Geel, P.C. van, Sertum Botanicum (1827-1832)
Sertum Bot.
vol. 3 (1831)
name cited:
Penstemon diffusus Douglas
name recognized:
Penstemon serrulatus Menzies
family: Scrophulariaceae
subfamily: Antirrhinoideae
tribe: Cheloneae
epithet cited:
diffusus,-a,-um
epithet recognized:
Illustration contributed by:
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link to this page:
https://www.plantillustrations.org/illustration.php?id_illustration=410197
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synonyms:
