Habit: Annual, taprooted, glabrous.
Stem: decumbent to erect, generally loosely branched.
Leaf: sessile or petioled; blade oblong to triangular-ovate, pinnately or ternate-pinnately dissected or compound, segments or leaflets generally thread-like to linear.
Inflorescence: umbels compound or some simple; bracts, bractlets 0; rays few; rays, pedicels spreading.
Flower: calyx lobes 0; petals oblong, white, tips not incurved.
Fruit: elliptic to narrowly ovate, compressed side-to-side, glabrous [hairy]; ribs +- equal, thread-like to prominent and corky; oil tube 1 per rib-interval; fruit axis shallowly notched.
Seed: face flat.
Species In Genus: 3 species: South America, 1 +- worldwide aggressive weed.
Etymology: (Greek: circular seed)
Note: "Ciclospermum" in TJM (1993).
Jepson eFlora Author: Lincoln Constance & Margriet Wetherwax
Index of California Plant Names (ICPN; linked via the Jepson Online Interchange)
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