doi:10.1016/j.ode.2009.01.001 . Retrieved 2019-12-11.