Alternanthera philoxeroides

Herbs, perennial, aquatic to semiterrestrial, stoloniferous, to 50 dm. Stems prostrate, forming mats, often fistulose, glabrous. Leaves sessile; blade narrowly elliptic, elliptic, or oblanceolate, 3.5–7.1 × 0.5–2 cm, herbaceous, apex acute to obtuse, glabrous. Inflorescences terminal and axillary, pedunculate; heads white, globose, 1.4–1.7 cm diam.; bracts not keeled, less than 1/2 as long as tepals. Flowers: tepals monomorphic, white, lanceolate or oblong, 6 mm, apex acute, glabrous; stamens 5; pseudostaminodes ligulate. Utricles not seen. Seeds not seen.

Phenology: Flowering early spring–summer.
Habitat: Ponds, ditches, streams, bayous
Elevation: 0-200 m

Ala., Ark., Calif., Fla., Ga., Ill., Ky., La., Miss., N.C., S.C., Tenn., Tex., Va., West Indies, native to South America.

Discussion

Alternanthera philoxerioides is said to reproduce only vegetatively in North America. I have seen no fruit or seed.

References

None.

Lower Taxa

No lower taxa listed.

Author	Steven E. Clemants +
Authority	(Martius) Grisebach +
Basionyms	Bucholzia philoxeroides +
Common name	Alligatorweed +
Distribution	Ala. +, Ark. +, Calif. +, Fla. +, Ga. +, Ill. +, Ky. +, La. +, Miss. +, N.C. +, S.C. +, Tenn. +, Tex. +, Va. +, West Indies + and native to South America. +
Elevation	0-200 m +
Habitat	Ponds, ditches, streams, bayous +
Illustrator	Yevonn Wilson-Ramsey +
Introduced	true +
Phenology	Flowering early spring–summer. +
Publication title	Abh. Königl. Ges. Wiss. Göttingen +
Publication year	1879 +
Reference	None +
Source xml	https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse grained fna xml/V4/V4 880.xml +
Synonyms	Achyranthes philoxeroides +
Taxon family	Amaranthaceae +
Taxon name	Alternanthera philoxeroides +
Taxon parent	Alternanthera +
Taxon rank	species +
Volume	Volume 4 +

Alternanthera philoxeroides

Contents

Distribution

Discussion

References

Lower Taxa