Mustard Family – Brassicaceae (Cruciferae)[3] Lepidium densiflorum is an annual or biennial herb producing a short, erect, branching stem up to about 30 centimeters in height.

[4] It is more likely that the species is native to North America and it was first discovered in a rubbish dump in Turku, Finland, in the early 20th century, but its distribution has expanded and it was considered a noxious and invasive herb in many states.

[5][6] Basal rosette leaves, alternate, apex acute, base serrate, long stalked, with margin irregularly pinnately lobed; lower and middle cauline leaves have short stiped, margin sharply serrated, leaf blade 1-3 inches long, maximum 0.5 inches wide; upper leaves with narrow base are more linear, lobeless, sparsely serrated or subentire.

[4] Racemes, flowers are very small (less than 1/8 inches) but numerous and dense, elongating in fruiting stage; sepals ovate, about 1 mm long.

[8] Additionally, the 4-HBITC and SNB extracted from Lepidium densiflorum seeds have capacity to anti the oxidicability of DPPH and -OH.

[9] Moreover, the benzylic glucosinolates system was found in Lepidium densiflorum, which is related to both plant–pathogen interactions and human health.