Poison Hemlock, beware

[Kms]

For any who aren’t aware (I wasn’t), poison hemlock (Conium maculatum) is not only common but increasingly widespread across Pennsylvania, particularly in low-lying areas along roadsides, field edges, and near creeks and streams. The recent rain might also trigger an explosion of growth.

Beware stems with purple splotches!

 

[Nymph-wristed]

Thanks, Mason. A few of us were probably rolling around in that stuff last weekend.

Love the avatar photo too 😉

 

[rancid waders]

I thought it was ragweed already. Much worse, thanks for the heads up.

 

[Kms]

Although the warning from the meteorologist says it causes severe rashes, my understanding is that’s not always the case. The greater risks are ingestion, inhalation (even from sniffing the flowers), and exposure to mucous membranes.

Unlike the poison ivy irritant, this stuff contains neurotoxins which require more careful cleaning and can have nastier consequences.

 

[falcon]

I thought that was called poison hogweed. Really bad stuff,

 

[tomgamber]

I thought that was called poison hogweed. Really bad stuff,

Yes, but once you eclipse a certain income level you are required to call it Hemlock.🤣

 

[Kms]

Yes, but once you eclipse a certain income level you are required to call it Hemlock.🤣

Pass a few more levels and you call the groundskeeper.

 

[Tigereye]

Already got my first dose of ivy. I knew it was there from past experience but it was my only access to a rising trout.

I got the ivy, and the fish. I got to return the fish but not the ivy.

I won't mess with hogweed. Stuff is nasty.

Hemlock looks like giant Queen Anne's Lace. I've seen it but managed to stay clear.

 

[Mike]

I thought that was called poison hogweed. Really bad stuff,

No, hogweed is a common name for cow parsnip, another plant that is apparently becoming more common in Pa based on a range map. I have never seen it in Pa. It is also poisonous to the touch.

Minor amounts to substantial stands of poison hemlock are now common along a couple of Lehigh Valley streams where I’ve spotted it over the last three years. Also saw it getting started at a spot along Kettle Ck last summer. The plants that I saw last week and this week were already 18”-24” tall, but no flower was present yet. Heed the op description above since you don’t want to mistake poison hemlock for queen anne’s lace.

 

[Cznymph]

No, hogweed is a common name for cow parsnip, another plant that is apparently becoming more common in Pa based on a range map. I have never seen it in Pa. It is also poisonous to the touch.

Minor amounts to substantial stands of poison hemlock are now common along a couple of Lehigh Valley streams where I’ve spotted it over the last three years. Also saw it getting started at a spot along Kettle Ck last summer. The plants that I saw last week and this week were already 18”-24” tall, but no flower was present yet. Heed the op description above since you don’t want to mistake poison hemlock for queen anne’s lace.

Giant hogweed (Heracleum mantegazzianum) is not the same plant as Cow Parsnip (Heracleum maximum)

 

[troutbert]

I thought that was called poison hogweed. Really bad stuff,

They are two different plants.

 

[Mike]

Giant hogweed (Heracleum mantegazzianum) is not the same plant as Cow Parsnip (Heracleum maximum)

Tell it to North Carolina State.

Heracleum maximum (American Cow-parsnip, American Hogweed, Cow Parsnip, Giant Hogweed, Indian Celery, Indian Rhubarb) | North Carolina Extension Gardener Plant Toolbox

 

[5footfenwick]

Green stem with purple blotches and no hairs=Poison Hemlock

Green stem with purple blotches and thick white hairs= Giant Hogweed

Green stem without purple blotches and thin white hairs =Cow parsnip

~5footfenwick

 

[JG63]

Aarrgh! Like we don’t have enough to worry about - how did this stuff invade PA? Naturally or accidentally?

 

[Cznymph]

Tell it to North Carolina State.

Heracleum maximum (American Cow-parsnip, American Hogweed, Cow Parsnip, Giant Hogweed, Indian Celery, Indian Rhubarb) | North Carolina Extension Gardener Plant Toolbox

I really don’t care who said it, it’s still incorrect.