Lepidium africanum (Burm.f.) DC.

Global description
 
Lepidium africanum is a biennial to short life perennial herb, glabrous or slightly pubescent, highly branched in its upper part, reaching up to 75 cm high. The leaves are alternate, single, arranged in a rosette at the base and spacing out along the stem. They are all similar, narrow obovate, with serrated margin. Flowers, small, white, are grouped in terminal clusters that extend during fructification. The fruit is a flattened silicle, oval or oblong, slightly indented. It contains 2 yellowish brown or reddish brown seeds.
 
General habit
 
Biennial to short-lived perennial plant, highly branched in its upper part, measuring 15 to 75 cm high.
 
Underground system

Tap root
 
Stem
 
The stem is glabrous to finely papillose-puberulous.
 
Leaf
 
The leaves are alternate and simple. The leaves of the base, with ciliated petiole, are arranged in rosette. They can reach 10 cm long. Their lamina is narrow obovate, serrated with larger tines near the apex, glabrous or puberulous. The stem leaves are similar, but smaller, the upper ones less serrated.
 
Inflorescence
 
The flowers are grouped in terminal clusters that extend during fructification.
 
Flower
 
Pedicel erect or arched, usually covered with small scattered hairs, measuring 1.5 to 3.5 mm in the fruit. Oblong sepals, 0.6 to 0.9 mm long, are tinted purple. Linear-oblong petals, 0.2 to 0.5 mm long, are white in colour. The stamens are 2 in number. The nectaries are small, triangular form.
 
Fruit
 
The fruit is a flattened silicle,      1.8 to 2.7 mm long and 1.3 to 1.9 mm wide, large oval to oval oblong, slightly indented, with the style not exceeding the notch. It contains 2 seeds.
 
Seed
 
Seed, 1 to 1.3 mm long, 0.5 to 0.7 mm wide, is yellowish brown or reddish brown in colour.

https://www.gbif.org/fr/species/5376530