In gazing at a LLoyd CII photo(1 only) which has 'linen covered' flatface plywood on the fuselage but normal ribbing viewable from under the top left wing.
Clearly fabric. A later rendition of a side view of the similar Lloyd
CIV shows again the plywood fuselage and
fabric wings but is not a photo but a detailed color rendering. The CV was a true departure,"with airfoil shaped ribs" surrounded by spanwise longerons covered in plywood sheeting-strong light and IMPOSSIBLE to fix in the field as moisture collected in the wing and warped the plywood. A full color rendition of the V strutted CV shows
no ribbing to the wings, with
scalloped upper ailerons and tailfin, as with the photo of the 1915 CII. I can't wait to see a Lloyd FJ 40.05 or the surreal 40.08 3 engine LuftkreuzerII!
Fabric...as you surmised.