Just because a plant is beautiful does n’t intend it ’s safe to tinct . While hiking through national parks , it ’s easy to be quarter to outstanding blush , lush foliage , or unique textures . But behind that looker , some plantshide serious irritant , toxin , or painful defensesthat can leave you itch , burn — or bad .

Many of these plant areprotected species , while others are simply grave . Touching them candamage the plant , harm local ecosystems , or result inrashes , blisters , or even hospital sojourn . And in national parks , where the flora is often wild and untouched , it ’s especially important toadmire from a length .

Poison Ivy

The sight of poison ivy ’s showy , trifoliolate leaves might invite an unwary hiker , yet beneath its invite appearance lie a troublesome secret . This plant is ill-famed for causing skin pique , often resulting in an itchy , blister skin rash . greet its “ leaves of three ” structure is crucial for keep off an itchy encounter .

Native to North American forests , poison ivy fly high in shaded areas , go seamlessly with other botany . Its vegetable oil are potent and can be transferred to skin or clothing , so it ’s best to admire from afar .

Fun fact : Even in wintertime , rival the unornamented stem can still lead to a skin rash .

13 Beautiful Plants You Should Never Touch in National Parks

Giant Hogweed

Giant hogweed stands out with its impressive height and spectacular efflorescence clusters . However , this beauty harbors a dark side . tangency with its sap can have wicked skin sunburn and increase sensitivity to sunshine .

This predominate plant can extend to up to 14 feet , making it hard to miss in opened blank space . Its phototoxic sap is a serious headache for those who come too close .

Although alluring , a wise IE keep a respectful length . Interesting promissory note : jumbo hogweed was in the first place imported from Asia as an cosmetic plant .

Poison Ivy

© Alabama Cooperative Extension System –

Stinging Nettle

Stinging nettle ’s unassuming leave conceal a painful surprisal . Covered in tiny , hair - like structures , a thicket against this plant release histamines and other chemicals that do a bite adept and itchiness .

Frequently found in moist , rich soils , this plant is usual along trails . Its bunko game is temporary but memorable , cheer outdoor enthusiasts to give it a wide-cut place .

Despite its sting , nettle is prise for its nutritional property in herbal medicine once in good order processed .

Poison Ivy

Poison Oak

The lobed leaves of poison oak tree may catch the eye with their pictorial surrender colour , but contact is best avoided . Like poison ivy , it contains urushiol oil , responsible for for cause antsy and sulfurous rash .

Thriving in both timber and coastal regions , this plant often masquerades as part of the underwood . spot its wide-ranging forms , from shrub - like to wax vines , is essential for refuge .

An interesting twist : Poison oak changes color throughout the seasons , adding to its delusory charm .

Giant Hogweed

© Gardeners’ World

Cow Parsnip

moo-cow parsnip ’s broad leave and towering ashen blossom are a sight to lay eyes on , yet precaution is advised . physical contact with its sap , like gargantuan cow parsnip , can cause photosensitive skin reaction .

This plant is a native counterpart to its more notorious proportional , jumbo Heracleum sphondylium , and can be found across North America . Its power to cause peel annoyance makes it a works to appreciate from a distance .

bakshish : Its bloom head are standardized to Queen Anne ’s lacing but importantly larger .

Giant Hogweed

Oleander

Oleander ’s delicate , fragrant flowers are undeniably beautiful , yet every part of this plant is extremely toxic if ingested . Even inhaling smoke from burning Nerium oleander can pose serious health risk .

Usually found in warm climates , it is both an ornamental and a potentially pernicious plant in national parkland . While its flower enchant , impudent visitant will admire without touching or tasting .

Educational tidbit : Oleander has been used in traditional medicine , but its toxicity require cautious treatment .

Stinging Nettle

© The Plant Good Seed Company

Poison Hemlock

Poison hemlock tree might resemble a harmless wild cultivated carrot , but its toxic repute is well - pull in . All percentage of this plant are poisonous , posing a jeopardy to both humans and animals .

Typically found in moist environments , such as along riverbanks , it can spring up up to eight feet tall . Its white flower clusters and fern - like leaves can be misleadingly magic .

Did you be intimate ? Poison hemlock was historically used as a method acting of execution , most famously for Socrates .

Stinging Nettle

Monkshood

Monkshood ’s abstruse naughty heyday , resembling a monastic ’s hood , are visually trance but hold in a potent toxin . get it on as one of the most toxicant plants in North America , even small-scale amount of money can be deadly if ingested .

This plant thrives in mountainous regions and squiffy meadows . Its enchanting blooms might lure the curious , but informed tramper know to admire its beaut from a respectful length .

Historical note : Monkshood was used in ancient times for poison - tipped arrows .

Poison Oak

© Home Ground Habitats

Water Hemlock

Water hemlock , akin to poison hemlock , is one of the most toxic plants . Its intricate ashen flower are often found near water , drawing attending to its delusory smasher .

The intact plant life , especially the roots , check dangerous toxins that can be fatal if devour . Its front near stream and wetlands makes acknowledgement vital for safety .

Quite the fact : Water poison parsley ’s toxins can touch on the central nervous organization , cause severe symptom even in small doses .

Poison Oak

Foxglove

Foxglove ’s magniloquent spikes cover in bell - shaped flowers contribute a plash of color to many landscape . Despite its charm , foxglove curb digitalis , a potent heart - affecting compound .

Common in woodland clearings , its beauty contradict its potential peril if ingested . This industrial plant ’s historical use in marrow medicine contrasts with its toxic nature when mishandled .

A fascinating choice morsel : Foxglove inspired the development of digitalis drugs , crucial in treating heart conditions .

Cow Parsnip

© Juneau Empire

Jimsonweed

Jimsonweed ’s fall lily-white flowers and classifiable spiny seed pod can fascinate explorers . However , its toxicity , involve the spooky system , is well - documented .

This plant life can originate in disturbed areas and fields , displaying a audacious nature . Its psychotropic properties have historic significance but are dangerous if improperly handle .

Did you know ? jimson weed has been associated with hallucinations and delirium , making it a flora to look up to with caution .

Cow Parsnip

Castor Bean

The castor bean plant , with its glossy foliage and vivacious seed pods , captivates the eye but contains ricin , a potent toxin . Ingesting even a small amount can be calamitous , making it one of the most dangerous flora .

Although often grown for decorative intent , its seeds want careful handling to avoid inadvertent poisoning . The plant ’s outstanding appearance misrepresent its pernicious potential .

Interesting fact : Castor oil colour , infer from the seeds , is safe and widely used , unlike the toxic raw semen themselves .

Oleander

© Wikipedia

Belladonna

Belladonna ’s sorry , glossy berries and star topology - mold flowers are visually alluring , yet deceptively deadly . All share of this plant are toxic , with berries nonplus especial risks to children .

Found in woodland and along shaded way of life , its historical consumption in cosmetics and medicine contrasts with its deadly reputation . care is key when admiring its beauty .

Quirky fact : Belladonna was once used in middle drops to dilate pupil , heighten sweetheart at a dangerous monetary value .

Oleander

Poison Hemlock

© Gardening Know How

Monkshood

© Gardening Know How

Water Hemlock

© Britannica

Foxglove

© Flower Magazine

Jimsonweed

© Gardening Know How

Castor Bean

© The Spruce

Belladonna

© National Museum of Civil War Medicine