Caucasian belladonna (Atropa caucasica)

Caucasian deadly nightshade

Atropa caucasica - Caucasian Belladonna Taxonomy and Description

Inhabiting the damp forests and clearings of the Caucasus, this perennial herb plays a significant role in pharmacological history. It represents a close relative of the common deadly nightshade and is often classified as a subspecies of the latter. Botanists distinguish it by its glabrous stems and slightly paler blossoms.

This species contains a high concentration of tropane alkaloids, making it extremely toxic. It has been used as a substitute for European belladonna in medicinal preparations. The plant is legally protected in several regions of its native range due to habitat loss.

Taxonomy

  • ∟ царство Plantae
  • ∟ division Tracheophytes (Vascular Plants)
  • ∟ subdivision Spermatophytes (Seed plants)
  • ∟ Angiosperms
  • ∟ mesangiosperms (Core angiosperms)
  • ∟ eudicots
  • ∟ asterids
  • ∟ order Solanales
  • ∟ family Solanaceae
  • ∟ subfamily Solanoideae
  • ∟ tribe Hyoscyameae
  • ∟ genus Atropa (Belladonna)
  • ∟ species Atropa caucasica (Caucasian belladonna)

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Morphology

This robust perennial herb typically grows to a height of 90 to 120 centimeters. The erect stems are glabrous, lacking the sticky glandular hairiness found in the closely related European belladonna. Its leaves are broad, ovate, and arranged alternately on the upper parts of the stem.

The bell-shaped flowers of this species are purple or brownish-purple, though notably paler than those of Atropa belladonna. The fruit is a glossy, black, highly poisonous berry that develops in late summer. It contains multiple reniform seeds embedded in a dark, sweetish pulp.

Flowering season

Late spring to mid-summer, typically from May to July

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Applications

Due to its high concentration of tropane alkaloids, particularly atropine and hyoscyamine, this plant is used exclusively in medicine and pharmacology. Historically, raw extracts were collected for industrial alkaloid extraction. Traditional medical preparations utilize the leaves and roots to produce antispasmodic and analgesic pharmaceuticals.

Interesting facts

  • This species contains a higher concentration of active alkaloids than the classic European belladonna, making it even more toxic.
  • It is considered by some taxonomists to be a subspecies of Atropa belladonna rather than a separate distinct species.
  • The lack of sticky glandular hairs on the stem is a primary botanical feature used to distinguish it from the common deadly nightshade.

Geography of distribution

  • Caucasus
  • Western Asia

Sources

  • Plants of the World Online (POWO)
  • World Flora Online (WFO)
  • Tropicos (Missouri Botanical Garden)

Technical Information

External Databases: GBIF, POWO, Tropicos

See also

Deadly Nightshade

Deadly Nightshade

Atropa bella-donna

Atropa bella-donna, commonly known as deadly nightshade, is a highly toxic perennial herbaceous plant in …

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Yellow belladonna

Yellow belladonna

Atropa lutea

A rare, yellow-flowered perennial herb related to the deadly nightshade, belonging to the Solanaceae family.

Read more →