224 BOTANICAL GAZETTE [MARCH 
antarctic regions during January and February 1902, and in November and 
December of the same year. The South Shetland Islands and Graham Land 
(Louis Phillippe Peninsula, the Palmer Archipelago, Ross Island, and Snow Hill 
Island) were visited. The purpose of the paper is to give a short description of 
the meteorological and hydrographical conditions which rule the antarctic marine 
flora, a general survey of its appearance, and a rough sketch of its systematic 
composition. A list of 35 species of antarctic algae is furnished. According to 
the ae ‘the general character of the flora of the Graham region discloses 
. several interesting, probably ancient, endemic types, and a large percent- 
age a capa ceed magellanian, species. Nothing favors the so-called 
bipolar forms.” —JosEPHINE E. TILDEN. 
Morphology of Cephalotaxus drupacea.—lIt is interesting to compare the 
results of the study of Cephalotaxus Fortunei by COKER?! with the results obtained 
by Lawson”? in a study of C. drupacea and published almost simultaneously. 
The two accounts are so nearly identical in the main features, that one may have 
a feeling of confidence that our knowledge of the structures described in these 
papers is well established for the genus. Cephalotaxus has been a genus of special 
interest on account of its supposed primitive character, emphasized in recent 
years by the study of its vascular anatomy. The studies of the reproductive 
structures seem to contradict this claim to a certain extent, as have all recent 
similar studies of other Taxineae. 
The main results of LAwson’s study of C. drupacea may be summarized as 
follows: In the germination of the microspore no prothallial cell is cut off, and 
before pollination the generative and tube nuclei have been organized. Pollina- 
tion occurs late in March, but no further nuclear divisions take place until the 
following spring, when the pollen tube begins to penetrate the nucellus and the 
generative nucleus divides. When the tube has reached the archegonial chamber, 
which takes about ten days, the nucleus of the body cell divides, forming two 
sperm nuclei of equal size, but with no wall-formation. The female gametophyte 
develops in the usual way, with free nuclear divisions, vacuolation and the pari- 
etal placing of the free nuclei, wall-formation, and centripetal growth. Four 
archegonia are organized, each with a distinct chamber, and with two or frequently 
three neck cells. A ventral canal nucleus is cut off and degenerates before fer- 
tilization. In fertilization the entire contents of the pollen tube are discharged 
into the egg, but the two’ sperm nuclei are not released from the membrane of 
the body cell until the interior of the archegonium is reached. The fusion nucleus 
gives rise to four free nuclei near the center of the egg, which pass toward the 
bottom, accompanied by the various food materials, where divisions continue 
until sixteen free nuclei are formed, when the first walls appear. Finally four 
2t COKER, W. C., Fertilization mn embryogeny in Cephalotaxus Fortunei. Bot. 
GAZETTE 43:1-10. fl. 1. figs. 5. 19 
a A. A., The leanne fertilization, and embryo of Cephalotaxus 
drupacea. ‘awk of Botany 21:1-23. pls. 1-4. 1907. 
