Assertion: russian comfrey | /r/HasProperty | cultivated perennial herb
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Source sentences:
text: The Russian comfrey (Symphytum × uplandicum Nyman) is a cultivated perennial herb reaching about 1 m high with large, lance-shaped hairy leaves, hairy stems and magenta-pink flowers (Bareeba et al., 1992; Göhl, 1982; Boonman, 1993; Teynor et al., 1997).