Roots tend (but don't always) grow sortof downwards while flower stalks will tend to reach toward the light. The flower stalks generally have a slicker texture than the roots and have a pointyer (is that a word) tip.
1 A good rule of thumb is that at 350 degrees the salmon will bake about ten minutes per one inch thickness of your fillet. A two-inch thick fillet will bake for 20 minutes. A 1-1/2 filet will take 15 minutes and so on.  Check the salmon frequently.
Bake the salmon in the oven for 25 to 30 minutes, depending on the thickness of the salmon fillet. To determine when the salmon is cooked, insert a sharp kitchen knife into the thickest part of the fillet and pull it to one side.