Stirps (plural, stirpes), Latin for race.
Stock, used for race or source. Also for any root-like base from which the herb grows up.
Stole, or Stolon, a trailing or reclined and rooting shoot, [40].
Stoloniferous, producing stolons.
Stomate (Latin Stoma, plural Stomata), the breathing-pores of leaves, [144].
Stone-fruit, [119].
Storage-leaves, [62].
Stramineous, straw-like, or straw-colored.
Strap-shaped, long, flat, and narrow.
Striate, or Striated, marked with slender longitudinal grooves or stripes.