Chenopodium genus --- amaranth family

lambsquarters (Chenopodium album) -- in July -- Watson Lake State Wildlife Area, CO              green & brown       

lambsquarters (Chenopodium album) -- in September -- Red Mountain Open Space, Larimer County, CO

Fremont's goosefoot (Chenopodium fremontii) -- in August -- Prospect Ponds/ CSU ELC, Fort Collins, CO     green & brown

narrowleaf goosefoot (Chenopodium leptophyllum) -- in July -- Reservoir Ridge Natural Area, Fort Collins, CO   green & brown