"Annual 2–6 dm, pubescent with short glandular hairs, strongly but not unpleasantly aromatic; lvs oblong to ovate, the lower to 8 cm, sinuate-pinnatifid, the upper much smaller, pinnatilobate to entire; fls in numerous small lateral cymes along the main axes, forming long, slender, terminal infls; cal deeply 5-lobed, glandular-hairy, the segments rounded on the back; seeds horizontal or some of them erect, dull blackish, 0.6–0.8 mm wide, thick- lenticular, not margined; 2n=18. Native of Europe, established as a weed in waste places in our range. C. graveolens Willd., a native of sw. U.S. and trop. Amer., with the cal beset with yellow glands, the segments at maturity developing a conical tubercle on the back near the top, is rarely adventive in our range."
Aromatic annual, 5-40(-70) cm, densely hairy, most hairs stalked, glandular. Stems erect, usually with several ascending branches, main axis sometimes shorter than some of the branches. Leaves dull green, somewhat glaucous, blade 1-7 cm, elliptic to ovate in outline, cuneate to subcordate at base, obtuse at apex, pinnatifid with 2-5 broad lobes and several teeth on each side; lower leaves sometimes repand. Inflorescence elongate, main axis to 5 cm wide, terminal, composed of mostly leafless dense dichasial cymes, or axillary with smaller cymes. Terminal flowers solitary, larger and earlier flowering than lateral ones. Perianth segments 5, c. 1 x 0.5 mm, elliptic to ovate, acuminate, free to base, often not contiguous at base, herbaceous with membranous margins, often whitish in fruit, weakly keeled, with stalked glandular hairs on back. Stamens 1-5. Stigmas 2. Pericarp free. Seeds horizontal, black, 0.6-0.8 mm, round in outline, margin rounded often truncate in part; testa almost smooth.
10–50 cm hoch, aufrecht, ± verzweigt, ganze Pflanze dicht drüsig-klebrig, aromatisch, gelbgrün. Blätter buchtig-fiederteilig, mit ganzrandigen oder unregelmässig gezähnten Abschnitten, 1,5–3mal so lang wie breit, stieldrüsig. Blüten gestielt