Achyrachaena mollis

Schauer

Index Seminum (Bratislava) 1837: [3]. 1837.

Common names: Blow-wives
Illustrated
Treatment appears in FNA Volume 21. Treatment on page 259.

Leaf-blades 2–15 cm × 1–7+ mm. Phyllaries 10–20 mm. Ray corollas inconspicuous, laminae usually erect, sometimes spreading, 4–7 mm. Disc corollas 6–10 mm. Cypselae black, 4.5–9 mm; pappi (disc) of 5 outer scales 3–9 mm plus 5 inner scales 6–13 mm. 2n = 16.


Phenology: Flowering Mar–Jun.
Habitat: Grassy, often wet sites, usually with clay-rich soils
Elevation: 0–900 m

Distribution

V21-636-distribution-map.gif

Calif., Oreg., Mexico (Baja California)

Discussion

Achyrachaena mollis grows in low-elevation grasslands, savannas, and open woodlands throughout the California Floristic Province and occurs with vernal tarweeds of the genus Layia. During flowering, pappus scales of each disc floret form cylinders (imparting a honeycomb-like appearance to apices of heads); they are widely spread in fruiting heads. The species is self-compatible and is not known to hybridize with other tarweeds.

Selected References

None.

Lower Taxa

None.

... more about "Achyrachaena mollis"
not tailed +, rounded +  and obtuse +
pale +  and dark +
connate +  and distinct +
subequal +
scarious +
usually ovate +  and lanceolate +
usually deltate +  and lanceolate +
umbelliform +, spiciform +, paniculiform +, glomerulate +  and corymbiform +
indeterminate +  and determinate +
Bruce G. Baldwin +  and John L. Strother +
Schauer +
decurrent +
compound +  and simple +
linear to linear-elliptic +
lobed;usually spatulate;oblanceolate +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
barbellulate +  and barbellate +
Blow-wives +
yellow +  and reddish +
hairy +  and glabrous +
fusiform +, clavate +, obpyramidal +, terete +, compressed +  and obcompressed +
fertile +  and bisexual +
0.6 cm6 mm <br />0.006 m <br /> (1 cm10 mm <br />0.01 m <br />) +
fertile +  and bisexual +
Calif. +, Oreg. +  and Mexico (Baja California) +
0–900 m +
glandular-pubescent +, villous +  and hirsute +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Grassy, often wet sites, usually with clay-rich soils +
in loose , more or less corymbiform arrays +  and singly +
indeterminate +
homogamous +  and heterogamous +
each +  and sessile +
0.6 cm6 mm <br />0.006 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
less campanulate;cylindric or ellipsoid +
spreading +  and erect +
0.4 cm4 mm <br />0.004 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
2 cm20 mm <br />0.02 m <br /> (15 cm150 mm <br />0.15 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
petiolate +  and sessile +
alternate +  and opposite +
lance-deltate +
dentate to pinnatifid or palmatifid +  and entire +
toothed +  and entire +
0.3 cm3 mm <br />0.003 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
2-carpellate +
persistent +
Flowering Mar–Jun. +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
Index Seminum (Bratislava) +
clavate +  and obcompressed +
bearing subulate enations +, hairy +  and bristly +
flat;convex +
exalbuminous +
Illustrated +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Compositae +
Achyrachaena mollis +
Achyrachaena +
species +
cylindric +
toothed +  and entire +
4 cm40 mm <br />0.04 m <br /> (62 cm620 mm <br />0.62 m <br />) +
shrub +  and subshrub +