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Stenocereus gummosus in flower

More Stenocereus

(Photo = Stenocereus gummosus in flower, Christian Defferrard) Introduction Stenocereus contains mostly columnar cacti, but several break that rule and one actually grows along the ground like a vine (S. eruca). One species of Stenocereus...

Opuntia mojavensis

Opuntia mojavensis

(Front Photograph = Opuntia mojavensis in winter.) Introduction Opuntia mojavensis is an enigma. The only historical drawing shows 2 spine clusters and an immature fruit. The herbarium sheet (lectotype) also has limited material. The Details...

Stenocereus gummosus, Amante Darmanin

Stenocereus queretaroensis Seed Germination

(Photograph: Stenocereus gummosus, el Vizcaino, Baja California del Sur, Amante Darmanin) Introduction Seeds of wild plants need special conditions to germinate: “…seeds may readily germinate following an early summer rain, but fail to respond to winter...

Agave parryi, Doug Felt

Agave parryi

(Photograph: Agave parryi, Doug Felt) Introduction Agave parryi is a handsome agave that is found in Texas, New Mexico, southern Arizona, and south into Mexico. It has been known as A. chihuahuana and A....

Ferocactus gracilis gatesii, Christian Defferrard

Flora of Baja California

(Photograph: Ferocactus gracilis gatesii, Christian Defferrard) Introduction Baja California (del norte) is the upper state on the Baja peninsula of Mexico. The southern state is Baja California del Sur. Both states have beautiful desert scenery...

Mammillaria albata, Amante Darmanin

Mammillaria geminispina/albata

(Photograph: Mammillaria albata, Amante Darmanin) Introduction Hundreds of species have been described for the genus, Mammillaria. Today, about 170 are accepted by botanists (Anderson, 2001). The genus is very popular, in part because many...

Sclerocactus johnsonii, Nancy Hussey

Sclerocactus johnsonii

(Photograph: Sclerocactus johnsonii, Nancy Hussey) Introduction Sclerocactus johnsonii has been a MEMBER of various genera: Echinocactus, Echinomastus, Ferocactus, Neolloyeia, Thelocactus, and even Pediocactus. It seems to be in the right genus now. Local populations dot...

Trichocereus pascana, Lleonora Enking

It’s Echinopsis Now, not Trichocereus

(Photograph: Trichocereus pascana, Lleonora Enking) Introduction As a genus, Trichocereus has a long and honorable history. The name was established in 1909. Later discussions (e.g., Britton and Rose, vol 2) refuted the idea of combining...