1892.) Archegonium and Apical Growth in Tsuga and Pinus. 141 
place in the study of botany of this country can not be 
filled, for the conditions which made him have disappeared; 
but to many of us this loss will appear secondary, because we 
especially cherish the memory of the kind and helpful friend. 
Indiana University, Bloomington. 
On the archegonium and apical growth of the stem in 
Tsuga Canadensis and Pinus sylvestris. 
D. M. MOTTIER. 
(WITH PLATE VIII.) 
time to come. Now and then modern research fills up a gap 
or throws some light on the true, line of development. 
he gymnosperms, holding as they do a position between 
the pteri 
ches the development of the embryo and the meris- 
; i of stem and root that we are to look for the true affin- 
'es of the neighboring groups. 
Sarat ng representative types of the gymnosperms have been 
an ek studied by Hofmeister and, later, by Strasburger 
USE so ers. Since more accurate methods have come into 
peice. « the work done by these botanists has been re- 
or TY in cases concerning which there was doubt 
Hac: ence of opinion. 
ful aa had material in abundance, I recently made a care- 
Udy of the development of the archegonium in Tsuga 
sis and Pinus sylvestris and found that in a few de- 
results do not quite agree with the account of Stras- 
Meister’s ep is investigator states that he can not affirm Hof- 
Canadensis ement that the neck of the archegonium of Tsuga 
but that it Consists of two cells, one lying above the other, 
find two remains one-celled, and only in rare cases did he 
-_Ina large number of specimens examined I found 
‘Die Befru 
chtung bei den Coniferen, p. 6. Jena, 1869. 
