Tetradynamous, where a flower has six stamens, two shorter than the four, [101].
Tetragonal, four-angled. Tetragynous, with four pistils or styles. Tetramerous, with its parts or sets in fours. Tetrandrous, with four stamens, [100].
Tetraspore, a quadruple spore, [169].
Thalamaflorous, with petals and stamens inserted on the torus or Thalamus.
Thallophyta, Thallophytes, [165].
Thallus, a stratum, in place of stem and leaves, [165].
Theca, a case; the cells or lobes of the anther.
Thecaphore, the stipe of a carpel, [113].
Thorn, an indurated pointed branch, [41], [42].
Thread-shaped, slender and round or roundish, like a thread.