Globe Flatsedge, Hedgehog Club Rush
Synonyms of Cyperus echinatus (18) (Updated on 5-11-21 from Plants of the World Online): Cyperus ovularis (Michx.) Torr., Cyperus ovularis var. americanus Boeckeler, Cyperus ovularis var. sphaericus Boeckeler, Cyperus ovularis var. wolfii (Alph.Wood) Kük., Cyperus wolfii Alph.Wood, Kyllinga ovularis Michx., Mariscus bracheilema Steud., Mariscus drummondii Steud., Mariscus echinatus (L.) Elliott, Mariscus globulosus Urb., Mariscus ovularis (Michx.) Vahl, Mariscus ovularis var. tenellus Torr., Mariscus retroflexus Willd. ex Kunth, Mariscus rivularis Walp., Mariscus sphaericus Willd. ex Kunth, Mariscus sphaerocephalus Steud., Schoenus umbellatus Jacq., Scirpus echinatus L.
Cyperus echinatus (L.) Alph.Wood is the correct and accepted scientific name for the Globe Flatsedge. It was named and described as such by Alphonso Wood in A Class-book of Botany in 1861. It was first named and described as Scirpus echinatus by Carl von Linnaeus in the first edition Species Plantarum in 1753.
The genus, Cyperus L., was named and described as such by Carl von Linnaeus in the first volume of the first edition of Species Plantarum in 1753.
Plants of the World Online lists 940 species in the Cyperus genus (as of 5-11-21 when I last updated this page). It is a member of the plant family Cyperaceae with 92 genera. Those numbers could change as updates are made.
The above distribution map for Cyperus echinatus is from Plants of the World Online. Areas in green are where the species is native. The map on the USDA Plants Database for the United States and Canada is the same. The species could have a broader range than the maps show
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.
THERE ARE SEVERAL LINKS AT THE BOTTOM OF THE PAGE FOR FURTHER READING AND TO HELP WITH A BETTER POSITIVE ID.
There are quite a few Cyperus echinatus growing on my farm in west-central Missouri. However, some information suggests they only grow in the southern half of the state and in the upper northeast corner. This species easily identified by its tight globose flower clusters which no other species of Cyperus has.
The Cyperus echinatus here on the farm grow right out in the pasture in several locations. Habitats mentioned online include upland prairies, sand prairies, glades, dry upland forests, pastures, disturbed sites, gravel bars, roadsides, railroads, ditches, rocky and sandy soils.
They have 3-sided triangular stems with a reddish base. Their leaves look like grass at a first glance so may go noticed until they start to flower and produce fruit. If you dig or pull them up you will find a culm with knotty rhizomes.
The Cyperus echinatus grows up to around 3′ tall. The flowering stems are topped with 3-12 globose inflorescences with 60-110 or more spikelets that radiate from a central point. The cluster of flowers are subtended by 4-7 leaf-like bracts.
In 2021, I hope to take more close-ups of the flowers, stems, leaves, and culms, and roots.
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 email@example.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)
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
NOTE: The figures may not match on these websites. It depends on when and how they make updates and when their sources make updates (and if they update their sources or even read what they say). 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. 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 but I do get behind. We are all a work in progress. 🙂