The green links below add additional plants to the comparison table. Blue links lead to other Web sites.
enable glossary links

sessile joyweed

Habit Herbs, annual or perennial, 2–6 dm.

procumbent, pubescent in lines, glabrate.



blade elliptic to oblong or oblanceolate, 1.2–5 × 0.5–2.2 cm, apex obtuse to acute, glabrous.


axillary, sessile;

heads white, subglobose or ovoid, 0.5–1.1 cm;

bracts keeled, ca. 1/2 as long as tepals.


tepals white, ovate to lanceolate, 2–3.5 mm, apex acuminate, hairs not barbed;

stamens 5;

anthers 3–5, globose;

pseudostaminodes subulate, margins laciniate.


lenticular, 0.9–1.1 mm.


included within tepals, sides exerted in mature fruit, greenish stramineous, obcordate, 1.3–1.7 mm, apex retuse.

Alternanthera sessilis

Phenology Flowering summer–early fall.
Habitat Wet disturbed areas
Elevation 0-20 m [0-100 ft]
from USDA
Mexico; South America; West Indies; Central America (Belize, Costa Rica, Guatemala, Nicaragua, Panama); Africa; Asia [Introduced, Ala., Fla., Ga., La.]
[WildflowerSearch map]
[BONAP county map]

Alternanthera sessilis is reported from Maryland, Mississippi, South Carolina, and Texas, but I have seen no specimens from these states.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 4, p. 450.
Parent taxa Amaranthaceae > Alternanthera
Sibling taxa
A. brasiliana, A. caracasana, A. ficoidea, A. flavescens, A. maritima, A. paronychioides, A. philoxeroides, A. pungens
Synonyms Gomphrena sessilis
Name authority (Linnaeus) R. Brown ex de Candolle: Cat. Pl. Hort. Monsp., 77. (1813)
Web links