Anatomy and supply. The thenar musculature consists of four muscles located on the radial side of the palm. Together they form the 'ball' of the thumb known as the thenar eminence. They originate at different carpal bones and distally attach to the thumb. The thenar muscles are: Abductor pollicis brevis muscle: arises from the tubercles of the scaphoid and trapezium, and from the flexor retinaculum.
Steps. 1  1. Choose the proper time to prune lemon trees. 2  2. Remove all fruit from the tree. 3  3. Prune any branches that are damaged or diseased all the way back to the base.  4. Cut any branches that are smaller than the diameter of a 1  pencil. 5. Prune suckers as they appear at any time.  6. Decide if you want an open, compact, or hedge type tree look.
Now is also a good time to plant 5-gallon citrus. Water deeply once this month. April Remove any citrus you did not eat, since they fall from the tree. If you still have grapefruit on the tree, you might decide not to pick them up, they keep on getting sweeter until the summer. It is still a good time to plant citrus. Check that all the trunk parts of citrus and young trees that are exposed to the sun are painted white. This keeps them cooler and protects them from sunburn. Use white latex paint diluted with water (1 volume white flat latex paint for 1 volume water).