Delphinium glaucum

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Delphinium glaucum
Delphiniumglaucum.jpg
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Ranunculales
Family: Ranunculaceae
Genus: Delphinium
Species:
D. glaucum
Binomial name
Delphinium glaucum
Synonyms
  • Delphinium brownii
  • D. scopulorum

Delphinium glaucum, known by the common names Sierra larkspur, mountain larkspur, and glaucous larkspur, is a species of wildflower in the genus Delphinium , which belongs to the buttercup family, Ranunculaceae. It is native to western North America from Arizona to Alaska, growing in moist mountainous environments such as riverbanks and meadows.

Contents

Although Ewan, in his survey of North American Delphinium, [1] treated D. glaucum and D. brownii as two separate species, some taxonomists now seem inclined to treat D. brownii as a local form of D. glaucum. [2] [3] However, the matter does not yet appear to be completely resolved. [4] [5]

D. glaucum is a "tall" larkspur, which sprouts from one to several tall, stout, pale green erect stems which may approach 3 metres (9.8 ft) in height. The lobed leaves are generally found only at the base of the plant. The top of the stem is a large inflorescence which may itself be over 1 metre (3.3 ft) long. It usually contains over fifty widely spaced flowers, with each flower on a pedicel a few centimeters long. The sepals are flat and extend to the sides or point forward. The sepals and petals are dark blue to deep purple, although the top two petals may be lighter in color to almost white. They may be somewhat wrinkly. The spur is about two centimeters long.

Larkspurs have long been associated with livestock poisoning in North America, [2] and D. glaucum (under the name D. brownii) has caused problems in the rangelands of Alberta, in western Canada. [6]

Chemical studies

The earliest phytochemical research on D. glaucum (then known as D. brownii ) was that of Richard Manske, working at the National Research Laboratories in Ottawa, Canada, in 1938, who isolated an alkaloid that he was unable to purify adequately, and the common plant-sugar, mannitol. [7] A few years later, John Goodson, at the Wellcome Chemical Research Laboratories in London, England, isolated what he believed to be the same alkaloid, in purer form, from seeds of Delphinium elatum , and named it "methyl-lycaconitine". [8]

Further work to identify the chemical constituents of D. glaucum (still called D. brownii) was carried out by Michael Benn and his co-workers at the National Research Council laboratories in Ottawa, Canada in 1963. [9] These chemists confirmed the presence of methyllycaconitine in the plant, and also isolated another, structurally related diterpenoid alkaloid, which they named browniine.

Delphinium glaucum (still under the name D. brownii) was studied again by Mike Benn's research group, at the University of Calgary, in Canada, with the objective of identifying the compounds responsible for its toxicity. [6] These researchers again found methyllycaconitine and browniine in the plant, but also a closely related alkaloid, browniine-14-acetate, as well as the alkaloid magnoflorine, belonging to the aporphine class. Of these, methyllycaconitine was found to be the most toxic.

Related Research Articles

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

Delphinium is a genus of about 300 species of annual and perennial flowering plants in the family Ranunculaceae, native throughout the Northern Hemisphere and also on the high mountains of tropical Africa. The genus was erected by Carl Linnaeus.

<i>Consolida ajacis</i> Species of plant

Consolida ajacis is an annual flowering plant of the family Ranunculaceae native to Eurasia. It is widespread in other areas, including much of North America, where it is an introduced species. It is frequently grown in gardens as an ornamental for its spikes of blue, pink or white flowers. It may reach a meter in height. Since the aerial parts and seeds of C. ajacis have been found to contain diterpenoid alkaloids, including the highly toxic methyllycaconitine, the plants should be considered as poisonous.

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

Methyllycaconitine (MLA) is a diterpenoid alkaloid found in many species of Delphinium (larkspurs). In common with many other diterpenoid alkaloids, it is toxic to animals, although the acute toxicity varies with species. Early research was focused on identifying, and characterizing the properties of methyllycaconitine as one of the principal toxins in larkspurs responsible for livestock poisoning in the mountain rangelands of North America. Methyllycaconitine has been explored as a possible therapeutic agent for the treatment of spastic paralysis, and it has been shown to have insecticidal properties. Most recently, it has become an important molecular probe for studying the pharmacology of the nicotinic acetylcholine receptor.

<i>Delphinium nudicaule</i> Species of plant

Delphinium nudicaule, known by the common names canyon larkspur, red larkspur, orange larkspur, and canyon delphinium, is a flowering herbaceous perennial plant in the buttercup family Ranunculaceae. It is native to low-elevation canyons and slopes, foothills, and mountain ranges of California, US, from the Sierra Nevada to the California Coast Ranges, and of Oregon. It grows below 6,500 feet (2,000 m).

<i>Lebeckia</i> Genus of legumes

Lebeckia is a genus of plants in the family Fabaceae native to the fynbos of South Africa. Several members of Lebeckia were recently transferred to other genera. Members of Lebeckia are known to produce pyrrolizidine alkaloids, including ammodendrine, lebeckianine, and lupanine. The genus was named by Carl Thunberg for his student Heinrich Julius Lebeck.

<i>Delphinium cardinale</i> Species of plant

Delphinium cardinale is a species of larkspur known by the common names scarlet larkspur and cardinal larkspur. This wildflower is native to California and Baja California, where it grows on coastal, inland, and desert chaparral slopes, such as the Colorado Desert, and the Peninsular and Transverse Ranges. The presence of diterpenoid alkaloids, probably including the highly toxic methyllycaconitine, in above-ground parts of D. cardinale means that they are likely to be toxic if ingested.

<span class="mw-page-title-main">Crotalarieae</span> Tribe of legumes

Crotalarieae is a tribe of flowering plants belonging to the family Fabaceae. It includes rooibos (Aspalathus linearis), harvested for sale as a tisane.

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

Delphinine is a toxic diterpenoid alkaloid found in plants from the Delphinium (larkspur) and Atragene genera, both in the family Ranunculaceae. Delphinine is the principal alkaloid found in Delphinium staphisagria seeds – at one time, under the name stavesacre, a very well known herbal treatment for body lice. It is related in structure and has similar effects to aconitine, acting as an allosteric modulator of voltage gated sodium channels, and producing low blood pressure, slowed heart rate and abnormal heart rhythms. These effects make it highly poisonous. While it has been used in some alternative medicines, most of the medical community does not recommend using it due to its extreme toxicity.

<span class="mw-page-title-main">Podalyrieae</span> Tribe of legumes

The tribe Podalyrieae is one of the subdivisions of the plant family Fabaceae.

<span class="mw-page-title-main">Sophoreae</span> Tribe of legumes

The tribe Sophoreae is one of the subdivisions of the plant family Fabaceae. Traditionally this tribe has been used as a wastebasket taxon to accommodate genera of Faboideae which exhibit actinomorphic, rather than zygomorphic floral symmetry and/or incompletely differentiated petals and free stamens. Various morphological and molecular analyses indicated that Sophoreae as traditionally circumscribed was polyphyletic. This led to a re-circumscription of Sophoreae, which resulted in the transfer of many genera to other tribes. This also necessitated the inclusion of two former tribes, Euchresteae and Thermopsideae, in the new definition of Sophoreae. Tribe Sophoreae, as currently circumscribed, consistently forms a monophyletic clade in molecular phylogenetic analyses. The Sophoreae arose 40.8 ± 2.4 million years ago.

<i>Delphinium pavonaceum</i> Species of flowering plant

Delphinium pavonaceum is a species of flowering plant in the buttercup family known by the common name peacock larkspur. It is endemic to Oregon in the United States, where it is limited to the Willamette Valley.

<i>Delphinium tricorne</i> Species of flowering plant

Delphinium tricorne, known by the common names dwarf larkspur or spring larkspur, is a species of flowering plant in the Ranunculaceae (buttercup) family. It is native to the central and eastern United States, where it is the most common Delphinium found.

<i>Delphinium barbeyi</i> Species of plant

Delphinium barbeyi is a species of flowering plant in the buttercup family known by the common names subalpine larkspur, tall larkspur, and Barbey's larkspur. It is native to the interior western United States, where it occurs in the states of Arizona, Colorado, New Mexico, Utah, and Wyoming.

<i>Delphinium exaltatum</i> Species of flowering plant

Delphinium exaltatum, known by the common name tall larkspur, is a species of flowering plant in the genus Delphinium, part of the buttercup family. Other Delphinium species are also commonly known as tall larkspur, such as Delphinium barbeyi. D. exaltatum is native to the central and eastern United States, where it can be found in Kentucky, Maine, Ohio, Pennsylvania, Maryland, West Virginia, Virginia, North Carolina, Alabama, Tennessee, and Missouri.

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

Sibiricine is a bioactive isoquinoline alkaloid isolated from Corydalis crispa (Fumariaceae), which is a Bhutanese medicinal plant from the Himalayas.

<i>Delphinium elatum</i> Species of plant

Delphinium elatum is a species of flowering plant in the buttercup family Ranunculaceae, known by the common name alpine delphinium, guardian lavender, or candle larkspur. It is native to temperate Asia and Europe, it is an erect herbaceous perennial growing to 1.8 m (5.9 ft), with deeply divided leaves. It produces spikes of blue or purple flowers in summer.

<span class="mw-page-title-main">Genistoids</span> Clade of legumes

The Genistoids are one of the major radiations in the plant family Fabaceae. Members of this phylogenetic clade are primarily found in the Southern hemisphere. Some genera are pollinated by birds. The genistoid clade is consistently resolved as monophyletic in molecular phylogenetic analyses. It is estimated to have arisen 56.4 ± 0.2 million years ago. A node-based definition for the genistoids is: "the MRCA of Poecilanthe parviflora and Lupinus argenteus." One morphological synapomorphy has been tentatively identified: production of quinolizidine alkaloids. Some genera also accumulate pyrrolizidine. A new genus, to be segregated from Clathrotropis, has also been proposed to occupy an undetermined position within the genistoid clade.

<span class="mw-page-title-main">Genisteae</span> Tribe of legumes

Genisteae is a tribe of trees, shrubs and herbaceous plants in the subfamily Faboideae of the family Fabaceae. It includes a number of well-known plants including broom, lupine (lupin), gorse and laburnum.

<i>Delphinium geyeri</i> Species of flowering plant

Delphinium geyeri is a species of plant in the Ranunculaceae family that is often called by the common names plains larkspur and foothills larkspur. It is infamous for causing the deaths of cattle grazing in the spring because it is especially poisonous before it flowers and so it is also called poisonweed by ranchers. It is a medium to tall plant that has very striking blue flowers and is occasionally grown in native plant gardens for this reason. It grows mainly in Wyoming with large population in northern Colorado, northeastern Utah, and parts of Nebraska.

<i>Delphinium menziesii</i> Species of plant

Delphinium menziesii, the Puget Sound larkspur, northern dwarf larkspur, or Menzies' larkspur, is a species of flowering plant in the family Ranunculaceae. It is native to British Columbia, Washington, and Oregon. A perennial reaching 75 cm (30 in), it is hummingbird pollinated.

References

  1. J. Ewan (1945), University of Colorado Studies, Series D. Physical and Biological Sciences2 55–244.
  2. 1 2 J. D. Olsen and G. D. Manners (1989). In Toxicants of Plant Origin, Vol. 1, (P. R. Cheeke, Ed.), pp. 291–326, Boca Raton: CRC Press.
  3. J. Looman (1984) Can. Field-Nat.98 345-361. (Accessed through: https://www.biodiversitylibrary.org/item/89187)
  4. K. E. Panter et al. (2002) Biochem. Syst. Ecol.30 113–128.
  5. S. E. Welsh and M. H. Ralphs (2002) Biochem. Syst. Ecol.30 103–112.
  6. 1 2 V. N. Aiyar, M. H. Benn, T. Hanna, J. Jacyno, S. H. Roth and J. L. Wilkens (1979) Experientia35 1367–1368.
  7. R. H. F. Manske (1938) Can. J. Chem., Sect. B16 57-60.
  8. J. A. Goodson (1943) J. Chem. Soc. 139-141.
  9. M. H. Benn, M. A. M. Cameron and O. E. Edwards (1963) Can. J. Chem. 41 477-482.

Further reading

Ishii, Hiroshi S.; Harder, Lawrence D. (July 2012). "Phenological associations of within- and among-plant variation in gender with floral morphology and integration in protandrous Delphinium glaucum". Journal of Ecology. 100 (4): 1029–1038. doi:10.1111/j.1365-2745.2012.01976.x.