Cryolens

The cryolens has split from its ancestor, the cryostalk. As the cryostalk grew larger, they began to compete with larger flora for space, most notably the black-stalk flora. This problem was solved when by mutation; the top of a cryostalk did not contain any photosynthetic cells, consisting entirely of the glass-like lenses used to focus light. This proved to be very useful, as light focused through the lens could be used to burn surrounding plants. As it grows, the photosynthetic cells detect where a shadow is coming from, and it grows the lens to be aimed at the plant. Killing a plant can vary, plants around its size are burnt within a few weeks, but plants many times larger than them usually will not be killed, as the light is only focused for a few hours a day. Other glass flora usually don't get burnt, because they cast a fainter shadow. Like their ancestors they are very efficient in getting nutrients from the ice and soil. They need very little nutrients to grow and can live on ice.