Can anyone identify this plant?

kr222(6b)August 23, 2010

I found this near I local creek in PA. I am hoping that it is a variety of Asclepias to feed my new monarch caterpillars. They seem to prefer the old leaves they arrived on and are ignoring this new foliage. Did I find the wrong plant? I'll try to attach pictures. These leaves came off of a plant around 4 feet high along the edge of the creek (not in the water).

Thanks for the help everyone!

Here is a link that might be useful: Alternate link to the pictures

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I don't think it is Asclepias. Asclepias would ooze a white sap when you pull off a leaf.

    Bookmark   August 23, 2010 at 4:09PM
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I think you're right. The cats won't touch the stuff and there is no white sap. I was able to go to a local creek and find some with large leaves. The second I popped one off...lots of sap. Huge relief. Thanks for your help.

    Bookmark   August 25, 2010 at 12:02PM
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Purple Loostrife

    Bookmark   September 20, 2010 at 11:21AM
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jaybirdy(5north/central Illinois)

It kind of looks like it could be bloodflower(asclepius currasavica).Actually,not all milkweeds have sticky white sap and bloodflower is one of those.It's hard to make an accurate ID without seeing the flower.If it had red and orange ,or plain yellow star shaped flowers it would be bloodflower.It could also be in the dogbane family which is closely related to milkweeds.A flower description would greatly help in identifying it.

    Bookmark   October 10, 2010 at 12:19PM
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I was walking near the creek when I saw this plant finally in bloom. It definitely didn't have a flower like other milkweed. It had individual, soft yellow flowers. They were large...about the size of a quarter and the petals formed an open cup. Luckily I was able to find some milkweed at another creek and the monarchs were alright.

    Bookmark   October 10, 2010 at 4:23PM
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tepelus(6a SW MI)

Perhaps they might have been some type of oenothera, primrose.


    Bookmark   October 11, 2010 at 7:38AM
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I typed in primrose to see images of it. It looked just like photos labeled evening primrose. You've solved my mystery. Thanks!

    Bookmark   October 11, 2010 at 8:05AM
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tepelus(6a SW MI)

Cool! Your description of the flowers led me to think they were evening primrose. Nice that the mystery is solved. :)


    Bookmark   October 12, 2010 at 7:19AM
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Oenothera (evening primerose) has alternate leaves, while the leaves on your plant are opposite.

    Bookmark   October 16, 2010 at 4:54PM
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