Locoweed (also loco-weed, loco weed, and capitalizations and plurals thereof) may refer to:
Plants Species in the genera Astragalus and Oxytropis, collectively Species in the genera Astragalus and Oxytropis, that cause locoism (locoweed disease) in livestock Species with "locoweed" (etc.) in a common name, including: Astragalus alpinus, mountain locoweed Astragalus austiniae, ball-flowered locoweed Astragalus canadensis, Canada locoweed Astragalus coccineus, scarlet locoweed Astragalus didymocarpus, white dwarf locoweed Astragalus gambelianus, dwarf locoweed Astragalus holmgreniorum, Holmgren locoweed Astragalus lentiginosus, mottled locoweed, speckled locoweed, spotted locoweed Astragalus mollissimus, woolly locoweed, stemmed locoweed Astragalus oxyphysus, Diablo locoweed Astragalus pomonensis, Pomona locoweed Astragalus purshii, woolly-pod locoweed Astragalus speirocarpus, coilpod locoweed Astragalus trichopodus, coast locoweed, Southern California locoweed Astragalus whitneyii, Whitney's locoweed
Cannabis, loco weed, when used as a recreational drug
Datura stramonium, loco weed, when used as a hallucinogen
Oxytropis arctica, arctic locoweed Oxytropis besseyi, Bessey's locoweed Oxytropis borealis, boreal locoweed Oxytropis campestris, Fassett's locoweed, field locoweed, northern yellow locoweed Oxytropis deflexa, nodding locoweed, pendant-pod locoweed Oxytropis huddelsonii, Huddelson's locoweed Oxytropis jordalii, Jordal's locoweed Oxytropis kobukensis, Kobuk locoweed Oxytropis kokrinensis, Kokrines locoweed Oxytropis lagopus, hare-foot locoweed Oxytropis lambertii, Colorado locoweed, Lambert locoweed, locoweed, purple locoweed, stemless locoweed, woolly locoweed Oxytropis maydelliana, Maydell's locoweed Oxytropis mertensiana, Mertens' locoweed Oxytropis monticola, late yellow locoweed, yellow-flower locoweed Oxytropis multiceps, southwestern locoweed Oxytropis nana, Wyoming locoweed Oxytropis nigrescens, black(ish) locoweed Oxytropis oreophila, mountain locoweed Oxytropis parryi, Parry's locoweed Oxytropis podocarpa, stalked-pod locoweed Oxytropis riparia, Ruby Valley locoweed Oxytropis scammaniana, Scamman's locoweed Oxytropis sericea, early yellow locoweed, locoweed, Rocky Mountain locoweed, silky locoweed, white locoweed, white point locoweed Oxytropis splendens, showy locoweed, whorled locoweed Oxytropis viscida, sticky locoweed
Music Loco Weed, Mel Tillis song