sporophylls also have a very short mucro and the marginal cilia are dense and numerous. In contrast S. Watsoni has, on the average, shorter leaves, these more abruptly narrowed or obtuse, thicker, more strongly dorsally convex, and terminating in a distinct lutescent bristle 0.2-0.35 (4) mm. long. The marginal cilia are frequently entirely lacking but when present vary in different plants, the usual range being 3-10 on each side although in a few leaves there may be more. The cilia of the sporophylls generally correspond in number quite closely to those of the leaves of the same plant, but are never as dense as those in S. utahensis.