Echinocereus rigidissimus (Engelm.) F.Haage
Curtis, W., et al., Curtis’s Botanical Magazine, ser. 2 (1984-2021)
Bot. Mag., ser. 2

vol. 1 (1984)
t. 24 f. 2
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name recognized (= cited name):
370196 Echinocereus rigidissimus (Engelm.) F.Haage
recognized name (basionym):
226308 Cereus pectinatus var. rigidissimus Engelm.
drawing: C. King
family: Cactaceae
subfamily: Cactoideae
tribe: Pachycereeae
epithet cited: rigidissimus,-a,-um

epithet recognized:

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http://www.plantillustrations.org/illustration.php?id_illustration=444739
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synonyms:
homotypic synonyms:
Cereus pectinatus var. rigidissimus Engelm.;
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2 370196 Echinocereus rigidissimus (Engelm.) F.Haage [80 226308 Cereus pectinatus var. rigidissimus Engelm.]
W. Curtis, Bot. Mag., ser. 2, vol. 1 : t. 24, fig. 2 (1984) [C. King]