Draw one straight, long line to start the outline of your columnar cactus's main stem. Add two lines protruding from the side of your stem to create the "arms" of the cactus. Slope the arms upward but do not let them extend higher than your main stem. Create detailing lines around the outline to give your cactus its shape.
Outline your palm tree by making a line to represent the length and shape of the trunk and lines at the top that show the placement of the palm leaves. Draw the palm tree leaves, angling them to match the lines of your original outline. Draw rectangles stacked length-wise along the trunk in order to capture the shape of the palm tree bark.
Create a long line coming up from the ground (your stem) with a doughnut (the radius of the daisy bloom) on the top to start your outline for a wooly daisy. Add lines extending from the stem in order to represent any leaves you want coming from the stem. Thicken your stem and add the leaves to it.
Add petals to your wooly daisy picture by starting the petal outside the small circle of the doughnut and extending the petals to the larger ring of the doughnut shape. Draw several small circles inside the small circle of the doughnut to help represent the pollen. Add small hairs on the stem and leaves of the daisy as well; these are what makes it wooly.
Trace over all the new detail you have added to your plants with a pen. Do not trace over the shapes of the original outlines. Erase all remaining pencil marks once the ink has dried.