Carolinas and Georgia

2937

Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Caryophyllales

WEAKLEY'S FLORA (11/30/12):
Alternanthera philoxeroides   FAMILY Amaranthaceae

SYNONYMOUS WITH PLANTS NATIONAL DATABASE:
Alternanthera philoxeroides   FAMILY Amaranthaceae

SYNONYMOUS WITH VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 066-01-002:
Alternanthera philoxeroides   FAMILY Amaranthaceae

SYNONYMOUS WITH Manual of the Southeastern Flora (Small, 1933)
Achyranthes philoxeroides

 

COMMON NAME:
Alligator-weed


map
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Look for it floating in mats on the surface of the waters of blackwater rivers, sloughs, ditches, ponds, and in very moist soils of ditches & shores, per Weakley's Flora

Emergent aquatic (rooted along shoreline, but floating mats can detach); Forb
Perennial

Non-native: Tropical America
Documented growing wild in GA NC SC

Common. A serious weed of natural areas


INVASIVE

This plant is causing problems in natural areas outside its native range, according to authorities such as:

 

Aquatic ...Wet

LEAVES:
Simple
Opposite

FLOWER:
Spring/Summer/Fall
White
Bisexual
5 sepals
Petals absent
5 stamens, united at base

FRUIT:
Spring/Summer/Fall
Utricle

 

TO LEARN MORE about this plant, look it up in a good book!



Alternanthera philoxeroides   FAMILY Amaranthaceae

Alligator-weed