Osha Root vs Hemlock (How to Tell Them Apart)

Osha root vs hemlock is a question with no room for a near miss. Osha (Ligusticum porteri), poison hemlock (Conium maculatum) and water hemlock (Cicuta species) all belong to the carrot family, with lacy leaves and flat umbrellas of small white flowers. The two hemlocks can kill a person who eats them.

From ten steps away, all three look like tall wild parsley. At the root, they are different plants.

Osha root vs hemlock, side by side

Check every point. One match proves nothing, because each plant varies with age and season.

• Root crown. Osha has a thick collar of old, dead leaf bases at the top of the root that looks like coarse brown hair. Neither hemlock has it.
• Root. Osha root is dark chocolate brown and wrinkled on the outside, yellowish inside. Poison hemlock has a white, fleshy taproot. Water hemlock grows a cluster of thick, tuber-like roots.
• Inside the stem base. Slice a water hemlock lengthwise at the base and you see a hollow cavity crossed by horizontal plates. Osha has no chambers.
• Stem. Poison hemlock stems are smooth, hollow and blotched with purple or reddish spots all the way up. Osha shows a reddish tint mainly where the leaf stalks meet the root crown.
• Smell. Crushed osha root smells strongly of celery, with a sweet note some compare to butterscotch. Crushed poison hemlock smells musty.
• Height. Osha usually stands 50 to 130 cm. Poison hemlock reaches 1.8 to 3 m (6 to 10 feet) in its second year.
• Habitat. Osha grows in rich mountain soil at roughly 1,500 to 3,500 m, in aspen stands, conifer forest and high meadows. Poison hemlock likes roadsides, ditches and disturbed ground near water. Water hemlock wants wet feet: marshes, stream banks, ditches and wet meadows.

How to identify osha root by the bear hair

Every year osha's leaves die back, and the stalk bases stay behind on the root. After a decade of that, the top of the root wears a shaggy brown collar. People call it bear hair.

Poison hemlock is a biennial. It lives two years, flowers and dies, so it never builds up that layered collar. Water hemlock's crown is fleshy and tuberous. On a small, young osha the collar can be thin, so keep checking.

Your nose is useful but it can mislead you

Osha's smell is strong. Snap a fresh root and the celery-like scent fills the air, sharper than any celery stalk from a shop.

Herbalist Howie Brounstein pointed out the problem in a 1995 discussion foragers still quote. Every root growing in a clump of osha picks up the smell, so a hemlock tangled in with osha can smell like osha in your hand. Use smell to confirm what the crown and root already told you.

How to identify poison hemlock

Poison hemlock is the look alike most people meet first. It grows along roads, fence lines and creeks. Look for these together:

• A tall, smooth, hairless stem, hollow between the joints.
• Purple or red blotches scattered up the stem.
• Fern-like, finely cut leaves and a musty smell when crushed.
• A white taproot with no hairy collar.

Wear gloves. The University of Maryland Extension notes some people react on the skin from contact alone.

Water hemlock is the one with chambers in the root

Water hemlock is often called the most poisonous plant in North America. It is also the one most likely to grow near osha, along a mountain stream.

Cut the base of the stem lengthwise and you see stacked air chambers. The USDA also points to the leaflets. In water hemlock, the side veins run to the notches between the teeth instead of to the tooth tips. Western water hemlock (Cicuta douglasii) can carry purplish spots on the stem too, so spots alone don't tell you which hemlock you have.

If the ground is soggy, assume any carrot-family plant there is water hemlock until the root proves otherwise.

Other osha look alikes

United Plant Savers names mountain parsley and young biscuitroots (Lomatium) alongside poison hemlock as plants inexperienced harvesters dig by mistake. Hemlock parsley (Conioselinum) is another. None has osha's hairy crown and dark, strongly scented root together.

Experienced harvesters still get this wrong

Foraging forums are full of people with years in the field posting photos and asking whether a plant is osha. The old hands give the same answer every time. Learn it in person, next to someone who has dug hundreds of them.

Osha grows slowly and is usually more than 10 years old when its root is dug, according to the Pollinator Partnership's plant guide. And United Plant Savers lists it as At-Risk, with reports of small stands of 100 plants or fewer disappearing after heavy harvesting. One wrong guess with a hemlock can kill.

That is why most people who want osha buy it from a maker who knows the plant. Read more about its history in our complete guide to osha root.

What to check on an osha label

• The Latin name, Ligusticum porteri, printed on the bottle. Some sellers use "osha" for related Ligusticum species.
• Where the root came from. A maker who names the region knows where they harvest.
• The glass. Dark amber glass is a step in the right direction. Dark Miron glass is the gold standard, and it is what we use.
• The form. A tincture (an alcohol extract) keeps for years in dark glass and goes into water or under the tongue in seconds. Dried root needs storing and preparing first.

Bear Root is our osha root tincture. The label names Ligusticum porteri, a mountain plant of Northern Mexico, where osha grows in Chihuahua and Sonora. The root is harvested from those mountains, extracted, and bottled in 50 ml of dark Miron glass. Simple ingredients: premium quality extract. It tastes earthy and warming, with that same sharp, celery-like bite you would smell on the mountain.

Most people take 1 to 2 droppers a day. Hold it under the tongue for 20 to 30 seconds and swallow, or stir it into water, tea, juice or a smoothie. A bottle lasts 30 to 50 days at that rate. It sits in a desk drawer, and nobody has to cut open a root in a wet meadow.

Bear Root – Osha Root Tincture

50 ml dropper bottle. Ligusticum porteri from the mountains of Northern Mexico.

Add to bag

Bear Root considerations

Our recommendation, from the product page: contains alcohol. Not recommended during pregnancy. If you're nursing or taking medication, ask your doctor before using it.

Questions people ask

Is bear root the same plant as osha?

Yes. Bear root is a common name for osha, Ligusticum porteri, from the story that bears dig up the root and chew it. We cover the names in more detail in bear root vs osha root.

What is the fastest way to tell osha from poison hemlock?

Look at the top of the root. Osha has a hairy brown collar of old leaf bases and a dark brown root that smells strongly of celery, while poison hemlock has a white taproot and a smooth, purple-blotched hollow stem.

Does bear root grow in the same places as hemlock?

Sometimes. Osha grows high in mountain forest and meadows and poison hemlock mostly lower on disturbed ground, so the bear root vs hemlock mix-up happens most often with water hemlock along wet streamsides.

Can you identify osha by smell alone?

No. The celery scent is strong, but roots growing inside an osha patch can pick it up, so check the crown, the root and the stem base as well.