Shortia, characters of the genus, xlii, 48.
Silene axillaris, vii, 62.
— regia, xi, 182.
Silphium, v, 301.
Sium tricuspidatum, xi, 175.
Smilax grandifolia, xlv, 171.
Solorina saccata, xlv, 49.
Sophora affinis, xlix, 130.
Squamaria rubina, notice of, xxxix, 183.