Euphorbia royleana

Last updated

Euphorbia royleana
Gardenology.org-IMG 2778 hunt0903.jpg
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Malpighiales
Family: Euphorbiaceae
Genus: Euphorbia
Species:
E. royleana
Binomial name
Euphorbia royleana
Synonyms [1]

Euphorbia pentagonaRoyle

Euphorbia royleana is a species of flowering plant in the family Euphorbiaceae. [1] It is also known as Sullu spurge, and Royle's spurge. It is a succulent and almost cactus like in appearance, [2] although unrelated. It grows right across the Himalaya mountains from Pakistan, India, Bhutan, Myanmar, Nepal to western China. It prefers dry and rocky slopes between 1000 and 1500 meters, but has been found up to 2000 meters. Flowering and fruiting is in spring to early summer (March–July) and seeding is in June–October. It is used as a hedging plant in northern India and has medicinal uses. It is an outlier of an assembly of succulent tree spurges which are otherwise confined to South Africa, East Africa and Madagascar with another outlier in the caatinga of Brazil.

Contents

Description

Euphorbia royleana is a deciduous, cactus-like, shrub or small upright trees up to 2-5(-7) m high, which is armed with short prickles along its stems. It has a stout trunk and is glabrous except for the flowers (cyathia). The cyathia are small greenish-yellow, 3-4 appear in almost stalkless clusters in leaf axils. [3]

It has succulent segmented branches in whorls, which are green, 4-7(-8) cm thick, with branching from the upper parts. The stems have ribs 5(-7), angles more or less undulately winged with rounded teeth/tubercles. It has stout tap roots. [3]

The stems become leafless during hot and cold seasons and the leaves are alternate, apically clustered. They are produced in the moist season and soon fall. They are usually not seen when in flower. The leaf blade is fleshy oblanceolate, spathulate, or spoon-shaped 5-15 long, 1–4 cm wide and slightly succulent. The base is attenuate, the margin entire, and the apex obtuse or subtruncate. Veins are inconspicuous. The petiole is absent. [3]

Stipular spines are present in small in pairs on the edges on distinct shield, with broad flat faces between, 3–5 mm long. [3]

The cyathia, or false flowers, are greenish-yellow, almost stalkless, 3-4 in subterminal cymes in leaf axils. They are peduncle about 5 mm long. Cyathophylls as long as involucre, membranous. Involucre ca. 2.5 × 2.5 mm. Nectar-glands 5, transversely elliptic, dark yellow. Seed capsules are trigonous, 1-1.2 × 1-1.5 cm, light reddish brown, smooth and glabrous. The seeds themselves are 3-3.5 × 2.5–3 mm, brown, adaxially striate; caruncle absent. [3]

Medicinal use

It is a medicinal shrub used in Nepal locally known as siyuri or siudi. Its latex has purported molluscicidal properties.

Several researchers have noted that Euphorbia royleana has been observed growing near rock face collection sites of the Ayurvedic resin shilajit in the Himalayas. The plant is the likely origin of shilajit as its gum has a similar composition to the resin. [4] [5]

Related Research Articles

<i>Euphorbia</i> Genus of flowering plants in the spurge family Euphorbiaceae

Euphorbia is a large and diverse genus of flowering plants, commonly called spurge, in the family Euphorbiaceae.

<i>Euphorbia esula</i> Species of plant

Euphorbia esula, commonly known as green spurge or leafy spurge, is a species of spurge native to central and southern Europe, and eastward through most of Asia north of the Himalaya to Korea and eastern Siberia. It can also be found in some parts of Alaska.

<i>Euphorbia tithymaloides</i> Species of plant

Euphorbia tithymaloides is a perennial succulent spurge native to the tropical and subtropical areas of North America and Central America. An erect shrub, the plant is also known by the scientific name Pedilanthus tithymaloides. However, the genus Pedilanthus has been subsumed into the genus Euphorbia, and is more correctly known by its new name.

<i>Euphorbia milii</i> Species of plant

Euphorbia milii, the crown-of-thorns, Christ plant or Christ's thorn, is a species of flowering plant in the spurge family, Euphorbiaceae, native to Madagascar. The specifies commemorates Baron Milius, once Governor of Réunion, who introduced the species to France in 1821.

<i>Euphorbia lathyris</i> Flowering plant in the family Euphorbiaceae

Euphorbia lathyris, the caper spurge or paper spurge, is a species of spurge native to Asia in western China, Kirgizstan and Pakistan and introduced elsewhere.

<i>Euphorbia maculata</i> Species of plant

Euphorbia maculata, known as spotted spurge, prostrate spurge, milk purslane, or spotted sandmat, is a fast-growing annual plant in the family Euphorbiaceae. It is native to North America, where it is generally considered a common weed, it can be found in disturbed soils such as garden beds, along railroad tracks, and in the cracks of sidewalks. It has become a common introduced species throughout the world, including Europe, Japan, Korea, Australia, and New Zealand.

<i>Euphorbia corollata</i> Species of flowering plant

Euphorbia corollata is an herbaceous perennial plant in the family Euphorbiaceae that is native to North America. A common name for the species is flowering spurge. It has a milky sap that can cause skin and eye irritation in some people. It grows up to 1 m (3 ft) tall, with smooth stems and light green leaves arranged alternately or in whorls. Leaves are about 10 mm wide and 75 mm (3 in) long. Each stem terminates in a panicle 20 to 25 mm across. Flowers are about 6 mm across and consist of one pistillate and several staminate flowers surrounded by five white bracts - not petals but formed from the involucre at the base of the flowers. Flowering spurge blooms from June to September.

<i>Euphorbia misera</i> Species of flowering plant

Euphorbia misera is a semi-succulent shrub in the genus Euphorbia commonly known as the cliff spurge or coast spurge. A drought-deciduous shrub, it is typically found as a gnarled, straggly plant occupying seashore bluffs, hills and deserts. Like other members of its genus, it has a milky sap, which can be found exuding out of the light gray bark when damaged. The alternately-arranged leaves are round and folded in the middle, with small hairs on them. The "flowers" can be found blooming year-round, and are colored maroon or yellow in the center with 5 white to light-yellow petal-like appendages attached outside. This species is native to the Baja California peninsula and Sonora in Mexico, and the coast of Southern California in the United States, where it is a rare species. It is threatened in some localities by the development of its coastal habitat, which tends to be prime locations for high-end residential and commercial developments.

<i>Eriogonum flavum</i> Species of wild buckwheat

Eriogonum flavum is a species of wild buckwheat.

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

Euphorbiaceae, the spurge family, is a large family of flowering plants. In English, they are also commonly called euphorbias, which is also the name of the type genus of the family. Most spurges, such as Euphorbia paralias, are herbs, but some, especially in the tropics, are shrubs or trees, such as Hevea brasiliensis. Some, such as Euphorbia canariensis, are succulent and resemble cacti because of convergent evolution. This family has a cosmopolitan global distribution. The greatest diversity of species is in the tropics; however, the Euphorbiaceae also have many species in nontropical areas of all continents except Antarctica.

<i>Euphorbia obesa</i> Species of succulent flowering plant in the family Euphorbiaceae

Euphorbia obesa is a subtropical succulent species of flowering plant in the genus Euphorbia. It comes from the south-central Cape Provinces of South Africa. Sometimes referred to as the baseball plant.

<i>Euphorbia balsamifera</i> Species of flowering plant in the spurge family Euphorbiaceae

Euphorbia balsamifera is a flowering plant in the spurge family Euphorbiaceae. It is distributed in the Canary Islands and the western Sahara. It is the vegetable symbol of the island of Lanzarote. Euphorbia adenensis has been treated as a subspecies of this species.

<i>Euphorbia celastroides</i> Species of plant in the family Euphorbiaceae

Euphorbia celastroides is a flowering plant in the family Euphorbiaceae. It is referred to by the common name 'akoko by Hawaiians, and is a species of spurge closely related to the poinsettia. This species develops into a round-shape shrub. This species is endemic to the Hawaiian Islands.

<i>Euphorbia characias</i> Species of flowering plant in the spurge family Euphorbiaceae

Euphorbia characias, the Mediterranean spurge or Albanian spurge, is a species of flowering plant in the family Euphorbiaceae typical of the Mediterranean vegetation. It is an upright, compact evergreen shrub growing to 1.2 m tall and wide.

<i>Euphorbia aeruginosa</i> Species of succulent

Euphorbia aeruginosa is a succulent member of the spurge family native to South Africa. It grows as a small shrub, in sandy soils and in the fractures of rocks sending up multiple spiny blue-green photosynthetic stems. The plant produces yellow cyathia or flowering heads.

<i>Euphorbia schinzii</i> Species of flowering plant

Euphorbia schinzii is a perennial Southern African, dwarf flowering plant belonging to the family Euphorbiaceae. It is found on rocky slopes, growing among rocks. Variable in form, it occurs in South Africa, Zimbabwe, Botswana, Mozambique and Malawi, at an altitude between 100 and 1500 meters. The genus Euphorbia is large, with over 2000 species of extremely diverse size and appearance, and with a global distribution.

Euphorbia gregersenii, or Gregersen's spurge, is a plant in the family Euphorbiaceae: spurges.

<i>Scaevola plumieri</i> Species of flowering plant

Scaevola plumieri is a species of plant in the family Goodeniaceae which grows on coastal dunes in the tropics and subtropics.

<i>Euphorbia nivulia</i> Species of succulent flowering plant in the family Euphorbiaceae

Euphorbia nivulia is a subtropical succulent species of flowering plant in the family Euphorbiaceae. It is found in the Indian subcontinent and is commonly known as the leafy milk hedge, holy milk hedge or dog's tongue.

<i>Euphorbia neriifolia</i> Species of flowering plant

Euphorbia neriifolia, also known as Indian spurge tree, hedge Euphorbia, Oleander spurge and fleshy spurge, is a species of spurge native to India, which was originally described by Carl Linnaeus in 1753. Leaves from the plant are used in traditional kajal making in West Bengal, India.

References

  1. 1 2 "Euphorbia royleana Boiss". Plants of the World Online. The Trustees of the Royal Botanic Gardens, Kew. n.d. Retrieved September 4, 2020.
  2. Karsten and Schenk, Vegetationsbilder, Vol. 15 (1924) Plate 6 with caption
  3. 1 2 3 4 5 Encyclopedia of living forms "Euphorbia royleana" Text available under a CC-BY-SA Creative Commons Attribution License. www.llifle.com 14 Nov. 2005. 28 Oct 2016.
  4. Lal, VK; Panday, KK; Kapoor, ML (1988). "Literary Support To The Vegetable Origin Of Shilajit". Ancient Science of Life. 7 (3–4): 145–8. PMC   3336633 . PMID   22557605.
  5. "What is Shilajit and how its made?". Botanical Institute. 2021-02-15. Retrieved 2024-02-19.