Trichocereus bertramianusThis tall, bristly-spined cactus is part of the Trichocereus tarijensis gro
Trichocereus bertramianusThis tall, bristly-spined cactus is part of the Trichocereus tarijensis group, native to southwestern Bolivia and across the border in northwestern Argentina. While T. tarijensis itself has a magenta-pink flower, T. bertramianus has pure white flowers. Some classifiers treat bertramianus as a subspecies of T. tarijensis, and still others treat it as a synonym under that species. For a time, all of the Trichocereus species were lumped into Echinopsis, but this drastic lumping effort has been walked back. Under any name, T. bertramianus is a striking plant.-Brian -- source link
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