Global description
Datura inoxia is a big sub-lignified bushy species. Stems, branches and leaves are fully pubescent, with simple and glandular hairs and its leaves usually entire, rarely serrated. The branches are usually purple in color. The fruit is pendulous, pubescent and covered with soft spines.
General habit
Datura innoxia is a robust herbaceous plant with upright growth habit, little or shortly branched from 0.3 to 1.5 m high.
Underground system
The plant has a taproot system
Stem
The stem is cylindrical, robust, purple in color, with short, dense and purplish white hairs, (glabrous in others Datura or scattered hairs in
D. stramonium).
Leaf
The leaves are simple, alternate, long-stalked. The Lamina is entire, broadly oval, 5 to 16 cm long and 4 to 9 cm wide. Wedged apex and truncate asymmetrical base, sinuous margin more or less serrated. Both sides are ash-green, finely pubescent.
Inflorescence
The flowers are solitary.
Flower
The big solitary flowers are tubular and erect. White corolla with green lines, 15 to 16 cm long, enlarged at the top with 10 small pointed lobes.
Fruit
The fruit is a hanging capsule beneath the curved peduncle (erected in
D. stramonium), 4 to 5 cm in diameter, bristling with slender and long thorns, including 4 loculus. Each loculus contains a large number (up to 200 per fruit) of small black seeds, 3 to 6 mm in diameter.