1. Polanisia. Stamens 8 or more. Pod many-seeded, not or scarcely stipitate.
2. Cleome. Stamens 6. Pod linear, many-seeded, long stipitate.
3. Cleomella. Stamens 6. Pod very short, rhomboidal, few-seeded, long-stipitate.
1. POLANÍSIA, Raf.
Petals with claws, notched at the apex. Stamens 8–32, unequal. Receptacle not elongated, bearing a gland behind the base of the ovary. Pod linear or oblong, veiny, turgid, many-seeded.—Fetid annuals, with glandular or clammy hairs. Flowers in leafy racemes. (Name from πολύς, many, and ἄνισος, unequal, points in which the genus differs in its stamens from Cleome.)
1. P. gravèolens, Raf. Leaves with 3 oblong leaflets; stamens about 11, scarcely exceeding the petals; style short; pod slightly stipitate.—Gravelly shores, from Conn. and W. Vt. to Minn. and Kan. June–Aug.—Flowers small (2–3´´ long); calyx and filaments purplish; petals yellowish-white.
2. P. trachyspérma, Torr. & Gray. Flowers larger (4–5´´ long), the stamens (12–16) long-exserted; style 2–3´´ long; pod sessile; seeds usually rough.—Iowa to Kan. and westward.
2. CLEÒME, L.
Petals entire, with claws. Stamens 6. Receptacle somewhat produced between the petals and stamens, and bearing a gland behind the stipitate ovary. Pod linear to oblong, many-seeded.—Our species a glabrous annual, with 3-foliolate leaves, leafy-bracteate racemes, and rose-colored or white flowers. (Name of uncertain derivation, early applied to some mustard-like plant.)
1. C. integrifòlia, Torr. & Gray. Calyx 4-cleft; petals with very short claws, leaflets narrowly lanceolate to oblong; bracts simple; pod oblong to linear, 1–2´ long, the stipe as long as the pedicel.—Minn. to Kan. and westward; N. Ill. Flowers showy; 2–3° high.