Infrastructure means the basic structure of an organization or system. A company's infrastructure would include all the fixed assets, i.e., the building, equipment, machinery and tools required to manufacture their product. Although people are not fixed assets they would be included in the company's infrastructure too.
Rarely a serious problem. Look-alikes: Jumping oak gall, tubakia leaf spot, oak leaf blister, other fungal leaf spots. Jumping oak gall Brown leaves appear on trees in the white oak group in late spring. Severe infections may cause the leaves to turn black, curl up and fall. On the underside are brown galls with the larva of a small wasp inside.
Angiosperms, the second group of trees, have covered seeds and are often called deciduous trees. They drop their leaves each autumn. These aspens, oaks, maples, hickories, ashes, birches, and other trees make our fall forests colorful. Conifers' narrow, tough needles retain moisture and allow the tree to survive in winter when the air is cold and dry. The broad leaves of deciduous trees evaporate a lot of water and use a lot of sap.