Acourtia microcephala

de Candolle in A. P. de Candolle and A. L. P. P. de Candolle

in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 7: 66. 1838.

Synonyms: Perezia microcephala (de Candolle) A. Gray
Treatment appears in FNA Volume 19. Treatment on page 74. Mentioned on page 73.

Plants 60–120 cm. Leaves cauline; 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.


Phenology: Flowering May–Jul.
Habitat: Gravel and caliche soils in scrub oak, oak woodlands, and chaparral
Elevation: 60–1300 m

Distribution

V19-10-distribution-map.gif

Calif., Mexico (Baja California)

Discussion

In the flora, Acourtia microcephala is restricted to the dry areas of California from Monterey to San Diego counties and on the Channel Islands.

Selected References

None.

Lower Taxa

None.

... more about "Acourtia microcephala"
glandular-hairy +
scarious +
paniculiform +
indeterminate +  and determinate +
Beryl B. Simpson +
de Candolle in A. P. de Candolle and A. L. P. P. de Candolle +
rounded +  and elongate +
auriculate +  and cordate +
compound +  and simple +
oblong-ovate;elliptic +
5 cm50 mm <br />0.05 m <br /> (15 cm150 mm <br />0.15 m <br />) +
ribbed;smooth +
less barbellate +  and nearly smooth +
white +  and tan +
lavender-pink +
0.6 cm6 mm <br />0.006 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
ribbed +  and not beaked +
glandular-puberulent +  and bristly +
cylindric +
Calif. +  and Mexico (Baja California) +
60–1300 m +
stipitate-glandular +, glabrous +  and hirtellous +
glandular-scabrid +
pistillate +, staminate +  and neuter +
fertile +  and bisexual +
winged +  and beaked +
dispersed +
Gravel and caliche soils in scrub oak, oak woodlands, and chaparral +
in paniculiform or corymbiform arrays +  and singly +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
0.8 cm8 mm <br />0.008 m <br /> (1 cm10 mm <br />0.01 m <br />) +
turbinate;campanulate +
0.6 cm6 mm <br />0.006 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
serrate +  and dentate +
glandular-hairy +
spinulose-denticulate +
2-carpellate +
persistent +
0.6 cm6 mm <br />0.006 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Flowering May–Jul. +
connate +  and distinct +
in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. +
glandular-hairy +
convex;flat;convex;flat;concave +
barbellulate +  and smooth +
plumose +, subulate +  and setiform +
exalbuminous +
prostrate +  and ascending +
appendaged +  and truncate +
hairy +  and glabrous +
papillate +
Perezia microcephala +
Acourtia microcephala +
Acourtia +
species +
50 cm500 mm <br />0.5 m <br /> (150 cm1,500 mm <br />1.5 m <br />) +
5 cm50 mm <br />0.05 m <br /> (50 cm500 mm <br />0.5 m <br />) +