Defining the cotangent function. The cotangent function is an old mathematical function. It was mentioned in 1620 by E. Gunter who invented the notation of cotangens. Later on J. Keill (1726) and L. Euler (1748) used this function and its notation in their investigations.
A U.S. Department of Agriculture research scientist bred these beauties, and now they are grown by J. Berry Nursery in Texas. Five in series. The stunning black diamond crape myrtle has five different colors. We all know how different reds can be, and there is the Best Red, which is a very dark red. You might think it wouldn't show up with the dark burgundy leaves, but it is a beautiful mix of colors.
Prune crepe myrtle trees when you wish to shape them or if you find the branches are too close together for your taste, but for the most part, you do not need to prune crepe myrtle trees. There are two schools of thought when it comes to pruning crepe myrtle trees. One is a natural style and the other is a formal style. Natural style. A natural style of pruning will mostly address the limbs within the tree that may be keeping your crepe myrtle tree from putting on the best show it can.