Polymer Chemistry. Morphology. Polymer morphology is the overall form of polymer structure, including crystallinity, branching, molecular weight, cross-linking, and so on14. Small molecules usually have crystalline solids, which are highly-ordered 3-dimensional arrays of the molecules.
Further information: List of flora of the Mojave Desert and Flora of the Sierra Nevada alpine zone. Native wildflower blazing star (Mentzelia lindleyi) Gentiana algida in Sierra Nevada. California native plants are plants that existed in California prior to the arrival of European explorers and colonists in the late 18th century.
In the United States, the Great Plains, portions of the southern California coast and the Great Basin are semi-arid deserts. The biome is called steppe, which has short bunch grass, and scattered low bushes, or sagebrush (Figure 17.13). A steppe has few or no trees because there is not enough rain for trees to grow.