Cup Plant (Silphium perfoliatum)

A prairie plant that likes wet areas, the stems of Cup Plant (Silphium perfoliatum) grow 3-8 feet. Note the top two leaves enclose the stem to form a cup that collects water when it rains. The species epithet perfoliatum, "through the leaves," describes this leaf arrangement. I've seen birds take a sip of water out of the cup. The yellow daisy-like flower heads bloom from July to September in the Chicago bioregion. Here Cup Plant is being used as a shoreline restoration plant at the Chicago Botanic Garden.
Rosin Weed (Silphium integrifolium)

Related to Cup Plant and also a prairie plant, Rosin Weed (Silphium integrifolium) has paired stalkless leaves that are very rough. Like its relative the Cup Plant, Rosin Weed has yellow daisy-like flower heads that bloom from July to September in our area. The plant grows 2-6 feet and produces a gummy resin. This stand of Rosin Weed at the Chicago Botanic Garden has been planted in a well-drained area farther from the water than Cup Plant because the plant likes dry to medium prairies.


Comments: 9
I am always amazed at how nature adapts (i.e. the flower cupping itself to catch water). Everything seems to serve a purpose. It looks like the Rosin Weed is wild? Would this be something that avid gardeners would poo-poo in their own gardens or something that is welcome? I'm always curious as to what is considered acceptable to someone who is an expert gardener. Although the cultivated varieties are beautiful in color and arrangement, I have friends who have put together beautiful "wild flower" gardens that are stunning.
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Jennifer is the Associate Editor of Gather.
You might want to take a look at
http://www.illinoisprairie.info/InternatBoulevard.htm
Jim
However, while cup plant and rosin weed can be planted as they have been in the two locations in these pictures, they can grow very tall and might not be appropriate for some gardens.
My eyes have come to prefer a wild-looking landscape more than a manicured look.
Thanks for your interest.
We do love our roses, though...
My neighbor just introduced me to Cup Plant a few days ago. It is evidently native to Iowa, as well. I'm new to gardening and would like to incorporate some native plants and tall grasses into our landscape. For now, we have mostly grass that needs to be mowed as we had to get something growing on our new lot to prevent erosion. I'm hoping I can do a mix of native and otherwise and make it all work. I'll keep an eye on your articles for more ideas.
Nearly everyone thrills to receiving a rose or a bouquet of roses or looking at a rose in its prime. So your love of roses says you are normal.
You are right about the advantages of gardening using native plants. We need to do more of that.
There's nothing like prairie plants to stabilize soil and hold erosion down because mature prairie plants have very deep roots. There's a poster on the Internet that shows this. Go to:
http://images.google.com/images?q=roots%20prairie%20plants%20conservation&hl=en&lr=&client=safari&rls=en&sa=N&ie=UTF-8&oe=UTF-8&tab=wi
Click on the left image titled Root Systems of Prairie Plants to enlarge it. It still may be too small to read the names of the plants, but the plant on the farthest left is Kentucky blue grass, a typical lawn grass in my area. The other plants are prairie plants. Note that the roots of Kentucky blue grass are only a few inches deep whereas the roots of these prairie plants extend from 2 to 15 feet. If you want to know the names of the other plants, let me know. I have that poster hanging right here in my office.
Good luck in your landscaping efforts.
Thanks for the info! I had no idea the root system on native plants were so deep. I'm starting with just a few plants and will keep adding new ones a little at a time. One of our local shops had a big sale so I bought a few flowers (some native, some not) to get us started. I found a couple of small trees on the internet I'd like to plant this Fall. And my husband loves tall grasses so I'm on the lookout for those, preferably native.
Now, I'm off to check out your link. Again, thanks so much!