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Bromus tectorum L. ssp. tectorum — Sales (1993), Sales (1994); > Bromus tectorum L. var. glabratus Spenn. — NS; > Bromus tectorum L. var. hirsutus Regel — NS; > Bromus tectorum L. var. tectorum — Mo1, NcTx, NS]"},{"field":"heliophily_index","source_column":"HIndex","source_database_sha256":"684f6b364ff9f3023aa61ed02ae50f6f6d6d4d3bcf76847b78ab769ae0453469","source_record_id":1832,"source_table":"Organism","value":8},{"field":"habitat_moisture_categories","source_column":"Attr2","source_database_sha256":"684f6b364ff9f3023aa61ed02ae50f6f6d6d4d3bcf76847b78ab769ae0453469","source_record_id":1832,"source_table":"GraphicKey","value":["Dry","Moist","Wet"]},{"field":"habitat_light_categories","source_column":"Attr3","source_database_sha256":"684f6b364ff9f3023aa61ed02ae50f6f6d6d4d3bcf76847b78ab769ae0453469","source_record_id":1832,"source_table":"GraphicKey","value":["Partial shade","Full sun"]},{"field":"graphic_key_source_attributes","source_column":"Attr0..25","source_database_sha256":"684f6b364ff9f3023aa61ed02ae50f6f6d6d4d3bcf76847b78ab769ae0453469","source_record_id":1832,"source_table":"GraphicKey","value":{"Attr0":"gr03","Attr1":"nc_cp,nc_mt,nc_pd,sc_cp,sc_mt,sc_pd,ga_cp,ga_mt,ga_pd,","Attr10":"a","Attr11":"p","Attr12":"me","Attr13":"3Bw7","Attr2":"Dry,Moist,Wet","Attr3":"Part,Sun","Attr3a":"n","Attr3a_subregion":"native_nc_cp:n,native_nc_mt:n,native_nc_pd:n,native_sc_cp:n,native_sc_mt:n,native_sc_pd:n,native_ga_cp:n,native_ga_mt:n,native_ga_pd:n,","Attr4":" 3-7","Attr5":"h","Attr6":"le,mo","Attr7":"l","Attr8":"mo","Attr9":"p"}},{"field":"bloom_season","source_column":"Phenology","source_database_sha256":"684f6b364ff9f3023aa61ed02ae50f6f6d6d4d3bcf76847b78ab769ae0453469","source_record_id":1832,"source_table":"Organism","value":"April to June"}],"values":{"bloom_season":"April to June","geographic_range_description":"Native of Europe.","graphic_key_source_attributes":{"Attr0":"gr03","Attr1":"nc_cp,nc_mt,nc_pd,sc_cp,sc_mt,sc_pd,ga_cp,ga_mt,ga_pd,","Attr10":"a","Attr11":"p","Attr12":"me","Attr13":"3Bw7","Attr2":"Dry,Moist,Wet","Attr3":"Part,Sun","Attr3a":"n","Attr3a_subregion":"native_nc_cp:n,native_nc_mt:n,native_nc_pd:n,native_sc_cp:n,native_sc_mt:n,native_sc_pd:n,native_ga_cp:n,native_ga_mt:n,native_ga_pd:n,","Attr4":" 3-7","Attr5":"h","Attr6":"le,mo","Attr7":"l","Attr8":"mo","Attr9":"p"},"habitat_description":"Disturbed areas.","habitat_light_categories":["Partial shade","Full sun"],"habitat_moisture_categories":["Dry","Moist","Wet"],"heliophily_index":8,"phenology_source_text":"Apr-Jun.","taxonomic_synonymy":"[= Ar, C, Can, ETx1, F, FlGr, FNA24, G, HC, Il, K1, K4, Mi, NE, NY, Pa, POWO, RAB, S, S13, Tat, Tn, Tx, Va, W, WV, Pavlick (1995), Tucker (1996); ? Bromus tectorum L. ssp. tectorum — Sales (1993), Sales (1994); > Bromus tectorum L. var. glabratus Spenn. — NS; > Bromus tectorum L. var. hirsutus Regel — NS; > Bromus tectorum L. var. tectorum — Mo1, NcTx, NS]"}},"forest_service":{"identity_basis":"Exact existing catalog or state-source name","matched_name":"Bromus tectorum","retrieved":"2026-10-01T13:42:23.555197+00:00","scope":"Source botanical description; original units and scope retained","scoring_allowed":false,"source_label":"Fire Effects Information System: Bromus tectorum","source_sha256":"da6b19adc91ff4ec449c2d7f544be0a992cc3903acb10b25191b06587944a31d","source_url":"https://research.fs.usda.gov/feis/species-reviews/brotec","trait_evidence":[{"catalog_id":"nc:bromus-tectorum","field":"height_description","height_description":"In contrast, where moisture, fertility or light intensity are not limiting, cheatgrass plants may produce 12-15 culms, 20 to 30 inches (50-75 cm) tall, bearing hundreds of spikelets [307,438].","life_stage":"general_botanical_description","matched_name":"Bromus tectorum","paragraph_sha256":"6203517b79a6d459b89a2154b3776f70b28953ae4b3d3a14d710c22dcae75bc1","retrieved":"2026-10-01T13:42:23.555197+00:00","review_status":"reviewed","source_quote":"Cheatgrass is morphologically and phenotypically variable [207,235,272,319]. A common garden experiment by Hulbert [207] demonstrated the existence of several distinct ecotypes with differences in winter hardiness, phenology, height of culms, pubescence on lemmas, openness of panicles, and dorsal compression of florets. Cheatgrass exhibits considerable plasticity in its response to variation in site conditions. It may produce a single culm 1 to 4 inches (2.5-10 cm) tall and bearing only 1 spikelet when growing in a very dense monospecific stand, or on an infertile, droughty site. In contrast, where moisture, fertility or light intensity are not limiting, cheatgrass plants may produce 12-15 culms, 20 to 30 inches (50-75 cm) tall, bearing hundreds of spikelets [307,438].","source_section":"Bromus tectorum, cheatgrass / Botanical Description","source_sha256":"da6b19adc91ff4ec449c2d7f544be0a992cc3903acb10b25191b06587944a31d","source_title":"Fire Effects Information System: Bromus tectorum","source_url":"https://research.fs.usda.gov/feis/species-reviews/brotec"}],"values":{"height_description":"In contrast, where moisture, fertility or light intensity are not limiting, cheatgrass plants may produce 12-15 culms, 20 to 30 inches (50-75 cm) tall, bearing hundreds of spikelets [307,438]."}}},"light_range":["part shade","full sun"],"light_source":"Weakley, Flora of the Southeastern United States (2025), Carolinas & Georgia edition","native_synthesis":{"claims":[{"claim":"introduced","matched_name":"Bromus tectorum","scope":"L48","source":"usda","text":"AK:I CAN:I GL:I HI:I L48:I","url":"https://plants.usda.gov/"},{"basis":"range text names a native range outside North America","claim":"introduced","scope":"NC-SC-GA","source":"floraquest_carolinas_georgia","text":"Native of Europe.","url":"https://fsus.ncbg.unc.edu/"},{"basis":"range text names a native range outside North America","claim":"introduced","scope":"AL-MS-TN","source":"floraquest_south_central","text":"Native of Europe.","url":"https://fsus.ncbg.unc.edu/"},{"basis":"alien asterisk: exotic throughout the Flora area","claim":"introduced","matched_name":"Bromus tectorum","scope":"AL-AR-DC-DE-FL-GA-KY-LA-MD-MS-NC-NJ-PA-SC-TN-VA-WV","source":"weakley_fsus","url":"https://fsus.ncbg.unc.edu/"},{"basis":"Native field of the South Central edition; the state is in its distribution","claim":"introduced","record_id":1832,"scope":"AL-MS-TN","source":"floraquest_south_central","url":"https://fsus.ncbg.unc.edu/"},{"basis":"NatureServe subnational native or exotic flag for this state","claim":"introduced","matched_name":"Bromus tectorum","scope":"MS","source":"natureserve_explorer","srank":"SNA","url":"https://explorer.natureserve.org/Taxon/ELEMENT_GLOBAL.2.135508/Bromus_tectorum"}],"county_native_range":"unresolved","decided_by":"natureserve_explorer","explanation":"NatureServe Explorer (garden or conservation group, state claim) gives the value, over a broader claim from a higher tier. 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