Definition that contains family melanthiaceae
- genus zigadenus genus of mostly North American poisonous plants; sometimes placed in family Melanthiaceae
- veratrum a genus of coarse poisonous perennial herbs; sometimes placed in subfamily Melanthiaceae
- fly poison all parts of plant are highly toxic; bulb pounded and used as a fly poison; sometimes placed in subfamily Melanthiaceae
- genus tofieldia genus of perennial herbs of cool temperate regions; sometimes placed in family Melanthiaceae
- amianthum one species: fly poison; sometimes placed in family Melanthiaceae
- narthecium bog asphodels; sometimes placed in family Melanthiaceae
- xerophyllum small genus of North American herbs having grasslike basal leaves: squaw grass; sometimes placed in family Melanthiaceae
- genus aletris small genus of bitter-rooted herbs of eastern North America and Asia; sometimes placed in family Melanthiaceae
- genus veratrum a genus of coarse poisonous perennial herbs; sometimes placed in subfamily Melanthiaceae
- amianthum muscaetoxicum all parts of plant are highly toxic; bulb pounded and used as a fly poison; sometimes placed in subfamily Melanthiaceae