Studies on the Araceae. 
BY 
DOUGLAS HOUGHTON CAMPBELL, 
Professor of Botany in the Stanford University , California, U.S.A. 
With Plates I-III. 
W HILE the Araceae have received sufficient attention 
from the systematists, they have not had their due 
from the students of histology, and especially of embryology. 
This seems rather surprising, considering what a peculiar and 
interesting Order that of the Araceae is ; but, on the other 
hand, as only a small number of them are plants of the 
temperate zones, it is probable that the difficulty of procuring 
suitable material has had much to do with this. 
It is true that Hofmeister, in his remarkable series of 
embryological studies, discusses and figures a considerable 
number of Araceae, and shows a number of peculiarities to 
be present, which seem to have been quite disregarded by 
later observers. Unfortunately, Hofmeister’s accounts are 
very fragmentary and, although extremely suggestive, have 
not been followed by any others except the description of 
the embryo of Pistia by Hegelmaier 1 . More recently 
Mottier 2 has published an account of the early development 
of the ovule and embryo-sac of Arisaema triphyllum , but aside 
1 Hegelmaier, Zur Entwickelungsgeschichte monocotyledoner Keime, Bot. Zeit., 
1874. 
2 Mottier, Bot. Gazette, 1892. 
[Annals of Botany, Vol. XIV. No. LIII. March, 1900.] 
B 
