Contains 9 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 brasiliana | BRAZILIAN JOYWEED | Not Native | ||
| Alternanthera caracasana | WASHERWOMAN | Not Native | ||
| Alternanthera ficoidea | SLENDER JOYWEED | Not Native | ||
| Alternanthera flavescens | YELLOW JOYWEED | Native UPL (NWPL) | ||
| Alternanthera maritima | SEASIDE JOYWEED | Native FACW (DEP) | ||
| Alternanthera paronichyoides | SMOOTH JOYWEED | Not Native FAC (DEP) | ||
| Alternanthera philoxeroides | ALLIGATORWEED | Not Native OBL (NWPL) Y OBL (DEP) | ||
| Alternanthera pungens | KHAKIWEED | Not Native | ||
| Alternanthera sessilis | SESSILE JOYWEED | Not Native OBL (NWPL) OBL (DEP) |
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 |
|---|---|---|---|
| Adoceton | Adoceton Rafinesque, Amer. Monthly Mag. & Crit. Rev. 1: 438. 1817. | TYPE: | |
| Allaganthera | Allaganthera Martius, Pl. Horti Erlang. 69. 1814. | TYPE: = Alternanthera Forsskal 1775. | |
| Bucholzia | Bucholzia Martius, Nova Gen. Sp. 2: 49. 1826, non Stadtmann ex Willemet 1796. | TYPE: Non designatus. | |
| Illecebrum | Illecebrum Sprengel, Anleit. Kenntn. Gew., ed. 2. 2(1): 317. 1817, non Linnaeus 1753. | TYPE: = Alternanthera Forsskal 1775. | |
| Mogiphanes | Mogiphanes Martius, Nova Gen. Sp. 2: 29. 1826. | TYPE: Non designatus. | |
| Pityranthus | Pityranthus Martius, Denkschr. Koenigl. Akad. Wiss. Muenchen 5: 179. 1817. | TYPE: Pityranthus crassifolius Martius, nom. illegit. (Achyranthes repens Linnaeus) | |
| Steiremis | Steiremis Rafinesque, Fl. Tellur. 3: 40. 1837 ("1836"). | TYPE: Non designatus. | |
| Telanthera | Telanthera R. Brown, in Tuckey, Narr. Exped. Zaire 477. 1818. | TYPE: Telanthera manillensis Walpers |