Gerrardanthus macrorhizus, caudiciform, 3.5" pot Gerrardanthus macrorhizus is an excellent caudiciform. The swollen base can grow in excess of 12" in diameter. It produces a lush green vine with glossy leaves. This plant is ready to "blow-up". Plant in 6" pot and stand back! Caudex size of this plant is 2.5" in diameter.