| zigadenus | (n) genus of mostly North American poisonous plants; sometimes placed in family Melanthiaceae, Syn. genus Zigadenus |
| alkali grass | (n) plant of western North America having grasslike leaves and greenish-white flowers, Syn. Zigadenus elegans |
| grassy death camas | (n) plant of western North America to Mexico; poisonous especially to grazing animals, Syn. Zigadenus venenosus, Zigadenus venenosus gramineus |
| poison camas | (n) a common perennial death camas; Tennessee to Kansas to Texas, Syn. Zigadenus nuttalli |
| white camas | (n) plant of eastern and central North America having creamy white flowers tinged with brown or purple; poisonous especially to grazing animals, Syn. Zigadenus glaucus |