thallogens

They compose, with the algæ and lichens, the class of thallogens (Lindley), the algæ existing in water, the other two in air only.

Forty Centuries of Ink 1904

The order in which fossils of these several classes appear in the strata, Hugh Miller states to be as follows: — In the Lower Silurian we find only thallogens, in the Upper Silurian acrogens are added.

Essays and Reviews: The Education of the World, Bunsen's Biblical Researches, On the Study of the Evidences of Christianity; Seances Historiques de Gen��ve; On the Mosaic Cosmogony; Tendencies of Religious Thought in England, 1688-1750; On the Interpretation of Scripture. 1821-1902 1860

This last result led me to Lindley's "Vegetable Kingdom," in which I found (excluding thallogens and acrogens) that the genera include each

More Letters of Charles Darwin — Volume 1 Charles Darwin 1845

According to the arrangement of Lindley, he observes — ‘Commencing at the bottom of the scale we find the thallogens, or flowerless plants, which lack proper stems and leaves — a class which includes all the algæ.

Essays and Reviews: The Education of the World, Bunsen's Biblical Researches, On the Study of the Evidences of Christianity; Seances Historiques de Gen��ve; On the Mosaic Cosmogony; Tendencies of Religious Thought in England, 1688-1750; On the Interpretation of Scripture. 1821-1902 1860