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Morphological, cytological, and flavonoid variability of the Arnica angustifolia aggregate (Asteraceae)

by Downie, Stephen R.
Published in Canadian Journal of Botany (1988)

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The taxonomy of Arnica frigida and A . louiseana (Asteraceae)

by Downie, Stephen R., Denford, Keith E.
Published in Canadian Journal of Botany (1986)

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Le statut des Euphrasia borealis , E . nemorosa et E . stricta dans l'est de l'Amérique du Nord : une analyse numérique

by Downie, Stephen R., Quintin, Andrée, McNeill, John
Published in Canadian Journal of Botany (1988)

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