n. - A fossil plant of the coal formation, having the general
form of plants of the modern Equiseta (the Horsetail or Scouring Rush
family) but sometimes attaining the height of trees, and having the
stem more or less woody within. See Acrogen, and Asterophyllite.
n. - A fossil plant of the coal formation, having the general
form of plants of the modern Equiseta (the Horsetail or Scouring Rush
family) but sometimes attaining the height of trees, and having the
stem more or less woody within. See Acrogen, and Asterophyllite.