Comments on: Under Milkweed?

Question: Under Milkweed?

Karlos the Jackal — Sat, 19 Jul 2008 21:34:57 -0800

Yet another plant ID question: What's this?

I live in the upper left-hand corner of Washington State. This plant is about six feet high and is growing (very quickly) up over the back fence, from our neighbor's side.

My wife thought it might be milkweed so I Googled about but couldn't find any pics where the leaves were serrated, as this plant's are. Perhaps some milkweeds have leaves like this? I dunno.

What do you think? Also, how annoying is it going to be for us when this plant drops all its seeds or pods or whatever into our yard?

By: drleary

drleary — Sat, 19 Jul 2008 21:48:04 -0800

I don't know what they are, but I also have them in northeast Oklahoma.

By: kirstk

kirstk — Sat, 19 Jul 2008 22:20:30 -0800

I think it might be sowthistle.

(Or Senecio vulgaris = common groundsel?)

By: dws

dws — Sat, 19 Jul 2008 22:45:59 -0800

The thistle family covers a lot of ground. A few minutes on Google images looking at "thistle" or "thistle pacific northwest" will tell you what kind of thistle it isn't, and might bet you close.

By: Solomon

Solomon — Sun, 20 Jul 2008 00:13:11 -0800

I'm familiar with it, but I don't know what it's called. I bet it has bright yellow flowers that look a lot like a dandelion, only smaller?

It's going to be very annoying when it seeds itself. Thankfully, there isn't a huge tap root, so you can just pull them up quite easily.

By: TedW

TedW — Sun, 20 Jul 2008 04:29:34 -0800

It could be a hawksbeard or hawkweed.

By: bink

bink — Sun, 20 Jul 2008 06:40:53 -0800

It's some kind of thistle, I think, in which case the answer to your last question is: very. Pull it up now and minimize the number that you have to pull up next year.

By: buttercup

buttercup — Sun, 20 Jul 2008 06:45:37 -0800

Its a wild lettuce in the genus Lactuca. I'm not sure what species it is, but here is an example of what it looks like. I'm guessing it was thought to be a milkweed because the leaves contain a milky juice, something many of the wild lettuces do.

By: odinsdream

odinsdream — Sun, 20 Jul 2008 07:11:45 -0800

Seconding that it's a type of lettuce. We had a little plot of salad greens that we let go to seed and this is exactly what the top of it looks like right now.

By: mudpuppie

mudpuppie — Sun, 20 Jul 2008 11:26:45 -0800

The ever-trustworthy Western Garden book says that the weed is annual sowthistle.

By: the Real Dan

the Real Dan — Sun, 20 Jul 2008 12:43:37 -0800

I'm with Buttercup on this one.
I thought "prickly lettuce" when I saw it.
Lactuca serriola.

By: Karlos the Jackal

Karlos the Jackal — Sun, 20 Jul 2008 17:07:13 -0800

I reached over the fence and pulled a leaf off (here it is -- I should've done this first thing, I guess) -- it doesn't look like the leaf of the lettuce (shown here) but it does look an awful lot like the sowthistle -- see the second pic here.

I'm going to go with sowthistle unless someone thinks the leaf close-up says otherwise.

By: buttercup

buttercup — Sun, 20 Jul 2008 19:21:53 -0800

I can agree that it is probably sowthistle based on the second photo. The leaf shape is good and the wide whitish central vein is pretty distinctive. The flower shape is similar and I think the bracts at the base of the flower look like the sowthistle. Lactuca wasn't a bad guess given the first photo and and see a lot more of that in my fieldwork and, unfortunately, my yard. An important lesson in botany is not just knowing what something is, but knowing when you don't know something.

-Chris