While Crassula barklyi is also known as "Rattlesnake Tail" and "Bandaged Finger" (no joke!), these little compact towers are definitely not dangerous and are very healthy.
This plant originates from Lesotho, Namibia, South Africa, and Swaziland. At a maximum of 4" tall, their compact leaves are overlapping and close. When they bloom in the winter, they sprout numerous tiny white flowers at their heads, making them look like a snowy palm tree—a lovely tropical feel during colder winter months. Too bad 'Snowy Palm Tree' didn't catch on!