File contains only one rigged Flower, and one rigged leaf. Do not forget to link/append armatures and emptys as well. (you will need every object except Camera and Lamp) After import select armatures and press (Ctrl Numpad +) "select more" to select parented objects, and then (Shift D) to duplicate/populate flowers and leafs. Then use pose mode to put them in a bouquet. Flower root bone is the upper one, leaf root bone is the lower so arranging should be easy. Just remember that you can rotate and scale the bones to fit the shape of the flower. texture.coord.empty is needed for texture coordinates for displace modifier on petals, which gives the flower variability. Import it also.
The size of the Jonquil is Plausible in metric units, but a haven't really measure one. 1 meter is 1 blender unit. (Only barbarians uses imperial units - sorry USA and Liberia)
Happy blending and Have a nice bouquet!