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Plant Identification: SOLVED: Strange tall flowering plant with yelllow sticky sap

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Forum: Plant IdentificationReplies: 9, Views: 138
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castedo
Lexington, MA

September 26, 2007
1:59 PM

Post #4018802

Many hi-def photos of this plant are at:
http://castedo.com/gallery/main.php?g2_itemId=891

I live outside Boston Massachusetts.

This plant oozes a sticky yellow sap when freshly cut.

From the photos you can see that the yellow flowers turn into dandilion like balls of windborn seeds.

The leaves are alternate, slightly toothed and large.

It's such a strange plant, I can't wait to figure out what species it is. It's been very hard to deduce from books.

Thumbnail by castedo
Click the image for an enlarged view.

kwanjin

kwanjin
West Valley City, UT
(Zone 7a)

September 26, 2007
4:00 PM

Post #4019199

It's interesting, that's for sure. My guess would be a milkweed of some kind? Did it get this tall in one season?

tcs1366

tcs1366
Leesburg, FL
(Zone 9a)

September 26, 2007
4:36 PM

Post #4019345

OH -- i've got tons of those in the field beside my home.
the flowers are pretty though... but i'm sure it's a weed of some sort.

as for height... Mine are taller than me... 6' or so. I'd have to go out and find one to know for sure...
(i'm only 5'2" but they are much taller than me)

This message was edited Sep 26, 2007 11:44 AM

lourspolaire

lourspolaire
Delray Beach, FL
(Zone 10a)

September 26, 2007
4:42 PM

Post #4019376

I wouldn't let it go to seed if I were you. I know nothing about that plant but it seems it grew in your garden on its own and it seems poised to go invade someone else's garden. Now I wonder: if you pull it all out, will it regenerate from the severed roots next year. I wish I could help you with an ID but I've never seen that one before.

Sylvain.

tcs1366

tcs1366
Leesburg, FL
(Zone 9a)

September 26, 2007
8:41 PM

Post #4020181

OH... i was totally wrong. I went out and found the plant, and it's only about 2' high if that.

I went out and snapped a bunch of images...

I think mine is more of a 'cup plant' or compass plant -- the one that is about 6' tall.

Personally, i dont think it's in the milkweed family, as the leaves are different.

I'll keep searching... but it is a weed of some sort.
claypa
West Pottsgrove, PA
(Zone 6b)

September 26, 2007
9:10 PM

Post #4020278

I bet it's a Lactuca of some kind

http://plants.usda.gov/java/profile?symbol=LASE

Resin

Resin
Northumberland
United Kingdom
(Zone 9a)

September 26, 2007
9:44 PM

Post #4020397

Agree with Claypa. If not Lactuca, then a close relative in the same subfamily of the Asteraceae.

tcs1366

tcs1366
Leesburg, FL
(Zone 9a)

September 26, 2007
11:09 PM

Post #4020722

OH yea... that certainly looks close to the ones i have.

the whole plant and the leaves... but the flower is a tad different.

Thumbnail by tcs1366
Click the image for an enlarged view.

shadowgarden
Philo, OH
(Zone 6a)

September 26, 2007
11:18 PM

Post #4020749

Some kind of lettuce, perhaps prickly yellow lettuce.
castedo
Lexington, MA

September 27, 2007
2:31 AM

Post #4021519

Thank you for the pointer to genus Lactuca.

I was able to find this species based on that.

I believe it is Lactuca canadensis.

http://plants.usda.gov/java/profile?symbol=LACA

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