Acanthospermum humile

(Swartz) 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. 5: 522. 1836. 1836

Introduced
Basionyms: Melampodium humile Swartz Prodr., 114. 1788
Treatment appears in FNA Volume 21. Treatment on page 37.

Plants 10–20 (–30+) cm. Stems decumbent to erect. Leaf-blades oval to lyrate, 10–30 (–45) mm, faces ± pilosulous to sparsely sericeous, glanddotted. Fruits strongly compressed, ± cuneate, 2–3 (–4) mm, usually 3-ribbed, terminal spines 2, divergent, 2–3 (–4) mm, often 1 ± uncinate, prickles ± uncinate, mostly along 2 ribs and around apices.


Phenology: Flowering all year.
Habitat: Disturbed, often sandy sites
Elevation: 0–10+ m

Distribution

Introduced; Ala., Fla., S.C., West Indies, also in Central America, South America

Discussion

Selected References

None.

Lower Taxa

None.

... more about "Acanthospermum humile"
not tailed +, rounded +  and obtuse +
connate +  and distinct +
subequal +
scarious +
usually ovate +  and lanceolate +
usually deltate +  and lanceolate +
corymbiform +  and open +
indeterminate +  and determinate +
John L. Strother +
(Swartz) de Candolle in A. P. de Candolle and A. L. P. P. de Candolle +
decurrent +
Melampodium humile +
3 cm30 mm <br />0.03 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
oval +  and lyrate +
compound +  and simple +
lyrate;mostly elliptic;deltate rhombic or ovate +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
barbellulate +  and barbellate +
obovoid +  and more or less prismatic +
fertile +  and bisexual +
Ala. +, Fla. +, S.C. +, West Indies +, also in Central America +  and South America +
0–10+ m +
less pilosulous +  and sparsely sericeous +
scabrellous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
dispersed +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Disturbed, often sandy sites +
in open , corymbiform arrays +  and singly +
indeterminate +
homogamous +  and heterogamous +
each +  and sessile +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
hemispheric +
sessile +  and petiolate +
deltate +
dentate to pinnatifid or palmatifid +  and entire +
2-carpellate +
persistent +
rudimentary +
Flowering all year. +
10 +  and 13 +
in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. +
bearing subulate enations +, hairy +  and bristly +
exalbuminous +
Introduced +
decumbent +  and erect +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Compositae +
Acanthospermum humile +
Acanthospermum +
species +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
campanulate +
toothed +  and entire +
60 cm600 mm <br />0.6 m <br /> (120 cm1,200 mm <br />1.2 m <br />) +
10 cm100 mm <br />0.1 m <br /> (60 cm600 mm <br />0.6 m <br />) +
10 cm100 mm <br />0.1 m <br /> (20 cm200 mm <br />0.2 m <br />) +