Perennial with erect glabrous or sparsely hairy stems up to 50 cm, branched above. Basal leaves up to 10 cm, long-petiolate, oblanceolate to oblong, toothed or pinnately lobed; upper cauline leaves linear or linear-spathulate. Sepals 0.5-1.4 mm, narrowly white-margined above the middle; petals up to 1½ times as long as the sepals, with obovate-spathulate limb. Pedicels 2.5-4 mm in fruit. Silicula 2.5-4 x 1.5-3 mm, acute to acuminate, not notched, not or scarcely winged; style c. 0.2 mm, exceeding the notch.
Lepidium graminifolium is a PERENNIAL growing to 0.1 m (0ft 4in). It is in flower from June to July, and the seeds ripen from July to August. The species is hermaphrodite (has both male and female organs) and is pollinated by Insects.
Suitable for: light (sandy), medium (loamy) and heavy (clay) soils. Suitable pH: acid, neutral and basic (alkaline) soils. It can grow in semi-shade (light woodland) or no shade. It prefers dry or moist soil.
How to get rid of:
Several herbicides available in commerce will control peppergrass weeds. You may have to apply them several times a year for several years to get rid of a dense buildup.