Contains 9 accepted taxa overall.
Characteristics
Setaria is composed of numerous lineages and similarly the circumscription of Paspalidium is quite uncertain (Kellogg et al. 2009; Layton & Kellogg 2014). Both genera will likely require taxonomic revision.
Classification
Citation
SETARIA Palisot de Beauvois, Ess. Agrostogr. 51, 178, pl. 13(3). 1812, nom. cons. vs. Setaria Acharius ex Michaux 1803.
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TYPE: Setaria viridis (Linnaeus) Palisot de Beauvois, typ. cons. (Panicum viride Linnaeus)
Species
| Scientific Name | Common Name | Herbarium Specimens | Status | Photos |
|---|---|---|---|---|
| Setaria chapmanii | Chapman’s Bristlegrass | |||
| Setaria corrugata | Coastal Bristlegrass, Coastal Foxtail | |||
| Setaria faberi | Nodding Foxtail Grass, Giant Foxtail-grass | |||
| Setaria italica | Foxtail-millet, Italian-millet | |||
| Setaria macrosperma | Coral Bristlegrass | |||
| Setaria magna | Saltmarsh Foxtail-grass, Giant Foxtail-grass | |||
| Setaria parviflora | Knotroot Bristlegrass, Perennial Foxtail-grass | |||
| Setaria sphacelata | African Bristlegrass | |||
| Setaria viridis var. viridis | Green Bristlegrass |
Identification Key
1. Bristles on pedicel below each spikelet 4-18
2
1. Bristles on pedicel below each spikelet 0-3(6) (some spikelets abortive)
3
2. Annual; spikelets 2-3.4 mm long
2. Perennial; spikelets 2-2.5 mm long
3
3. Leaf blades 4-20(25) cm long; inflorescence (11) cm long
3. Leaf blades (8)15-50 cm long; inflorescence (5)10-25 cm long; bristles
4. Bristles retrorsely scabrous
4. Bristles antrorsely scabrous
5
5. Inflorescence branch usually with only bristle subtending the terminal spikelet, bristles subtending more proximal spikelets usually absent or few
6
5. Inflorescence branch with bristles subtending all spikelets
7
6. Annual; leaf blades 10-25 mm wide; inflorescence rachis villous
6. Perennial; leaf blades 20-80 mm wide; inflorescence rachis scabrous or puberulent
7
7. Inflorescence compact and spicate, the branches stiff and 2-5 cm long
7. Inflorescence open and paniculate, the branches lax and 6-10 cm long
8. Perennial; inflorescence somewhat loosely flowered
9
8. Annual; inflorescence usually densely flowered or sometimes somewhat loose
11
9. Spikelets 3-3.2 mm long
9. Spikelets 1.9-2.5 mm long
10
10. Leaf blades 1-5 mm wide; lower glumes ca. 1/3 as long as the spikelets
10. Leaf blades 6-12 mm wide; lower glumes ca. half as long as the spikelets
11. Upper lemmas smooth and shiny (occasionally obscurely rugose); leaf blades 10-35 mm wide
12
11. Upper lemmas distinctly transversely rugose, dull; leaf blades to 4-15(25) mm wide
13
12. Spikelets 2.8-3.2 mm long, the lower palea absent or up to 1/2 as long as the lower lemma
12. Spikelets 1.8-2.2 mm long, the lower palea subequal to the lower lemma
13. Culm nodes often strigose or hispid; upper lemmas coarsely rugose
13. Culm nodes glabrous; upper lemmas finely rugose
14
14. Leaf blade upper surface softly pilose; inflorescence mostly nodding from the base; spikelets 2.5-3 mm long
14. Leaf blades upper surface scabrous; inflorescence mostly nodding only near the apex; spikelets 1.8-2.2 mm long
Genus Synonyms
| Synonym | Full Citation | Basionym | Type |
|---|---|---|---|
| No synonyms found. | |||