Family: Solanaceae
Datura stramonium
Citation:
L., Sp. Pl. 179 (1753).
Synonymy: D. tatula L., Sp. Pl. 179 (1753); D. stramonium L. vat. tatula (L.)Torrey, Flor. nth. middle US. 1:232 (1824), both for the lavender-flowered forms.
Common name: Common thornapple, purple-flowered thornapple.
Description:
Stout annual herb 0.2-1.2 m tall, glabrous or sparsely pubescent with non-glandular hairs; leaves rhombic or angularly ovate, 7-36 x 4-20 cm, coarsely and irregularly sinuate-dentate, some of the 3-5 lobes further toothed.
Flowers 6.5-8.5, rarely to 10 cm long; corolla white or pale-lavender with darker markings in the throat; lobes 5, separated by distinct sinuses; stigma below, level with or above the anthers.
Capsule erect, ovoid, 2-4.5 x 1.5-3.5 cm (excluding the spines), dehiscing by 4 entire valves; spines 100-200, slender, sharp, of variable length but evenly distributed, the longest less than half the length of the capsule; seeds black or grey, 2.5-4.5 mm long.
| Flowering branch, spreading corolla lobes, fruit and seed.
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Image source: fig. 562E in Jessop J.P. & Toelken H.R. (Ed.) 1986. Flora of South Australia (4th edn).
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Published illustration:
Purdie et al. (1982) Flora of Australia 29:fig. 51.
Distribution:
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S.Aust.: FR, EA, EP, NL, MU, YP, SL, KI, SE. W.Aust.; Qld; N.S.W.; Vic.; Tas. Probably native to North America though of uncertain origin and early widespread in Europe and western Asia; widely naturalised in temperate and warm-temperate regions of the world. Widespread weed of agricultural districts, usually in small, scattered populations, sometimes forming dense infestations, especially along perennial watercourses and in irrigated summer crops and pastures.
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Conservation status:
naturalised
Flowering time: summer.
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SA Distribution Map based
on current data relating to
specimens held in the
State Herbarium of South Australia
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Biology:
Toxic to stock, usually when fed as a contaminant in grain to poultry and pigs. Natural hybrids with D. ferox are known to occur.
Author:
Not yet available
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