familyPoaceae
subfamilyPoaceae subfam. Panicoideae
genusSetaria
subgenusSetaria subg. Setaria
speciesSetaria viridis
varietySetaria viridis var. major
Setaria viridis var. major
Common names: Giant green foxtail
Synonyms: Setaria viridis var. robustapurpurea
Treatment appears in FNA Volume 25. Treatment on page 556.
Revision as of 20:33, 16 December 2019 by FNA>Volume Importer
Culms 1-2.5 m; nodes 7-12. Blades 10-25 mm wide. Panicles 10-20 cm, producing around 4,000-6,000 caryopses; lower branches about 3 cm, producing a lobed appearance. Spikelets morphologically indistinguishable from those of var. viridis. 2n = 18.
Distribution
N.J., Tex., Mo., N.C., Mich., Wis., Tenn., N.Y., Pa., Ill., Ky., Oreg.
Discussion
Setaria viridis var. major is a major adventive weed in corn and bean fields of the midwestern United States, dwarfing var. viridis in stature.
Selected References
None.
Lower Taxa
None.