Grass family (POAceae)
big bluestem (Andropogon gerardii) -- in July -- Shoreline Trail, Lory State Park, CO green & brown
Indian grass (Sorghastrum nutans) -- in September -- Fossil Creek Reservoir, Fort Collins Natural Area green & brown
purple three-awn (Aristida purpurea) -- in July -- Mill Creek Link, Lory State Park, CO green & brown
common reed (Phragmites australis) -- in April -- bank of the Rio Grande River, Big Bend Ranch State Park, TX green & brown
common reed (Phragmites australis) -- in April -- Bluff Lake Nature Center, Denver Area, CO
smooth brome (Bromopsis pumpelliana) -- in July -- Waterfall Trail, Lory State Park, CO green & brown
Japanese brome (Bromus japonicus) -- in July -- Reservoir Ridge Natural Area, Fort Collins, CO
cheatgrass (Bromus tectorum) -- in July -- Mill Creek Link, Lory State Park, CO green & brown
sideoats grama (Bouteloua curtipendula) -- in July -- Shoreline Trail, Lory State Park, CO green & brown
blue grama (Bouteloua gracilis) -- in July -- Satanka Cove Trail, Lory State Park, CO green & brown CO-LSP
buffalograss (Buchloe dactyloides) -- in July -- Satanka Cove Trail, Lory State Park, CO green & brown
marsh muhly (Muhlenbergia racemosa) -- in July -- Well Gulch Trail, Lory State Park, CO green & brown
prairie cordgrass (Spartina pectinata) -- in August -- St. Vrain State Park, CO green & brown
prairie cordgrass (Spartina pectinata) -- in August -- North Shields Ponds, Fort Collins Natural Area, CO
tapered rosette grass (Dichanthelium acuminatum) -- in June -- Shoreline Trail, Lory State Park, CO green & brown
few-flowered panicgrass (Dichanthelium oligosanthes) -- in June -- Well Gulch Nature Trail, Lory State Park, CO green & brown
witchgrass (Panicum capillare) -- in July -- County Road 25G, Bellvue, Larimer County Foothills green & brown
short-awn foxtail (Alopecurus aequalis) -- in July -- Buffalo Pass Road, Jackson County, CO green & brown
Carolina foxtail (Alopecurus carolinianus) -- in July -- Magpie Meander, Fort Collins Natural Area, Larimer County, CO
meadow foxtail (Alopecurus pratensis) -- Buffalo Pass Road, Jackson County, CO green & brown
meadow foxtail (Alopecurus pratensis) -- in May -- Red Mountain Open Space, Larimer County, CO
orchardgrass (Dactylis glomerata) -- in June -- Young Gulch, Poudre Canyon, Larimer County, Co
orchardgrass (Dactylis glomerata) -- in July -- Shoreline Trail, Lory State Park, CO green & brown
Idaho fescue (Festuca idahoensis) -- in September -- Arthur's Rock Trail, Lory State Park, CO green & brown
perennial ryegrass (Lolium perenne) -- in July -- Reservoir Ridge Natural Area, Fort Collins, CO green & brown
wood bluegrass (Poa interior) -- in July -- Timber Trail, Lory State Park, CO green & brown
annual rabbitsfoot (Polypogon monspeliensis) -- in July -- McMurry, Fort Collins Natural Area, Larimer County, CO
annual rabbitsfoot (Polypogon monspeliensis) -- in July -- off of route 21 in northern Utah green & brown
annual rabbitsfoot (Polypogon monspeliensis) -- in September -- Big Thompson Ponds State Wildlife Area, CO
Indian ricegrass (Achnatherum hymenoides) -- in July -- Shoreline Trail, Lory State Park, CO green & brown
needle and thread grass (Hesperostipa comata) -- in July -- Shoreline Trail, Lory State Park, CO green & brown
crested wheatgrass (Agropyron cristatum) -- in July -- Boulder County Open Space, CO green & brown
Canada wildrye (Elymus canadensis) -- in July -- Well Gulch Trail, Lory State Park, CO green & brown
Canada wildrye (Elymus canadensis) -- in September -- Well Gulch Nature Trail, Lory State Park, CO
foxtail barley (Hordeum jubatum) -- in July -- Reservoir Ridge Natural Area, Fort Collins, CO green & brown
tall wheatgrass (Thinopyrum ponticum) -- in July -- Shoreline Trail, Lory State Park, CO green & brown