Datura stramonium – Jimsonweed
Datura stramonium, known as jimsonweed, is the most widespread and easiest to cultivate species of the genus Datura from the nightshade family (Solanaceae). It is an annual plant with trumpet-shaped flowers and spiny seed pods, valued as an impressive, though poisonous, decoration for naturalistic and ethnobotanical gardens.
Synonyms and nomenclature
The species was described by Linnaeus (1753). The Kew POWO database lists about 35 synonyms for it; the most common include:
- Stramonium vulgare Moench
- Datura tatula L.
- Datura inermis Juss. ex Jacq.
- Datura bertolonii Parl. ex Guss.
- Datura parviflora Salisb.
- Stramonium spinosum Lam.
In English, the plant is called jimsonweed, thornapple, devil's snare, and devil's trumpet; the Polish name is bieluń dziędzierzawa. The variety with purple flowers is sometimes distinguished as Datura tatula.
Origin and appearance
The origin of the species is debated – POWO indicates Mexico, though literature varies. This jimsonweed has the widest range: as an invasive weed, it has established itself in temperate and tropical zones almost worldwide, including Poland. The plant is upright, heavily branched, forming a shrub 60–150 cm tall, with a smooth stem ranging from green to purple and a taproot.
Leaves (8–20 cm) are ovate, thickly and unevenly toothed or lobed, with an unpleasant smell when crushed. Flowers are trumpet-shaped, upright, smaller than other jimsonweeds (6–10 cm), white or – in the tatula variety – pale violet. The fruit consists of upright, ovate capsules densely covered with sharp spines, splitting open with four valves.
Frost resistance and cultivation
This is the most climate-tolerant jimsonweed – it grows and fruits well even in cooler conditions and can self-seed in Poland. It is cultivated as an annual by sowing seeds after the last frost. It prefers a sunny position and fertile, nitrogen-rich soil but tolerates ruderal and poor soils and is very drought-resistant.
Cultivation from seeds
The seeds have a hard shell, so soaking them for about a day in warm water helps. They are light-dependent – sow them shallowly, without covering them deeply with soil, at a temperature of 20–25°C. Germination usually occurs within 2–4 weeks. This is the easiest of the daturas to germinate and grow – it grows readily and can self-seed under favorable conditions.
Safety – poisonous plant
The entire plant is highly poisonous. It contains tropane alkaloids – hyoscyamine, scopolamine, and atropine – and is one of the most common causes of plant poisoning. Datura stramonium is purely an ornamental and ethnobotanical plant; it should be kept away from children and animals, and caution should be exercised when harvesting seeds.
Uses and who it is for
This is an ornamental, collector’s, and ethnobotanical plant – its fragrant, evening-opening flowers and distinctive spiny seed pods are suitable for naturalistic gardens and enthusiasts of unusual plants. Due to its ease of cultivation, it is also accessible to less experienced gardeners, but it is not suitable for homes and gardens with small children or pets.
Interesting facts
The English name jimsonweed comes from “Jamestown weed” – from the poisoning of soldiers in Jamestown, Virginia, in 1676, who consumed this plant. Despite its strong toxicity, Datura stramonium is a source of alkaloids used pharmaceutically in parasympatholytic drugs.
Summary
Datura stramonium is the easiest and most versatile of the daturas – its rapid growth from seeds, tolerance of cooler climates, and striking, fragrant flowers make it a rewarding, though poisonous, addition to a naturalistic garden. It requires only sunlight and a bit of caution, and it rewards with lush, long-lasting blooms.
