103 
also in the form of the organs. The leaves lose some of the 
dentations and incisions of the margins, and show a tendency to 
revert to ancestral, or to primordial forms ; the cotyledons persist 
longer, and the branching of the inflorescence is simplified. The 
least reduction occurs in the flowers and seeds, and the greatest 
in the roots. mong the more common examples of dwarfs 
may be mentioned: Leptilon Canadensis, Hypericum, Gentiana 
quinguefolia, Helianthus and Plantago aristata. The woody tis- 
SE 
=< 
SS 
A) 
— Ss + 
Zr 
i 
Bt 
Fic. 23. Normal and dwarf leaves of Pluchea camphorata. 
sues of the stem are not so well developed, while the pith is 
heavier than in the normal specimens. 
In conclusion it is important to note that minute specimens, 
no matter whether they are mutilated dwarfs or true dwarfs, do 
ot transmit their qualities by seeds. The daughter plants may 
be slightly below the average in some instances, but this dis- 
appears in the next generation, and hence there are no dwarf 
races or varieties perpetuated by seeds. 
