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Engler, H.G.A., (1900-1968)
Pflanzenr.

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vol. 280(X-XVI): (1921)

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p. 644 f. 52

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name cited:
Hieracium nigrescens Willd.
name recognized:
Hieracium nigrescens Willd.

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family: Compositae
tribe: Lactuceae
subtribe: Hieraciinae

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epithet: nigrescens

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Illustration contributed by:
University of Toronto Library, Canada

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link to this page:
https://www.plantillustrations.org/illustration.php?id_illustration=181819

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