Columnar Cacti

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Cereus

Cereus: (Mill.) A group of mostly large quick growing columnar cacti widespread in South America and also the West Indies. White or slightly reddish flowers, large and nocturnal. Cereus species are distingished by style remaining attached to the fruit for some time after the perianth has become detached. Fruit oblong, fairly large, hairless. The name Cereus is from the Greek and Latin signifying a torch.

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Cereus aethiops
Cereus aethiops: (Haw.) Argentina Mendoza to Rio Negro. Thin, somewhat tuberculate bluish stems.		 Cereus alacriportanus
Cereus alacriportanus: (Pfeiff.) S. Brazil, Uruguay, Paraguay. Bluish stems with new areoles and spines tan in color.		 Cereus chalybaeus
Cereus chalybaeus: bought as; N. Argentina near Cordoba. Accord to Backeberg there seems to be two Cereus sp. from this area, one stout stemed and one with thinner stems, both probably have been called C. chalybaeus.		 Cereus forbesii
Cereus forbesii: (O.) Argentina Catamarca, Tucuman, Jujuy, Cordoba. Bluish stems with more than one form. Some have black spines, there is a form with tan spines
Cereus hankeanus
Cereus hankeanus: (Web.) E. Bolivia		 Cereus 'peruvianus' monstrose form
Cereus "peruvianus" monstrose form		 Cereus 'peruvianus' var./form tortuosus
Cereus "peruvianus" var./form tortuosus, spiralled ribs.		 Cereus sp. knobby monstrose form
Cereus sp. knobby monstrose form
Cereus validus
Cereus validus: (Haw.) E. Bolivia to Argentina. Bluish stems with tan spines, a similar plant to C.forbesii.		 Cereus aethiops bud
Cereus aethiops bud		 Cereus aethiops flower
Cereus aethiops flower 23 cm long, 16 cm wide outer perianths, inner perianths cup 9 cm wide.
Cereus chalybaeus bud
Cereus chalybaeus bud		 Cereus chalybaeus flower
Cereus chalybaeus flower
Collection AWM		 Cereus chalybaeus flower
Cereus chalybaeus flower front view 20 cm long, 13 cm wide outer perianths, inner perianths cup 11 cm wide.
Cereus chalybaeus flowers
Cereus chalybaeus flower side view
Cereus species partly red flower
Cereus validus or forbesii form of:- partly red flower
Copyright Bob Ressler, no reproduction without permission of the author.

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