[*][*][*] Pod short; the boat-shaped valves conduplicate or much flattened contrary to the narrow partition. Flowers white.
18. Capsella. Pod many-seeded, obcordate-triangular, wingless. Cotyledons incumbent.
19. Thlaspi. Pod several-seeded, obovate or obcordate, winged. Cotyledons accumbent.
20. Lepidium. Pod 2-seeded, flat, scale-shaped. Cotyledons incumbent or accumbent.
21. Senebiera. Pod 2-seeded, didymous; the valves rugose, separating at maturity from the little partition as 2 closed 1-seeded nutlets. Cotyledons incumbent, narrow.
SERIES II. Pods indehiscent, continuous or transversely jointed; joints 1-celled.
22. Cakile. Pod short, 2-jointed; joints 1-seeded. Cotyledons plane, accumbent.
23. Raphanus. Pod elongated, several-seeded, continuous, or constricted between the seeds and moniliform. Cotyledons conduplicate.
1. SELÈNIA, Nutt.
Pod large, oblong-elliptical, flat; the valves nerveless. Seeds in 2 rows in each cell, rounded, broadly winged; cotyledons accumbent; radicle short.—A low annual, with once or twice pinnatifid leaves and leafy-bracteate racemes of yellow flowers. (Name from σελήνη, the moon, with allusion to Lunaria, which it somewhat resembles in its pods.)