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Genus :


Family :



Annual or perennial herbs, rarely subshrubs, stems glabrous. Leaves simple, petiolate, alternate, lamina flat, entire or irregularly serrate or lobed. Inflorescence axillary or terminal panicles or spike-like, without bractlets. Flowers usually bisexual or some female, bracteate or ebracteate. Tepals usually 5, polypetalous or gamopetalous. Disk usually absent. Stamens 5 or fewer, filaments sometimes basally united, filiform or capillary, anthers oblong, without an appendage. Ovary superior, globose, 1-celled with solitary ovule, styles obscure or very short, terminal, stigmas 2(-5). Fruit a utricle, pericarp membranous or fleshy, adnate to seed or free, indehiscent.

Key to the species

Serial Key Reference
1a. Plant with simple and glandular hairs or glands, aromatic C. ambrosoides
1b. Plant glabrous to vesicular hairy (farinose), not aromatic but sometimes bad smelling C. album