SPERMATOPHYTA n.
rked development of the sporophyte, with great differentiation of its parts (root, stem, leaves, flowers, etc.); by the extreme reduction of the gametophyte; and by the development of seeds. All the Spermatophyta are heterosporous; fertilization of the egg cell is either through a pollen tube emitted by the microspore…
SPIKE n.
f two tall perennial American grasses (Uniola paniculata, and U. latifolia) having broad leaves and large flattened spikelets. -- Spike rush. (Bot.) See under Rush. -- Spike shell (Zoöl.), any pteropod of the genus Styliola having a slender conical shell. -- Spike team, three horses, or a horse and a yoke of oxen, h…