Silver-grain, the medullary rays of wood, [139].
Silvery, shining white or bluish-gray, usually from a silky pubescence.
Simple, of one piece; opposed to compound.
Sinistrorse, turned to the left.
Sinuate, with margin alternately bowed inwards and outwards, [55].
Sinus, a recess or bay; the re-entering angle between two lobes or projections.
Sleep of Plants (so called), [151].
Smooth, properly speaking not rough, but often used for glabrous, i. e. not pubescent.
Soboliferous, bearing shoots (Soboles) from near the ground.
Solitary, single; not associated with others.