Related organisms to this division possess non-photosynthetic leaves containing a characteristic vascular trace. Some species in this division benefit from an umbrella-like covering provided by a thin film of tissue called the indusium. Their gametophyte stage is called a prothallus, and as of 2006, this group includes the plants known as horsetails. Their namesake "great radiation" occurred in the Cretaceous, though they first appeared in the fo
Related organisms to this division possess non-photosynthetic leaves containing a characteristic vascular trace. Some species in this division benefit from an umbrella-like covering provided by a thin film of tissue called the indusium. Their gametophyte stage is called a prothallus, and as of 2006, this group includes the plants known as horsetails. Their namesake "great radiation" occurred in the Cretaceous, though they first appeared in the fossil record around the Carboniferous period. They are more complex than the (*) lycophytes because they possess true leaves, known as fronds. For 10 points, name this division of seedless vascular plants, also called Pteridophyta.
Related organisms to this division possess non-photosynthetic leaves containing a characteristic vascular trace.
{ferns} [accept {pteridophytes} prior to mention]