I can see X✋︎ western poison ivy ✋︎X Toxicodendron rydbergii

X✋︎ DO NOT TOUCH ✋︎X.

Easily-confused when 🌱︎ young (ankle- to knee-high)! Identification information from MSU, poison ivy quiz.
If each leaf contains:	with lateral (side) leaflets:	and terminal (end) leaflet:	and your specimen has/is a:	then you have:

5 leaflets	—	—	trailing vine or climbing vine	Virginia creeper Parthenocissus quinquefolia
3 or 5 leaflets	—	—	woody stem (tree)	lookalike boxelder maple Acer negundo
3 leaflets	asymmetric, with no petiolule	short petiolule	trailing vine	lookalike 🍓︎ strawberry genus Fragaria
		medium-length petiolule	woody stem, with prickles if plant is above knee-high	lookalike raspberry genus Rubus
			trailing vine or climbing vine, with old growth held tight to host by 1000s of aerial roots, Asia or North America (outside the West, usually)	sister-species eastern poison ivy Toxicodendron radicans
			shrub, North America (outside of California and southeastern 🇺🇸 USA)	this plant, please continue below …

Verify with 🔍︎ images.

X🔥︎ DO NOT BURN 🔥︎X. Avoid all contact with smoke.

If contact with smoke, seek ⚕︎ medical attention with all due speed.

X⛽︎✂︎ DO NOT USE HEDGECLIPPERS ✂︎⛽︎X. Neither petrol/gasoline nor electric:

I met a guy whose petrol/gasoline hedgeclippers went through poison ivy before he noticed—plant fragments hit his lungs, the poison entered his bloodstream, hitting all body organs horribly, and putting him under ⚕︎ medical care for months.
Perhaps a 😷 P100 HEPA respirator/filter mask would have helped, but I suggest sufficient PPE and ✂︎ hand tools, nice and slow!

X✋︎ DO NOT TOUCH ✋︎X. To avoid skin rash and irritation urushiol-induced contact dermatitis, avoid contact with all parts of this plant with your ✋︎ skin, 👕︎ clothing, 👟︎ shoes and 🐕︎ pets:

If contact with ✋︎ skin, quickly remove the oily-feeling urushiol with alcohol and a rag, or with soap and water. I read that after 10 minutes, most of the agent has been absorbed into the skin—so if you notice contact, try to remove within this time.
If contact with 👕︎ clothing or 👟︎ shoes, wash them. For fabric, use normal laundry (some sources say in hot water; this author finds warm water adequate). For leather and suede, we have no idea (this author finds re-contact from boots and gloves minor).
If contact with 🐕︎ pets, we have no idea.
If contact with ✂︎ tools, I try to avoid touching the blade until it has gone through soil or non-Toxicodendron wood a few times.
Identification, first aid and recommendations from 🇺🇸 USA CDC NIOSH and its Protecting Yourself from Poisonous Plants from 🇺🇸 USA CDC NIOSH. ▶︎ Video How Poison Ivy Works by 🇺🇸 USA CDC NIOSH.
Prevention and treatment from National Capital Poison Center. Prevention and treatment from MSU. (page 2)

👥︎ People differ greatly in their reaction to this plant—some react strongly, some are immune, and most are in the middle:

On contact with the skin of susceptible individuals, a rash appears in a few hours to a day or two.
Without treatment, it clears up in 7 to 14 days.
With treatment, it clears up in a week or two.
This author finds minor contact ignorable. But If the urge to itch is strong, an antihistamine spray or pen (perhaps with 2% diphenhydramine) [disrecommended by this source] , perhaps followed by (after letting previous soak in) a commercial pink lotion, offers adequate relief for a few hours—use and repeat as directed by the labels.
One time, when this author had unseen contact with X✋︎ Pacific poison oak Toxicodendron diversilobum ✋︎X on the job, covering 100% of 💪︎ both arms, with patches on trunk caused by urushiol moved during a post-work shower, I did seek ⚕︎ medical attention.

Despite its common name, not ☠︎ poisonous. Despite its scientific botanical name, not ☠︎ toxic, either. But a strong allergen to 👥︎ 70% of humans (85% after several exposures). [1]

Despite its common name, not an ☙ ivy genus Hedera, either.

Instead, part of sumac genus Toxicodendron in cashew/sumac family Anacardiaceae.

Native to North America outside of California and southeastern 🇺🇸 USA. ▭ 🌎︎ Map by county (🇺🇸 USA-48) (colors).

Uses by native peoples
(Ethnobotany database)

Toxicodendron hosts caterpillars of 5 species
of butterflies and moths, in some areas. Many 🐦︎ birds eat and love 🍒︎ poison ivy berries, and can be an important part of their diet. Other 🐢︎🐇︎🐜︎🐛︎ animals eat the plant itself.

Thus, this author removes poison ivy only from footpaths, and back one big step. More than one big step into the forest or bush, I leave alone, unless causing trouble somehow. Control Practices (page 3)

For 👥︎ humans, however, all parts of this plant are harmful, due to an oily-feeling group of chemicals called urushiol (see chart above).

At the end of the growing season, leaves turn bright red before most other deciduous plants.

I can see X✋︎ western poison ivy ✋︎X Toxicodendron rydbergii

Learn more about X✋︎ western poison ivy ✋︎X Toxicodendron rydbergii

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