Schumann, K.M., Gesamtbeschreibung der Kakteen (1899)
Gesamtbeschr. Kakt.
(1899)
t.
55
p. 319
name cited:
Echinocactus williamsii Lemaire
name recognized:
Echinocactus williamsii Lemaire
drawing:
T. Guerke
family: Cactaceae
subfamily: Cactoideae
tribe: Cacteae
epithet:
williamsii
Illustration contributed by:
Missouri Botanical Garden, St. Louis, U.S.A.
link to this page:
https://www.plantillustrations.org/illustration.php?id_illustration=121107
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synonyms:
