King hit the nail on the head.
I'll also add that these plants are very disease-prone. You have to be careful not to water too late in the day because any water sitting in the leaf axils will cause bacterial or fungal rot to establish. They're also really hard to bring back to health if they succumb; once they're sick, they tend to get sulky.
I've found lehmannii to be one the slightly more difficult species in this genus. If you wanna start out with this genus, try P. cerina or P. dayana. Even though they're not as showy as lehmannii, they're more tolerant of poor conditions.
By the way, the genus name is spelled "Pescatorea," not "Pescatoria."
