UPDATED 22/07/2020 Identification sheet Do not confuse Jimsonweed with New Zealand spinach Jimsonweed New Zealand spinach Datura stramonium L. Tetragonia tetragonoides (Pall.) Kuntze (Solanaceae) (Aizoaceae) Foul-smelling annual plant measuring Annual plant growing to a height of 20- from 40 cm to over 1 m tall 50 cm Upright stem ’ Trailing or climbing stem Seedling has ’ Fleshy seedling narrow linear- with elongated lanceolate cotyledons, elliptical cotyledons, first leaves are oval first leaves are and elongated with already triangular- smooth edges diamond shaped Large leaves (3 ’ Leaves (2-11 cm) to 24 cm) with an are triangular- oval outline, and diamond shaped, large uneven smooth-edged, teeth ending in succulent, fleshy and sharp tips brittle, dark green above, pale green below Jimsonweed New Zealand spinach Datura stramonium L. Tetragonia tetragonoides (Pall.) Kuntze (Solanaceae) (Aizoaceae) Solitary flowers in the leaf axils, ’ Flowers inserted in the leaf axils, large (6-11 cm), white and trumpet- solitary or in groups of 2-3, bisexual, shaped yellowish-green, inconspicuous ’ ’ ’ Fruit: upright, thorny ’ Conical or globular capsule, about 5 fruit 2.5-12.5 mm in cm long, opening length, hard and through 4 valves indehiscent, with (3-)4(-5) horns Seeds are black-brown to ’ greyish, L: 3-4 mm; W: 2-2.5 mm, with a pitted wrinkled wall and ’ Soft seeds with orange-brown +/- kidney-shaped seed coat, L: 2.5-3 mm; W: 2 mm, pear-shaped Very common Species found throughout Species only naturalised in areas where France, expanding! on the coast (Brittany, the soil has been Atlantic coast, Var, disturbed: Corsica); elsewhere in cultivated fields, France it is rare and only wasteland, grown in vegetable © FCBN © gardens, FCBN © patches roadsides and riverbanks On coastal sands and rocks More information on Datura stramonium: https://theconversation.com/pourquoi-et-comment-le- datura-contamine-t-il-les-denrees-alimentaires-113772 Produced by Guillaume Fried (ANSES-LSV), Bruno Chauvel, Annick Matéjicek & Xavier Reboud (INRAE) 07/2020 Photo credits: G. Fried except 2': K. Ziarnek/CC BY-SA and 5' to 6': A. Matéjicek.