Stems erect to ascending, branched at apex of taproot, 2.5-8 dm, somewhat viscid and farinose. Leaves nonaromatic; petiole 1-12 cm; blade triangular, 4.5-10 × 3-9 cm, base truncate to cordate, margins sinuate-dentate, apex acute to acuminate, sparsely farinose. Inflorescences: dense glomerules sessile on terminal spikes; spikes 5-19 cm; glomerules 3-5 mm diam., flowers developing at about same time; bracts leaflike, subtending lower glomerules, absent for over 1/2 inflorescence, triangular, broadly hastate, 1-3.5 × 0.8-4 cm, apex acuminate, base truncate to hastate, sparsely farinose. Flowers: perianth segments connate into 0.5-0.9 mm tube, lobes oblong or elliptic, 0.6-0.9(-1.1) × 0.4-1.2 mm, apex obtuse, rounded or truncate, scarcely abaxially keeled throughout, glabrous, not covering fruit at maturity; stamens (4-)5; stigmas 2. Achenes obovoid; pericarp adherent, ± smooth. Seeds obovoid or rotund, 1.5-2 mm in diam. , margins rounded; seed coat black, rugose.
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A herb. It keeps growing from year to year. It can grow 1 m tall. It can have many stems and form a mat. The leaf stalks are long. The leaves are sword shaped or arrowhead shaped. They are 10 cm long. There are sharp teeth along the edges. The flowers are in round clusters dotted along a flowering stalk. Each cluster has sveral flowers. Flat lobes of the flower cover the fruit.
Dry to moist slopes, ledges, plains, yellow-pine forests, yucca-juniper woodlands, chaparral and under oaks and willows at elevations of 30-1500 metres.
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It is a Mediterranean climate plant. It grows up to 2,000 m above sea level.