Rudbeckia hirta (Black-Eyed Susan)

Rudbeckia hirta (Brown-Eyed Susan) in the hayfield on 7-9-13, #161-9.

Black-Eyed Susan

Rudbeckia hirta

(Likely Rudbeckia hirta var. pulcherrima)

rud-BEK-ee-ah HER-tuh

Synonyms of Rudbeckia hirta (3) (Updated on 12-26-21 from Plants of the World Online): Centrocarpha hirta (L.) D.Don ex G.Don, Coreopsis hirta (L.) Raf., Helianthus hirtus (L.) E.H.L.Krause
Synonyms of Rudbeckia hirta var. pulcherrima Farw. (23) (Updated on 12-26-21 from POWO): Brauneria serotina (Sweet) Bergmans, Obeliscotheca flava (T.V.Moore) Nieuwl. & Lunell, Obeliscotheca flava var. perbracteata (Lunell) Nieuwl. & Lunell, Rudbeckia bicolor Nutt., Rudbeckia flava T.V.Moore, Rudbeckia flava var. perbracteata Lunell, Rudbeckia flexuosa T.V.Moore, Rudbeckia hirta var. corymbifera Fernald, Rudbeckia hirta var. lanceolata (Bisch.) Core, Rudbeckia hirta f. pleniflora Moldenke, Rudbeckia hirta var. rubra Clute, Rudbeckia hirta var. sericea (T.V.Moore) Fernald, Rudbeckia hirta var. serotina (Nutt.) Core, Rudbeckia longipes T.V.Moore, Rudbeckia sericea T.V.Moore, Rudbeckia serotina Nutt., Rudbeckia serotina var. corymbifera (Fernald) Fernald & B.G.Schub., Rudbeckia serotina var. lanceolata (Bisch.) Fernald & B.G.Schub., Rudbeckia serotina f. pleniflora (Moldenke) Fernald & B.G.Schub., Rudbeckia serotina f. pulcherrima (Farw.) Fernald & B.G.Schub., Rudbeckia serotina f. rubra (Clute) Fernald & B.G.Schub., Rudbeckia serotina var. sericea (T.V.Moore) Fernald & B.G.Schub., Rudbeckia strigosa Nutt.

Rudbeckia hirta L. is the accepted scientific name for this species of Rudbeckia. The genus and species were named and described as such by Carl von Linnaeus in the second volume of the first edition of Species Plantarum in 1753.

Accepted Infraspecific Names (4) (Updated on 12-26-21 from POWO: Rudbeckia hirta var. angustifolia (T.V.Moore) Perdue, Rudbeckia hirta var. floridana (T.V.Moore) Perdue, *Rudbeckia hirta var. hirta (autonym), Rudbeckia hirta var. pulcherrima Farw. *When infraspecific taxon are named, an autonym (“type-specimen”) is automatically generated whose description is closest to the (original) species. All have their own list of synonyms… Plants in Missouri are normally assigned to Rudbeckia hirta var. pulcherrima.

Rudbeckia hirta var. pulcherrima Farw. is the accepted scientific name for this variety of Rudbeckia. It was named and described as such by Oliver Atkins Farwell in Report (Annual) of the Michigan Academy of Science, Arts, and Letters in 1904.

As of 12-26-21 when this page was last updated, Plants of the World Online lists 24 accepted species in the Rudbeckia genus. It is a member of the plant family Asteraceae with 1,678 genera. Those numbers could change as updates are made by POWO. The number of genera in the family changes quite often, up and down… 

Distribution map of Rudbeckia hirta from Plants of the World Online. Facilitated by the Royal Botanic Gardens, Kew. Published on the Internet; http://www.plantsoftheworldonline.org/. Retrieved on December 26, 2021.

The above distribution map for Rudbeckia hirta is from the Plants of the World Online and includes the species and lower taxon. Rudbeckia hirta var. pulcherrima is the most widespread. Areas in green are where the species is native and purple where it has been introduced. The maps on the USDA Plants Database are similar but also includes Montana. You can go to the links and click on the subordinate taxon to see their maps.

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.

Rudbeckia hirta in the back pasture on 7-9-13, #161-10.

We have A LOT of Black-Eyed Susan on the farm and you can see them just about anywhere in the countryside.

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.

Rudbeckia hirta in the garden with the potatoes on 6-24-17, #349-68.

Whenever I see any of these plants in the garden or flower beds I just let them grow. Never hurts to have a few pollinators here and there for bees and butterflies.

Rudbeckia hirta in front of the chicken house next to the Equisetum hyemale (Horsetail) on 7-9-17, #355-40.

USEFUL INFORMATION:
Family: Asteraceae (Compositae)
Origin: Native to most of the United States and Canada at least.
Zones: USDA Zones 3a-9b (-40 to 25° F)
Size: 24-36” tall x 12-24” wide
Light: Sun
Soil: Average, well-drained soil
Water: Average
Tolerates: Heat, drought, and just about any soil type.
Maintenance: Can deadhead to increase more flower production.

Rudbeckia hirta in the northeast corner bed next to the old foundation on 7-19-17, #357-66.

Rudbeckia hirta is very self-seeding so deadheading when they are in your flower beds may be a good idea. There are many popular cultivars of Rudbeckia hirta and I grew three in 2017.

Various Native American tribes used Rudbeckia hirta as an herbal remedy for colds, flu, infections, swelling, and snakebite. Apparently, all parts of this plant are NOT edible, though.

<<<<2018>>>>

Rudbeckia hirta on 10-3-18, #514-21.

I had started getting more into the identification of wildflowers on the farm which sometimes required multiple photos of various parts of the plants.

Rudbeckia hirta flowers on 10-3-18, #514-22.

Rudbeckia hirta seems pretty self-explanatory for the most part, but there are three other varieties of Rudbeckia hirta besides the species. Rudbeckia hirta var. angustifolia, Rudbeckia hirta var. floridana, and Rudbeckia hirta var. pulcherrima are the other three. Besides that, the Missouri Department of Conservation website says there are nine species of Rudbeckia in Missouri. From a distance, you cannot tell the difference. Missouri’s Rudbeckia hirta has been further classified as Rudbeckia hirta var. pulcherrima. Some flowers may have a maroon color closer to the head but I have never seen any like that except for cultivars.

Rudbeckia hirta stems on 10-3-18, #514-23.

 <<<<2019>>>>

Rudbeckia hirta (Black-Eyed Susan) on 5-25-19, #576-66.

 

Rudbeckia hirta (Black-Eyed Susan) on 6-5-19, #583-27.

 

Rudbeckia hirta (Black-Eyed Susan) on 6-9-19, #585-18.

 

Rudbeckia hirta (Black-Eyed Susan) on 6-14-19, #589-9.

 

Rudbeckia hirta (Black-Eyed Susan) and Rudbeckia fulgida var. sullivantii ‘Goldsturm’ on 6-26-19, #596-15.

 

Rudbeckia hirta (Black-Eyed Susan) on 7-22-19, #604-30.

 

Rudbeckia hirta (Black-Eyed Susan) on 7-22-19, #604-31.

 

Rudbeckia hirta (Black-Eyed Susan) on 7-22-19, #604-32.

 

Rudbeckia hirta (Black-Eyed Susan) on 7-22-19, #604-33.

 

Rudbeckia hirta (Black-Eyed Susan) on 7-22-19, #604-34.

 

Rudbeckia hirta (Black-Eyed Susan) on 7-22-19, #604-35.

<<<<2021>>>>

Rudbeckia hirta (Black-Eyed Susan) on 10-22-21, #849-14.

Even on October 22 in 2021 there were still quite a few Rudbeckia hirta flowering on the farm. We have had a mild fall with no “F” yet. Many wildflowers will regrow and bloom after the hay is cut while the older plants that didn’t get cut have already fizzled out.

I have enjoyed photographing and learning about the many wildflowers growing on the farm and other areas. My farm is in Windsor, Missouri in Pettis County (Henry County is across the street and Benton and Johnson aren’t far away). I have grown over 500 different plants and identified over 100 species of wildflowers (most have pages listed on the right side of the page). 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 few horticulturalists 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. Some sites may not be up-to-date but they are always a work in progress. 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 thebelmontrooster@yahoo.com. I would enjoy hearing from you especially if you notice something is a bit whacky.

FOR FURTHER READING:
PLANTS OF THE WORLD ONLINE (GENUS/SPECIES)
INTERNATIONAL PLANT NAMES INDEX (GENUS/SPECIES)

TROPICOS (GENUS/SPECIES)
FLORA OF NORTH AMERICA (GENUS/SPECIES)
WIKIPEDIA (GENUS/SPECIES)
USDA PLANTS DATABASE
USDA PLANT GUIDE
MISSOURI BOTANICAL GARDEN
MISSOURI PLANTS
iNATURALIST
WILDFLOWER SEARCH
DAVE’S GARDEN
ILLINOIS WILDFLOWERS
MINNESOTA WILDFLOWERS
KANSAS WILDFLOWERS AND GRASSES
PFAF (PLANTS FOR A FUTURE)
GO BOTANY
LADY BIRD JOHNSON WILDFLOWER CENTER
FLORA FINDER
FRIENDS OF THE WILDFLOWER GARDEN
GARDENIA
NORTH CAROLINA STATE UNIVERSITY EXTENSION

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. 🙂

 

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