Cestrum diurnum

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Cestrum diurnum
Cestrum diurnum.jpg
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Solanales
Family: Solanaceae
Genus: Cestrum
Species:
C. diurnum
Binomial name
Cestrum diurnum
L.

Cestrum diurnum is a species of Cestrum , native to the West Indies. Common names include day-blooming cestrum, day-blooming jessamine, and day-blooming jasmine. Also known as Din ka Raja (king of the day), in Urdu and Hindi. The scent of this quick-growing and evergreen woody shrub, often used for screens and borders, is released by day. Cestrum diurnum is easily propagated from the seed, which it produces in abundance. [1]

Contents

Description

It is an erect evergreen woody shrub with numerous leafy branches. The branches, which are green and with well-marked white lenticels when young, fawn with age. The younger parts are covered with a very sparse glandular scruf. [1]

The leaves are simple, glabrous, entire, alternate, ex-stipulate, ovate-lanceolate in shape with obtuse apex and obtusely wedge-shaped below. They are dark green above and pale below and are generally 5 inches long by 1.5 inches wide. The leaves are petiolate with petioles of 0.5 inch length. [1]

The Inflorescence consists of a long axillary peduncle which bears short clusters of sweet white-smelling flowers, each cluster supported by a leaf-like bract. The individual flowers are sessile and may be with or without bracteoles. [1]

Calyx is gamo-sepalous, about 0.15 in long, somewhat puberulent, obtusely 5-ribbed and 5-lobed with obtuse, ciliate lobes. [1]

Corolla tube is narrowly infundibuliform, white, sweet-scented, about half-inch lobed with five lobes. The lobes are very obtuse and completely recurved when the flower is fully open. [1]

Stamens oblong, five in number, alternate with the corolla lobes, brown in colour, included. Filaments adnate to the tube, free for a very short distance. [1]

Ovary seated on a nectar-secreting disk. The style is filiform and glabrous. The stigmas are truncate-capitate. [1]

Cestrum diurnum has a black, nearly globular berry. [1]

Distribution

A native of the West Indies, it is widely cultivated in gardens throughout India. [1]

Medicinal uses

Leaves of Cestrum diurnum are reported as a sources of vitamin D3. [2] Aerial parts are also reported to have cytotoxic and thrombolytic activities. [3]

Toxicity

Cestrum diurnum is one of only three rangeland plants known to contain glycosides of the vitamin D metabolite 1,25-dihydroxycholecalciferol aka 1,25-OHD3. Consumption of glycosides of 1,25-OHD3 by grazing animals leads to a vitamin D toxicity resulting in calcinosis, the deposition of excessive calcium in soft tissues. [4]

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References

  1. 1 2 3 4 5 6 7 8 9 10 Bor & Raizada (1954)Some beautiful Indian Climbers and Shrubs, pp 130-131.
  2. Chennaiah S, Qadri SS, Rao SV, Shyamsunder G, Raghuramulu N. Cestrum diurnum leaf as a source of 1,25(OH)2 Vitamin D3 improves egg shell thickness. J Steroid Biochem Mol Biol. 2004 May;89-90(1-5):589-94.
  3. Khatun A, Chowdhury UK, Jahan A, Rahman M. Cytotoxic and thrombolytic activity of the aerial part of Cestrum diurnum L. (Solanaceae). Pharmacology Online, 2014; 1: 109-113.
  4. http://poisonousplants.ansci.cornell.edu/toxicagents/calglyco.html Accessed June 2021, Cornell Dept. of Agriculture and Life Sciences: Department of Animal Science: "Plants Poisonous to Livestock"