262 BOTANICAL GAZETTE focroue 
ence to points of general morphology as well as those that concern the 
sexual organs alone. The former would have been treated by the 
author had they appeared to present difficulties in his views, but they 
seem to be in general accord. Thus the simplest types of coen- 
gametes are found in the simpler groups of Phycomycetes and 
Ascomycetes, and the more complex conditions in forms above. 
If coenogametes may lead up towards a heterogamous level of 
sexual evolution, their sexual organs, while closely resembling those 
of the algae, might not be strictly homologous. Thus the eggs of 
Saprolegnia and the Peronosporales do not seem to be the exatt 
homologues of the eggs of any alga, and the female organ is unlike 
the typical oocyst because of obvious relations to coenogamete condi- 
tions. Their male organs differ from spermatocysts in their cone 
cytic behavior. Similarly the sexual organs of the Ascomycetes do 
not fall into the classification based upon the gametocyst. For these 
structutes the old designations of oogonia, ascogonia (archicarps) 
and antheridia are applicable, and they will be thus distin 
from the two main classes of sexual organs, the gametocysts and 
gametangia. 
IV. SUMMARIZED LIST OF THE SEXUAL ORGANS OF PLANTS: 
This summary presents the new terms introduced in our  scenert 
of the sexual organs of plants. As stated in the beginning of the 
paper, the establishment of a terminology is a matter of usages 
importance will rest entirely on the value of the classification wae 
ability to express the characteristics. These new terms W in Het 
chiefly the morphologist who seeks to understand and an » 
tionships. Much of the work of taxonomy disregards dificult 26 
lems of morphology, and in this subject the older descriptive a 
(oogonium, antheridium, sporangium, etc., among the a: ak 
are sure to be used, in some cases without regard to the exact 
ogies of the organs considered. 
Sporocysts are unicellular structures developing asexual spores: 
Gametocysts are unicellular structures developing uninucleate gam ssp 
unicellular structures that develop zoospores. Gamet 
differentiated into 
Spermatocysts, unicellular structures developing spe™s; 
Oocysts, unicellular structures developing eggs: 
and 
