Showers and Thunderstorms Across the East; Rain and Mountain Snow out West. A frontal boundary draped from the Mid-Atlantic to Texas will continue to focus showers with the potential for locally heavy precipitation. A new active storm pattern will bring rain with mountain snow to the west. Pacific storms moving into the Central U.S. this week will bring showers and thunderstorms to the northern states. Read More >. Customize Your Weather.gov.
The prothallium produces both male and female sexual organs. When the female organs become fertilized by the male organs, small fern plants begin to grow. In some ferns it can take as long as six months for the first fronds (leaves) to appear after sexual fertilization.
The life cycle of the fern Ceratopteris richardii. From sporophyte to spore germination. When we think of ferns, we probably imagine something similar to the Boston ferns that we see for sale in local grocery stores and nurseries. In all ferns, this conspicuous phase of the plant s life cycle is the sporophyte.A fern sporophyte consists of the fronds, a stem in the form of a rhizome, and adventitious roots that arise along the rhizome. What we consider the leaf of the fern is actually a megaphyll, commonly referred to as a frond.he life cycle of the fern Ceratopteris richardii. From gametophyte to sporophyte development. The prothallus is the green-heart shaped gametophyte. On the underside of the prothallus, in the central area of the lower side, are the rhizoids.