Pteridophytes (ferns and lycophytes) are a widespread group of plants of around 13,000 species found in almost every habitat in the world. We selected 1,500 species of pteridophytes at random from a ...

PHYSIOLOGICAL and experimental observations have hitherto played virtually no part in helping to elucidate problems connected with the organization of the plant body in Pteridophytes. The approach ...

First ed. published in 1938 under title: Vergleichende Anatomie der Vegetationsorgane der Pteridophyten.