PART IV.
THE FIVE GREAT CLASSES OF PLANTS
XXIII. Flowering Plants 125 XXIV. The Pine-Tree Family 127 XXV. Ferns and their Relatives 133 XXVI. Mosses and their Relatives 138 XXVII. Algæ and Fungi 141
THE FIVE GREAT CLASSES OF PLANTS
XXIII. Flowering Plants 125 XXIV. The Pine-Tree Family 127 XXV. Ferns and their Relatives 133 XXVI. Mosses and their Relatives 138 XXVII. Algæ and Fungi 141