Assertion: prickly comfrey | /r/HasProperty | s. asperum
Facets:
Source sentences:
text: There are about 25 species of the herb, including prickly comfrey (S. asperum ) and Russian comfrey (S. X uplandicum, known as okopnik).
text: Comfrey’s other, reasonably common, relatives are prickly comfrey (S. asperum) and Russian comfrey (S. x uplandicum), which is a hybrid between comfrey and prickly comfrey.