Lasia spinosa (Arrow head leaf form) this clone of Lasia has large solid arrowhead hastate leaves. These leaves can grow 1 to 2 feet long and wide. The petioles (stems) are covered with spines and best to grow in water as an aquatic or in a tray of water. Plants can grow 4 to 7 feet tall with a twisted black flower. Plants sold in 1 foot tall cuttings.