Phacelia

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Phacelia
Phacelia tanacetifolia 7735.JPG
Phacelia tanacetifolia
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Boraginales
Family: Boraginaceae
Subfamily: Hydrophylloideae
Genus: Phacelia
Juss. (1789)
Type species
Phacelia secunda
Diversity
About 200 species
Synonyms [1]
  • AldeaRuiz & Pav. (1794)
  • CosmanthusNolte ex A.DC. (1845)
  • EndiplusRaf. (1818)
  • Eutoca R.Br. (1823)
  • HeterytaRaf. (1808)
  • Howellanthus(Constance) Walden & R.Patt. (2010)
  • MicrogenetesA.DC. (1845)
  • MiltitziaA.DC. (1845)
  • WhitlaviaHarv. (1846)

Phacelia (phacelia, scorpionweed, heliotrope ) is a genus of about 200 species of annual or perennial herbaceous plants in the borage family, native to North and South America. California is particularly rich in species with over 90 recorded in the region. [2]

Contents

The genus is traditionally placed at family rank with the waterleafs (Hydrophyllaceae) in the order Boraginales. The Angiosperm Phylogeny Group, recognizing that the traditional Boraginaceae and Hydrophyllaceae are paraphyletic with respect to each other, merges the latter into the former and considers the family basal in the Euasterids I clade. Other botanists [3] continue to recognize the Hydrophyllaceae and Boraginales after analysing the secondary structure of the ITS1 genetic region rather than its sequence for these higher taxonomic levels. This placed Phacelia within the Hydrophyllaceae. [3] Further molecular taxonomic analysis of the Boraginales has divided the Boraginales in two and placed Phacelia among the monophyletic herbaceous Hydrophyllaceae in Boraginales II. [4]

The genus includes both annual and perennial species. [2] Many have been cultivated as garden and honey plants.

There are reports that glandular hairs of stems, flowers and leaves of some species of Phacelia secrete oil droplets that can cause an unpleasant skin rash (contact dermatitis) in some people, specifically from P. brachyloba, [5] P. campanularia, [6] P. crenulata, [5] [7] P. gina-glenneae, [8] P. grandiflora, [5] P. ixodes, [6] P. minor, [9] and P. pedicellata. [5] [6] The major contact allergen of P. crenulata has been identified as geranyl hydroquinone and of P. minor as geranylgeranylhydroquinone. [9]

The mining bee Andrena phaceliae is a specialist pollinator of this genus in the Eastern United States

Selected species

See also

Related Research Articles

<span class="mw-page-title-main">Boraginaceae</span> Family of flowering plants

Boraginaceae, the borage or forget-me-notfamily, includes about 2,000 species of shrubs, trees, and herbs in 146 to 154 genera with a worldwide distribution.

<span class="mw-page-title-main">Hydrophylloideae</span> Subfamily of plants

Hydrophylloideae is a subfamily of the plant family Boraginaceae. Their taxonomic position is somewhat uncertain. Traditionally, and under the Cronquist system, they were given family rank under the name Hydrophyllaceae, and treated as part of the order Solanales. More recent systems have recognised their close relationship to the borage family, Boraginaceae, initially by placing Hydrophyllaceae and Boraginaceae together in an order Boraginales, and most recently by demoting Hydrophyllaceae to a subfamily of Boraginaceae. However the placement and circumscription of Boraginaceae is still uncertain: it is unplaced at order level, and there is some prospect of it being split up again in future.

<span class="mw-page-title-main">Contact dermatitis</span> Inflammation from allergen or irritant exposure

Contact dermatitis is a type of acute or chronic inflammation of the skin caused by exposure to chemical or physical agents. Symptoms of contact dermatitis can include itchy or dry skin, a red rash, bumps, blisters, or swelling. These rashes are not contagious or life-threatening, but can be very uncomfortable.

Internal transcribed spacer (ITS) is the spacer DNA situated between the small-subunit ribosomal RNA (rRNA) and large-subunit rRNA genes in the chromosome or the corresponding transcribed region in the polycistronic rRNA precursor transcript.

<span class="mw-page-title-main">Quaternium-15</span> Salt used as a surfactant

Quaternium-15 is a quaternary ammonium salt that has been used as a surfactant and preservative. It acts as an antimicrobial agent because it slowly releases formaldehyde, which is a preservative with biocidal properties.

<i>Heliotropium</i> Genus of flowering plants in the borage family Boraginaceae

Heliotropium is a genus of flowering plants traditionally included in the family Boraginaceae s.l., but placed in the family Heliotropiaceae within the Boraginales order, by the Boraginales Working Group.. There are around 325 species in this almost cosmopolitan genus, which are commonly known as heliotropes. They are highly toxic to dogs and cats, as well as to humans.

Cocamidopropyl betaine (CAPB) is a mixture of closely related organic compounds derived from coconut oil and dimethylaminopropylamine. CAPB is available as a viscous pale yellow solution and it is used as a surfactant in personal care products and animal husbandry. The name reflects that the major part of the molecule, the lauric acid group, is derived from coconut oil. Cocamidopropyl betaine to a significant degree has replaced cocamide DEA.

<i>Phacelia crenulata</i> Species of plant

Phacelia crenulata is a species of flowering plant in the waterleaf family, Hydrophyllaceae. Its common names include notch-leaf scorpion-weed, notch-leaved phacelia, cleftleaf wildheliotrope, and heliotrope phacelia. Phacelia crenulata has an antitropical distribution, a type of disjunct distribution where a species exists at comparable latitudes on opposite sides of the equator, but not at the tropics. In North America, it is native to the southwestern United States as far east as Colorado and New Mexico, and Baja California and Sonora in Mexico. In South America, it is native to southern Peru, western Bolivia, and northern Chile.

<span class="mw-page-title-main">Boraginales</span> Order of flowering plants within the lammiid clade of eudicots

Boraginales is an order of flowering plants in the asterid clade, with a total of about 125 genera and 2,700 species. Different taxonomic treatments either include only a single family, the Boraginaceae, or divide it into up to eleven families. Its herbs, shrubs, trees and lianas (vines) have a worldwide distribution.

<span class="mw-page-title-main">Tetrazepam</span> Chemical compound

Tetrazepam is a benzodiazepine derivative with anticonvulsant, anxiolytic, muscle relaxant and slightly hypnotic properties. It was formerly used mainly in Austria, France, Belgium, Germany and Spain to treat muscle spasm, anxiety disorders such as panic attacks, or more rarely to treat depression, premenstrual syndrome or agoraphobia. Tetrazepam has relatively little sedative effect at low doses while still producing useful muscle relaxation and anxiety relief. The Co-ordination Group for Mutual Recognition and Decentralised Procedures-Human endorsed the Pharmacovigilance Risk Assessment Committee (PRAC) recommendation to suspend the marketing authorisations of tetrazepam-containing medicines across the European Union (EU) in April 2013. The European Commission has confirmed the suspension of the marketing authorisations for Tetrazepam in Europe because of cutaneous toxicity, effective from the 1 August 2013.

<i>Phacelia minor</i> Species of plant

Phacelia minor, with the common names Whitlavia and wild Canterbury bells, is a species of phacelia. It is native to Southern California and Baja California, where it grows in the Colorado Desert and the coastal and inland mountains of the Transverse-Peninsular Ranges, often in chaparral and areas recently burned.

<i>Wigandia caracasana</i> Species of evergreen flowering plant from Central America

Wigandia caracasana, the Caracus wigandia, is a species of ornamental plant. It is an evergreen that grows to a height of up to 3 metres (10 ft). It has purple flowers in large clusters from spring to autumn. Some sources treat it as a variety of the species Wigandia urens. Native to Central America, it is thought to be naturalized in southern California as a garden escape. It is commonly grown in gardens, and thrives best in a mixture of loam and peat. Cuttings in sand will strike if placed under glass and in heat.

Hoplestigma is a genus of flowering plants in the family Boraginaceae, although this is disputed, and it has been placed in its own family Hoplestigmataceae. Its two species are native to Cameroon, Gabon, Ivory Coast and Liberia in western tropical Africa.

<span class="mw-page-title-main">Boraginoideae</span> Subfamily of plants within the borage family (Boraginaceae)

Boraginoideae is a subfamily of the plant family Boraginaceae s.s, with about 42 genera. That family is defined in a much broader sense in the Angiosperm Phylogeny Group (APG) system of classification for flowering plants. The APG has not specified any subfamilial structure within Boraginaceae s.l.

<i>Phacelia pedicellata</i> Species of plant

Phacelia pedicellata is a species of flowering plant in the borage family, Boraginaceae. Its common names include specter phacelia and pedicellate phacelia. It is native to the southwestern United States and Baja California, where it can be found in several types of habitat, including creosote bush scrub and Joshua tree woodland.

<span class="mw-page-title-main">Iodopropynyl butylcarbamate</span> Chemical compound

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The Human maximisation test (HMT) is a test method for testing for contact allergens. It was first developed by Albert Kligman in 1966 and updated by Kligman and William Epstein in 1975. The first paper appeared 1966 and was a citation classic in 1985.

<i>Coldenia</i> Genus of flowering plants

Coldenia, named after C. Colden, is a monotypic genus of flowering plants traditionally included in the borage family, Boraginaceae sensu lato. It was assigned to the subfamily Ehretioideae, but molecular data revealed it to be more closely related to the genus Cordia, so that other authors placed in Cordioideae. Subsequently, it was placed in its own family, Coldeniaceae, within the Boraginales order, by the Boraginales Working Group.

Para tertiary butylphenol formaldehyde resin also known as p-tert-butylphenol-formaldehyde resin (PTBP-FR) or 4-(1,1-dimethylethyl) phenol is a phenol-formaldehyde resin found in commercial adhesives, and in particular in adhesives used to bond leather and rubber. It has broad usage in a large variety of industries and can be found in many household items and textile products, and in particular it is used in the manufacture of shoes.

References

  1. Phacelia Juss. Plants of the World Online . Retrieved 30 July 2024.
  2. 1 2 Gilbert, Cynthia; Dempcy, John; Ganong, Constance; Patterson, Robert; Spicer, Greg S (2005). "Phylogenetic Relationships within Phacelia subgenus Phacelia (Hydrophyllaceae) Inferred From Nuclear rDNA ITS Sequence Data". Systematic Botany. 30 (3): 627–634. doi:10.1600/0363644054782251. S2CID   85948949 . Retrieved 11 November 2020.
  3. 1 2 Gottschling, M; Hilger, H H; Wolf, M; Diane, N (2001). "Secondary Structure of the ITS1 Transcript and its Application in a Reconstruction of the Phylogeny of Boraginales". Plant Biology. 3 (6): 629–636. Bibcode:2001PlBio...3..629G. doi:10.1055/s-2001-19371. S2CID   260252906 . Retrieved 11 November 2020.
  4. Weigend, Maximilian; Luebert, Federico; Gottschling, Marc; Couvreur, Thomas L.P.; Hilger, Hartmut H.; Miller, James S. (2013). "From capsules to nutlets—phylogenetic relationships in the Boraginales". Cladistics. 30 (5): 508–518. doi: 10.1111/cla.12061 . PMID   34794245. S2CID   11954615.
  5. 1 2 3 4 Munz, Phillip A (1932). "Dermatitis produced by Phalecia (Hydrophyllaceae)". Science. 74 (1965): 194–195. doi:10.1126/science.76.1965.194.a. PMID   17795320. S2CID   239784768 . Retrieved 11 November 2020.
  6. 1 2 3 Reynolds, Gary W.; Epstein, William L. (1986). "Unusual contact allergens From plants in the family Hydrophyllaceae". Contact Dermatitis. 14 (1): 39–44. doi:10.1111/j.1600-0536.1986.tb01150.x. PMID   3948508. S2CID   30674931.
  7. Berry, C. Z., et al. (1962). Dermatitis venenata from Phacelia crenulata. Archives of Dermatology 85(6), 737-39.
  8. Edgar, Leith. "Service Botanist Discovers Native Colorado Flower". US Fish and Wildlife Service. Retrieved 11 November 2020.
  9. 1 2 Reynolds, Gary; Epstein, William; Terry, Diane; Rodriguez, Eloy (1980). "A potent contact allergen of Phacelia (Hydrophyllaceae)". Contact Dermatitis. 6 (4): 272–274. doi:10.1111/j.1600-0536.1980.tb04929.x. PMID   7398286. S2CID   42561206.

Further reading