Contains 4 accepted taxa overall.
Characteristics
Classification
Citation
SORGHASTRUM Nash, in Britton, Man. Pl. N. States 71. 1901.
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TYPE: Sorghastrum avenaceum (Bentham) Nash (Chrysopogon avenaceus Bentham)
Species
| Scientific Name | Common Name | Herbarium Specimens | Status | Photos |
|---|---|---|---|---|
| Sorghastrum apalachicolense | APALACHICOLA INDIANGRASS | Native | ||
| Sorghastrum elliottii | SLENDER INDIANGRASS | Native | ||
| Sorghastrum nutans | YELLOW INDIANGRASS | Native FACU (NWPL) | ||
| Sorghastrum secundum | LOPSIDED INDIANGRASS | Native FACU (NWPL) |
Identification Key
1. Rhizomatous; spikelet awns 2-15(30) mm long, mostly with one bend (once-geniculate); glume surfaces stramineous to faintly brown
1. Cespitose; awns (16)25-40 mm long, mostly with two bends (twice-geniculate, sometimes subtle); glume surfaces brown
2
2. Inflorescence secund; pedicels sharply curved or recurved; spikelets 0.8-1.2 mm wide
2. Inflorescence not secund; pedicels flexuous; spikelets 1.1-1.8 mm wide
3
3. Inflorescence main axis straight to slightly curved, with branches arising from all sides; spikelets 1.3-1.8 mm wide; flowering Jul-Sep
3. Inflorescence main axis arching, with branches arising from one side; spikelets 1.1-1.4 mm wide; flowering Sep-Nov
Genus Synonyms
| Synonym | Full Citation | Basionym | Type |
|---|---|---|---|
| Chalcoelytrum | Chalcoelytrum Lunell, Amer. Midl. Naturalist 4: 212. 1915. | TYPE: = Sorghastrum Nash 1901. Proposed as a substitute name for Sorghastrum Nash 1901. | |
| Poranthera | Poranthera Rafinesque, Bull. Bot. (Geneva) 1: 221. 1830, non Rudge 1811. | TYPE: Non designatus. |