Contains 5 accepted taxa overall.
Characteristics
Classification
Citation
ALTERNANTHERA Forsskal, Fl. Aegypt.-Arab. lix, 28. 1775.
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TYPE: Alternanthera achyranthes Forsskal
Species
| Scientific Name | Common Name | Herbarium Specimens | Status | Photos |
|---|---|---|---|---|
| Alternanthera caracasana | Washerwoman | |||
| Alternanthera paronychioides | Smooth Joyweed | |||
| Alternanthera philoxeroides | Alligator-weed | |||
| Alternanthera pungens | ||||
| Alternanthera sessilis | Sessile Joyweed |
Identification Key
1. Inflorescence pedunculate
2
1. Inflorescence sessile to subsessile
4
2. Leaves sessile, the blade apex subacute to rounded; bracts not keeled; tepals glabrous
2. Leaves mostly petiolate, the blade apex acute to acuminate; bracts keeled; tepals pilose
3
3. Young stems and leaves villous; bracts slightly shorter to subequal to tepals
3. Young stems and leaves pubescent, strigose, to glabrous; bracts <½ the length of tepals
4. Tepals dimorphic, the tip spinose, hairs barbed
5
4. Tepas monomorphic, not spinose, hairs not barbed
6
5. Leaf blades longer than wide; tepals 3-5 mm long, weakly spinose-tipped, densely villous; pseudostaminode margin dentate
5. Leaf blades often as wide as long; tepals 5-7 mm long, strongly spinose-tipped, sparsely villous; pseudostaminode margin dentate
6. Pseudostaminode margin entire, dentate, to laciniate
7
6. Pseudostaminode margin fimbriate
8
7. Young stems and leaves villous; mature fruit included within tepals
7. Young stems and leaves glabrate; mature fruit expanded beyond the tepals
8. Young stems pubescent; leaves not succulent; tepals chartaceous, pilose to hispid
8. Young stems glabrous; leaves semi-succulent; tepals rigid, glabrous
Genus Synonyms
| Synonym | Full Citation | Basionym | Type |
|---|---|---|---|
| No synonyms found. | |||