Centromadia pungens subsp. laevis

(D. D. Keck) B. G. Baldwin

Novon 4: 467. 1999.

Basionym: Hemizonia pungens subsp. laevis D. D. Keck Madroño 3: 14. 1935
Synonyms: Hemizonia laevis (D. D. Keck) D. D. Keck
Treatment appears in FNA Volume 21. Treatment on page 277.

Leaves: margins bristly-ciliate, faces glabrous but for bristly midribs. Paleae little, if at all, exserted, apices obtuse to acute, sometimes apiculate. 2n = 18.


Phenology: Flowering Apr–Sep.
Habitat: Open, ± alkaline flats, depressions, stream banks and beds, grasslands, disturbed sites
Elevation: 90–500 m

Distribution

V21-676-distribution-map.gif

Calif., Mexico (Baja California)

Discussion

Of conservation concern.

Subspecies laevis is known only from the interior South Coast region and Peninsular Ranges.

Selected References

None.

Lower Taxa

None.
not tailed +, rounded +  and obtuse +
yellow +  and brownish +
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 +
(D. D. Keck) B. G. Baldwin +
decurrent +
Hemizonia pungens subsp. laevis +
compound +  and simple +
linear to linear-elliptic +
oblanceolate +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
barbellulate +  and barbellate +
hairy +  and glabrous +
fusiform +, clavate +, obpyramidal +, terete +, compressed +  and obcompressed +
fertile +  and bisexual +
fertile +  and bisexual +
Calif. +  and Mexico (Baja California) +
90–500 m +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
umbelliform +  and spiciform-paniculiform +
Open, ± alkaline flats, depressions, stream banks and beds, grasslands, disturbed sites +
indeterminate +
homogamous +  and heterogamous +
each +  and sessile +
0.3 cm3 mm <br />0.003 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
urceolate;obconic +
0.3 cm3 mm <br />0.003 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
petiolate +  and sessile +
alternate +  and opposite +
hirsute +, scabrous +  and glabrous +
deltate +
dentate to pinnatifid or palmatifid +  and entire +
2-carpellate +
persistent +
of 3 +  and 12 linear , oblanceolate or subulate , scales +
Flowering Apr–Sep. +
5 +  and 75 +
1-2-pinnatifid +
alternate +  and opposite +
flat;convex +
3 +  and 12 +
subulate +, oblanceolate +  and linear +
exalbuminous +
Conservation concern +
less erect +  and prostrate +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Hemizonia laevis +
Centromadia pungens subsp. laevis +
Centromadia pungens +
subspecies +
cylindric +
entire +  and toothed +
10 cm100 mm <br />0.1 m <br /> (120 cm1,200 mm <br />1.2 m <br />) +