Late Boneset, Late Thoroughwort
Eupatorium serotinum Michx. is the correct and accepted scientific name for the Late Boneset. It was named and described as such by André Michaux in Flora Boreali-Americana (Michaux) in 1803.
The genus, Eupatorium L., was named and described as such by Carl von Linnaeus in the second edition of the first volume of Species Plantarum in 1753
As of 12-22-21 when this page was last updated, Plants of the World Online lists 61 accepted species in the Eupatorium genus. It is a member of the plant family Asteraceae with a total of 1,678 genera. Those numbers are likely to change as updates are made on POWO. The number of genera in this family fluctuates quite often.
The distribution map above of Eupatorium serotinum is from Plants of the World Online. Areas in green are where it is native and purple where it has been introduced. The map on the USDA Plants Database for North America is similar.
The map on iNaturalist shows where members have made observations. Anyone can join and it is a great website to confirm and share your observations. The maps on iNaturalist are continually updated as members post new observations.
THERE ARE SEVERAL LINKS AT THE BOTTOM OF THE PAGE FOR FURTHER READING AND TO HELP WITH A BETTER POSITIVE ID.
I took the photos of the Eupatorium serotinum in the pasture next to my backyard. Of course, there are several small colonies here and there but this one was quite handy. I have identified three species of Eupatorium here on the farm and E. serotinum and E. altissimum were somewhat difficult to tell apart. Eupatorium perfoliatum is easy to tell because of its leaves.
I apologize for not writing descriptions at the moment. I am busy updating plant pages and writing new pages for wildflowers I identified over the summer (plus adding more photos to previously published pages). Writing descriptions in my own words can be a lengthy process, so I decided to just make new pages and come back later and write the descriptions. This is a winter project but sometimes I get behind and it takes longer. I need to continually update because plant names change, the number of species and genera fluctuates, and I want to be as accurate as I can. There are several very good websites below that can help with a positive ID. We are all a work in progress.
I have enjoyed photographing and learning about the many wildflowers growing on the farm and other areas. I have grown over 500 different plants and most have pages listed on the right side of the blog. I am not an expert, botanist, or horticulturalist. I just like growing, photographing and writing about my experience. I rely on several websites for ID and a horticulturalist I contact if I cannot figure them out. Wildflowers can be somewhat variable from location to location, so sometimes it gets a bit confusing. If you see I have made an error, please let me know so I can correct what I have written.
I hope you found this page useful and be sure to check the links below for more information. They were written by experts and provide much more information. If you can, I would appreciate it if you would click on the “Like” below and leave a comment. It helps us bloggers stay motivated. You can also send an email to me at firstname.lastname@example.org. I would enjoy hearing from you.
FOR FURTHER READING:
PLANTS OF THE WORLD ONLINE (GENUS/SPECIES)
INTERNATIONAL PLANT NAMES INDEX (GENUS/SPECIES)
FLORA OF NORTH AMERICA (GENUS/SPECIES)
WORLD FLORA ONLINE (GENUS/SPECIES)
MSU-MIDWEST WEEDS AND WILDFLOWERS
USDA PLANTS DATABASE
LADY BIRD JOHNSON WILDFLOWER CENTER
KANSAS WILDFLOWERS AND GRASSES
NATIONAL WILDLIFE FEDERATION
NOTE: The data (figures, maps, accepted names, etc.) may not match on these websites. It depends on when and how they make updates and when their sources make updates. Some websites have hundreds and even many thousands of species to keep up with. Accepted scientific names change periodically and it can be hard to keep with as well. Some of the links may use a name that is a synonym on other sites. In my opinion, Plants of the World Online by Kew is the most reliable and up-to-date plant database and they make updates on a regular basis. I make updates “at least” once a year and when I write new pages or add new photos but I do get behind. We are all a work in progress. 🙂