8. Lesquerella. Pod globular-inflated, about 4-seeded; valves nerveless. Cotyledons accumbent. Flowers yellow. 9. Camelina. Pod obovoid, many-seeded; valves 1-nerved; style slender. Cotyledons incumbent. Flowers yellow. 10. Subularia. Pod ovoid or globular, few-seeded, valves 1-nerved; style none. Cotyledons long, folded transversely. Flowers white. Dwarf stemless aquatic. [+][+] Pod linear (or oblong or even globular in n. 10). [++] Cotyledons accumbent. 11. Nasturtium. Pod often short; valves strongly convex, nerveless. Seeds small, in 2 rows in each cell. Flowers yellow or white. 12. Barbarea. Pod somewhat 4-sided; valves strongly 1-nerved. Seeds in 1 row. Flowers yellow. [++][++] Cotyledons incumbent or partially so. 13. Hesperis. Pod terete, elongated; stigma-lobes narrow, erect. Flowers large, purple. 14. Erysimum. Pod 4-sided; valves strongly 1-nerved; stigma broadly 2-lobed. Pubescence of appressed 2--3-parted hairs. Flowers yellow. 15. Sisymbrium. Pod angled or teretish; valves 1--3-nerved; stigma small. Flowers yellow or white, small. 16. Thelypodium. Pod teretish; valves 1-nerved; stigma entire. Cotyledons obliquely incumbent. Flowers rose-color. Leaves auricled. [++][++][++] Cotyledons conduplicate. 17. Brassica. Pod beaked or pointed beyond the end of the valves, or tipped with a rigid style, nearly terete, or 4-sided. Flowers yellow or whitish. [*][*][*] 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.) 1. S. aùrea, Nutt. Lobes of the simply pinnatifid leaves entire or toothed; pod ½´ long, on elongated spreading pedicels, beaked by the long slender style.--Mo. and Kan. to Tex. 2. LEAVENWÓRTHIA, Torr.