I got seed for "silphium integrifolium" in a trade several years ago, and managed to raise a few seedlings. One of the plants is still alive, and comes back with impressively large, prominently veined leaves every year - but it has never bloomed. It is less drought-resistant than the other two silphium species in our garden, suffering from wilt in dry periods. The leaves don't resemble photos of the species I've found on the web, so I can't be sure of the identity. I hope that one year it will bloom and I'll have a better shot at IDing this.
This plant used to grow in our garden, but it slipped away...
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PlantLinks to other web pages about Silphium terebinthinaceum
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|Curtis Clevinger||Apr 18, 2006||This is Silphium terebinthinaceum (Prairie-Dock), The species you called it has leaves on the flowering stalk. This plant takes awhile before it takes off. It took ours 3 years. Then it really bloomed (12 feet). I have most of the species in this genus (my wife did here PhD on this group). We have had good luck growing all of the species in Ohio (even the ones from mid Texas).|
Thanks Curtis. I figured out a while back that I got the species mixed up, but never fixed the website. It's been about four years in my garden now, so hopefully it will finally bloom this year.
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April 18, 2006