Escobaria alversonii

Here is the smaller specimen of this nice Escobaria in Joshua Tree National Park. Joshua Tree Park is a good place to see this species - it is fairly common if you are in the right area.. The flowering time is late May or June.

Opuntia basilaris

Large plant growing in Joshua Tree national park. Large plants produce tens of blooms, but flowering is spread over longer period, with only a few flowers open at time. As with most Opuntias, flowers open for two days, closing for the nights.

Ferocactus cylindraceus

Ferocacti in Anza-Borrego are very variable in size, spines color and length. That usually points to some recent hybridization that happened to this population.

Mammillaria tetrancistra

Anza-Borrego California State park

Sclerocactus blainei

It was a cold day at the end of April, with temperatures just above freezing and snow that fell overnight on the hills above. The  flowers on that young plant only starting to show mature spination stayed closed.

Echinomastus johnsonii

Several years old seedling near Death Valley shows new growth.

Echinocereus sheerii

The form of E.sheerii with very large flower. Very similar flowers has plant known in cultivation as E. polyacanthus 'densus'. Possibly my plants are a smaller form of it.