Symphytum asperum
| Symphytum asperum | |
|---|---|
|   | |
| Scientific classification   | |
| Kingdom: | Plantae | 
| Clade: | Tracheophytes | 
| Clade: | Angiosperms | 
| Clade: | Eudicots | 
| Clade: | Asterids | 
| Order: | Boraginales | 
| Family: | Boraginaceae | 
| Genus: | Symphytum | 
| Species: | S. asperum | 
| Binomial name | |
| Symphytum asperum | |
Symphytum asperum is a flowering plant of the genus Symphytum in the family Boraginaceae. Common names include rough comfrey[1] and prickly comfrey.[2] It is the tallest Symphytum species.[3] It is native to Asia, and it is known in Europe and North America as an introduced species and sometimes a weed. Symphytum × uplandicum, the naturally occurring hybrid with the common comfrey (Symphytum officinale), is the economically most important kind of comfrey.
References
- ^ BSBI List 2007 (xls). Botanical Society of Britain and Ireland. Archived from the original (xls) on 2015-06-26. Retrieved 2014-10-17.
- ^ NRCS. "Symphytum asperum". PLANTS Database. United States Department of Agriculture (USDA). Retrieved 7 December 2015.
- ^ Hills, Lawrence D. (2011-10-20). Comfrey: Past, Present and Future. Faber & Faber. ISBN 978-0-571-28091-9.
External links

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