1. (noun) a plant that when touched or ingested in sufficient quantity can be harmful or fatal to an organism

• aconite
• aethusa cynapium
• fool's parsley
• lesser hemlock
• american holly
• christmas holly
• baneberry
• cohosh
• herb christopher
• california fern
• conium maculatum
• hemlock
• nebraska fern
• poison hemlock
• poison parsley
• winter fern
• chinese lacquer tree
• japanese lacquer tree
• japanese sumac
• japanese varnish tree
• lacquer tree
• rhus verniciflua
• toxicodendron vernicifluum
• varnish tree
• cicuta verosa
• water hemlock
• climbing lily
• creeping lily
• gloriosa
• gloriosa superba
• glory lily
• common snowberry
• snowberry
• symphoricarpos alba
• waxberry
• dogbane
• eastern poison oak
• rhus quercifolia
• rhus toxicodenedron
• toxicodendron quercifolium
• hellebore
• hemlock water dropwort
• oenanthe crocata
• water dropwort
• lantana
• markweed
• poison ivy
• poison mercury
• poison oak
• rhus radicans
• toxicodendron radicans
• nerium oleander
• oleander
• rose bay
• oenanthe aquatica
• water fennel
• poison ash
• poison dogwood
• poison sumac
• rhus vernix
• toxicodendron vernix
• rhus diversiloba
• toxicodendron diversilobum
• western poison oak
• spotted cowbane
• spotted hemlock
• spotted water hemlock

1. (noun) a plant that when touched or ingested in sufficient quantity can be harmful or fatal to an organism

• flora
• plant
• plant life