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5. Acourtia microcephala de Candolle in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 7: 66. 1838.
Perezia microcephala (de Candolle) A. Gray
Plants 60–120 cm. Leaves cau-line; sessile; blades oblong-ovate to elliptic, 5–15 cm, bases cordate, clasping, auriculate, margins spinulose-denticulate, faces densely glandular-scabrid. Heads in paniculiform arrays. Involucres turbinate to campanulate, 6–8(. 10+) mm. Phyllaries in 3–4 series, linear to oblanceolate, apices acute to acuminate or mucronate, margins and abaxial faces glandular-hairy. Receptacles alveolate, glandular-hairy. Florets 10–20; corollas lavender-pink, 6–12 mm. Cypselae cylindric, 1.5–6 mm, bristly glandular-puberulent; pappi tawny, 6–10 mm. 2n = 54.
Flowering May–Jul. Gravel and caliche soils in scrub oak, oak woodlands, and chaparral; 60–1300 m; Calif.; Mexico (Baja California).
In the flora, Acourtia microcephala is restricted to the dry areas of California from Monterey to San Diego counties and on the Channel Islands.
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