Species, [175].
Specific Names, [179].
Specimens, [184].
Spermaphore, or Spermophore, one of the names of the placenta.
Spermum, Latin form of Greek word for seed; much used in composition.
Spica, Latin for spike; hence Spicate, in a spike, Spiciform, in shape resembling a spike.
Spike, an inflorescence like a raceme, only the flowers are sessile, [74].
Spikelet, a small or a secondary spike; the inflorescence of Grasses.
Spindle-shaped, tapering to each end, like a radish, [36].