'alpina var. siberica' clematis References
Book (Oct 2001) Page(s) 348-349. Includes photo(s).
Magazine (1877) Page(s) 266. Clematis Alpina sibirica, Atragene sibirica (Dc.); blanc.
Book (1820) Page(s) 13. Atragene alpina....sibirica. Perennial. Hardy
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