Note 59 — VII.
Reading edition
"Each and every plant is at first a cell."—"New cells can never be formed externally to, but only within, other cells already formed." (A. Braun, on the Veg. Indiv.)
"The process of the propagation of cells, by the formation of new cells in their interior, is an universal law in the vegetable kingdom." (Schleiden; Grundzüge).
"Cell-formation in plants takes place only in the cavities of older cells." (Mohl, on the Veg. Cell)