Okay, so I made up the name. What is the real reason this occurs on palms? I have heard everything from too much shade, too much wind, and all different kinds of nutrient deficiencies. I have two palms that otherwise look healthy with collapsing petioles. One is a Dypsis cross. I believe it to be a D. madagascarensis/lutescens hybrid. I have three of these palms, and two are healthy with no bent petioles on any of the trunks. The second affected palm is a D. lanceolata. Again i have others that are fine. The first pic is of a healthy D. madagascarensis/lutescens to show the overall habit and lack of collapsed petioles. And the subsequent pics are close ups of the affected palms. They both receive similar exposure to sun and wind, and receive the same fertilizing regimen.