PLANT PROPAGATION 
CHAPTER I 
SEED AND SEEDLINGS 
AROUND us, both at home and abroad, we observe that 
plants are propagated naturally by different means, but 
the majority are reproduced either by seeds or by spores. 
Of the latter we shall deal more fully when treating on 
YounG FERN GROWING FROM PROTHALLUS, (Slightly Enlarged.) 
~, Lower surface of prothallus; 7, root-hairs of prothallus ; 
jr, young frond of Fern; 7, root of Fern. 
Ferns. Again, we observe in Nature that very wonder- 
ful and extraordinary means are employed to bring 
about cross-fertilisation and to prevent inbreeding, the 
progeny thus continuing to be reproduced without any 
weakening of their primary vigour. 
