Alternanthera caracasana

Kunth in A. von Humboldt et al.

in A. von Humboldt et al., Nov. Gen. Sp. 2: 205. 1818.

WeedyIntroducedIllustrated
Synonyms: Alternanthera peploides (Humboldt & Bonpland ex Schultes) Urban
Treatment appears in FNA Volume 4. Treatment on page 451. Mentioned on page 448, 449.

Herbs, perennial, 1–5 dm. Stems prostrate to procumbent, villous, glabrate. Leaves sessile; blade rhombic-ovate, oval, or obovate, usually longer than broad, 0.5–2.5 × 0.3–1.5 cm, apex rounded, apiculate, sparsely villous, glabrate. Inflorescences axillary, sessile; heads white to stramineous, ovoid, 0.5–0.8 × 0.4–0.6 cm; bracts shorter than tepals, apex long-attenuate, aristate. Flowers: tepals dimorphic, whitish to stramineous, lanceolate, 3–5 mm, apex acuminate, spinose-tipped, densely villous, hairs barbed; stamens 5; pseudostaminodes triangular or subulate, shorter than filaments, margins usually entire, rarely dentate. Utricles included within tepals, brown, ovoid-orbicular, 1.5 mm, apex slightly truncate. Seeds ovate-orbiculate, 1–1.5 mm.


Phenology: Flowering summer–fall.
Habitat: Gravel, sand bars, sidewalks
Elevation: 0-2000 m

Distribution

V4 887-distribution-map.gif

Introduced; Ala., Ariz., Ark., Calif., Fla., Ga., La., Md., Miss., N.Mex., N.C., Okla., S.C., Tex., Mexico, Central America, South America

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Alternanthera caracasana"
truncate +, spinose-tipped +  and apiculate +
villous +  and glabrate +
Steven E. Clemants +
Kunth in A. von Humboldt et al. +
0.5 cm5 mm <br />0.005 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
usually longer than broad +
obovate +, oval +  and rhombic-ovate +
0.3cm;1.5cm +
Ala. +, Ariz. +, Ark. +, Calif. +, Fla. +, Ga. +, La. +, Md. +, Miss. +, N.Mex. +, N.C. +, Okla. +, S.C. +, Tex. +, Mexico +, Central America +  and South America +
0-2000 m +
peripheral +
hypogynous +
minute +  and small +
not +  and dehiscent +
Gravel, sand bars, sidewalks +
several-flowered +
white +  and stramineous +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
subtending +
dentate +  and entire +
Flowering summer–fall. +
subulate +  and triangular +
in A. von Humboldt et al., Nov. Gen. Sp. +
ovate-orbiculate +
Weedy +, Introduced +  and Illustrated +
several-flowered +
cylindric +
prostrate +  and procumbent +
decumbent +  and prostrate +
erect +  and ascending +
2-lobed +  and capitate +
0.2 cm2 mm <br />0.002 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Alternanthera peploides +
Alternanthera caracasana +
Alternanthera +
species +
whitish +  and stramineous +
distinct +
lanceolate +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
indurate +, membranaceous +, chartaceous +  and scarious +
indehiscence +
ovoid-orbicular +
1.5 cm15 mm <br />0.015 m <br /> (?) +