Scutellate, shaped like a platter, [156].
Scyphus, cup-like dilatation of the podetium, [111], [117].
Signature, a term in ancient medicine to signify the resemblance of a plant to any part of the human body, [406], [409].
Soralium, group of soredia surrounded by a definite margin, [144].
Soredium, minute separable particle arising from the gonidial tissue of the thallus, and consisting of algae and hyphae, [141].
Spermatium, spore-like body borne in the spermogonium, regarded as a non-motile male cell or as a pycnidiospore, [201].
Spermogonium, roundish closed receptacle containing spermatia, [192].
Sphaeroid-cell, swollen hyphal cell, containing fat globules, [215].
Squamule, a small thalline lobe or scale, [74] et passim.
Sterigma, Nylander’s term for the spermatiophore, [197].