“ 
8 The Botanical Gazette. aon 
A comparative study of the roots of Ranunculacez. 
: FRED B. MAXWELL. 
WITH PLATES II-Iv. 
I. Historical Introduction. 
After the beginning of the present century, when a : 
anatomy began seriously to attract the attention of yee : 
the cell wall was the first subject of investigation; then t a 
actively growing parts above ground; and finally the roots 7 
plants were studied. Nevertheless the latter have ne 
far less attention Proportionally than the other organs 0 4 
plants. 
formed parts, th 
formation of the mature parts. 
n 1810 Mirbel,? the earliest of the 
the first period, studied the roots 
1831 Hugo von Mohl,? from the st 
important writers 
of Nymphaea lutea, and 
udy of the roots of a palm 
*For the résumé of the works of the earlier writers I am indebted to t 
mirable articles by Flahault, Janczewski and Olivier. sil 
*Examen de la division des vegetaux en endorhizes et exorhizes. Compt 
1810. Ann. du Museum, xvr, : 
