Compilation
Alternanthera philoxeroides

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Name

Identification
Alternanthera philoxeroides (Mart.) Griseb. [family AMARANTHACEAE ] (stored under name); Isotype of Alternanthera hassleriana Chodat [family AMARANTHACEAE ]
Related name
  • Bucholtzia philoxeroides
  • Bucholzia philoxeroides
  • Alternanthera hassleriana
  • Alternanthera philoxerina
  • Telanthera philoxeroides
  • Alternanthera philoxeroides
Common name
  • Alligatorweed, Flora of North America Vol. 4

Flora

Entry for Alternanthera philoxeroides (Martius) Grisebach [family AMARANTHACEAE]
Herbarium
Flora of North America (FNA)
Collection
Flora of North America
Resource Type
Reference Sources
Entry From
Flora of North America, Vol 4,
Names
Alternanthera philoxeroides (Martius) Grisebach [family AMARANTHACEAE], Abh. Königl. Ges. Wiss. Göttingen, 24: 36. 1879
Bucholzia philoxeroides Martius [family ], Beitr. Amarantac., 107. 1825
Achyranthes philoxeroides (Martius) Standley [family AMARANTHACEAE]
Treatment Author(s)
Steven E. Clemants
Information
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
mar-may (spring), jun-aug (summer)
Altitude range
0–200 m;
Distribution
West Indiesnative to South America.USA Ala.USA Ark.USA Calif.USA Fla.USA Ga.USA Ill.USA Ky.USA La.USA Miss.USA N.C.USA S.C.USA Tenn.USA Tex.USA Va.
Discussion
Alternanthera philoxerioides is said to reproduce only vegetatively in North America. I have seen no fruit or seed.
Native/Introduced
introduced;

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