This was named after a German botanist, August Weberbauer, who lived between 1871-1948. He studied cacti from Peruvian Andes and those from this genus come from there. They grow to 6' in height, 6" wide and branch, but the temperature should not drop below 5° centigrade (41° fahrenheit)
Sadly I am unaware of its species name.
Adromischus ~ Astrophytum ~ Cephalocereus ~ Cereus ~ Cyanotis ~ Echinopsis ~ Epiphyllum ~ Espostoa ~ Ferocactus ~ Frithia ~ Gymnocalycium ~ Haworthia ~ Hildewintera ~ Lithops ~ Lophocereus ~ Mammillaria ~ Notocactus ~ Opuntia ~ Pilosocereus ~ Rebutia ~ Schlumbergera ~ Sedum ~ Sempervivum ~ Stenocereus ~ Sulcorebutia ~ Tephrocactus ~ Turbinicarpus