Habit: Lepidium filicaule grows as an annual herb, often prostrate, to 15 cm in height when in flower/fruit. Plants can be simple and unbranched or branched toward the base. The leaves sparse toward the base, to 6 cm in length 2 cm wide (usually smaller and narrower), pinnatifid to lobed, narrowing to the petiole. Leaves along the stem smaller and serrulate than basal leaves. Vegetation is sparsely hirsute.
The complete, perfect, actinomorphic flowers are in terminal and axillary racemes up to 10 centimeters in length. The calyx has 4 unfused, green, caducous sepals. The corolla has 4 unfused, small (sometimes absent) petals. There are 2 stamens and 4 staminodes/glands. The superior ovary with 2 locules separated by a narrow replum. The fruit is a flat, oval, 2 seeded silicle with a notched sinus at the apex.
Habitat: Lepidium filicaule grows in clay like soil near coastlines.
Distribution: Lepidium filicaule is endemic to the Lucayan Archipelago known only to occur in the Turks and Caicos Islands.
Medicinal/Cultural/Economic Usage: Lepidium filicaule is not known to be used medicinally.