The Pyrenom is a direct split of a population of Dandy Nomweeds blown into the dynamic Beans Volcanis as spores. While this initial population at first flourished due to the abundance of soil nutrients, frequent lava flows swept through the groves of cyan and leaving barren rock behind. This isn't to say the population didn't leave a legacy - survivors germinated from more resistant spores, and their descendants built upon their traits, eventually becoming a distinct species.

As a fast-growing early succession flora, a Pyrenom can propagate weeks after an initial community reset. Its short, dense foliage grows close to the fertile igneous soil, making the most of its area of photosynthesis. A single root shoots into the soil and branches outward, making most of this bevy of nutrients; most branch rhizomes house cultures of Nitropellets, further enhancing nutrient intake and breaking into new rock. Like the related Nomreed, much of the heart lies underground and serves to pump nutrients and water throughout the Pyrenom’s tissues.

An elongate sporophore is hoisted high into the air in breeding season, sending out gametes to the wind. Conjugated gametes will form a spore in a tough, seed-like coat, able to withstand a variety of conditions. With a lava flow having cleared away a mature grove of Pyrenoms, the spores can eventually settle in and last quite a while until a soil culture is formed from the activities of Nitropellets and MWMLEtMaB, beginning the succession anew. When there is enough space, clone Pyrenoms can also be produced from runners. A single Pyrenom can reach adult size by around a month.

Due to their little dependence on silica, Pyrenoms can grow much faster and in more numbers than nearby glassflora of similar size.