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A microsporangium (pl. microsporangia) is a sporangium that produces microspores that give rise to male gametophytes when they germinate. Microsporangia occur in all vascular plants that have heterosporic life cycles, such as seed plants , spike mosses and the aquatic fern genus Azolla .
Southern California Coastal–Baja California; Sacramento–San Joaquin; Marine ecoregions. Northern California [3] Southern California Bight; References
The coast of California north of San Francisco contains the Northern California coastal forests (as defined by the WWF) and the southern section of the Coast Range ecoregion (as defined by the EPA). This ecoregion is dominated by redwood forest , containing the tallest and some of the oldest trees in the world.
The California chaparral and woodlands is a terrestrial ecoregion of southwestern Oregon, northern, central, and southern California (United States) ...
The microspore has three different types of wall layers. The outer layer is called the perispore, the next is the exospore, and the inner layer is the endospore.The perispore is the thickest of the three layers while the exospore and endospore are relatively equal in width.
The sporophyll of a fern. It is a fertile leaf bearing reproductive structures. In botany, a sporophyll is a leaf that bears sporangia.Both microphylls and megaphylls can be sporophylls.
This is a list of regions of California, organized by location. Northern California. Central California. Central California. Central Valley; Central Coast (North) ...
Numerous plant communities exist in California and botanists have attempted to structure them into identifiable vegetation types groupings. Robert Ornduff and colleagues Phyllis M. Faber and Todd Keeler-Wolf did much work on this problem, and in the 2003 Natural History Guide Introduction to California Plant Life [citation needed] established a cohesive set of titles to identify California ...