Note to players: Common or scientific name acceptable. These plants are classified by a system named for Ren-Chang Ching. An aquatic genus of these plants that is used as a biofertilizer for rice for its ability to fix nitrogen is named Azolla. (-5[1])The gametophyte (-5[1])stage of these plants (-5[1])is a heart-shaped structure called the prothallus. (15[1])These plants undergo circinate (15[1])vernation, in which their crozier-shaped (*) fiddleheads expand. (10[1])These plants evolved to grow in low-light conditions during their namesake (10[1])“great radiation” in the late Cretaceous period. This group of plants includes the Marattiales (10[1])and the Equisetales, which are called horsetails. These plants display brown dots (10[1])called sori (“sore-ee”) on their undersides. For 10 points, name these seedless vascular plants that reproduce by releasing spores from their fronds. (10[1])■END■ (10[2])