pineland clustervine, Jacquemontia curtisii

Not all flowers in the morning-glory family look like morning-glories. In fact, I'm not even sure what this one looks like. One authority says this Jacquemontia has rounded ends on the sepals. This one has points, like Havana clustervine, J. havanensis. Another says the leaves of Havana are no more than a half inch. This one has much larger leaves. Pictures on the net are no less confused. Either way, they just grow in south Florida, where J. curtisii is threatened, and J. havanensis is endangered. The flowers are almost an inch across. Everglades National Park, 1/26/13.