Preheat the oven to 350°F. Line 12 muffin cups cupcake liners, or lightly grease with oil, or spray generously with cooking spray.
If using flax instead of egg, mix the flax meal with warm water. Set aside to let gel while you prepare the rest of the ingredients.
Sift the spelt flour, baking soda, baking powder, and salt together in a larger bowl. Stir in the hemp seeds and the 1/2 cup of chopped pecans.
Mix the flax meal slurry with the orange zest, orange juice, oil and maple syrup.
Add the liquid mixture to the bowl of dry ingredients. Mix with a rubber spatula, using as few strokes as possible so as not to overmix the batter. You want clumps of dry ingredients to remain unmixed, so resist the urge to mix thoroughly. When there still clumps of flour unmixed, fold in 1 cup of blueberries. (see note)
Immediately divide the batter into the prepared muffin cups. Place a reserved blueberry on top of each muffin and sprinkle the remaining pecans. (Alternatively sprinkle with hemp seeds.
Bake 20 -25 minutes, until a toothpick inserted into a muffin comes out clean and the tops of the muffins spring back when touched with a finger. Cool 5 to 10 minutes, and then remove from the pan.