October 26, 1907 109 
COMPILATIONS 
Under this head it is our intention to publish each month, 
or as often as space may permit, either entire reprints or synop- 
ses of articles which appear in journals not accessible to those 
who have limited library facilities. Other botanists are cord- 
ially invited to contribute, both by sending material for this de- 
partment, or by pointing out where it may be obtained. 
SAGITTARIA ARIFOLIA NuTr. IN NorTH Dakota. By J. Lun- 
ell, Bull. Leeds Herb. 1: 1-4. S. 3. 1907. 
The only representatives of the genus Sagzttarta known to 
me within the state are the plants whose present names are 5S. 
arifolia Nutt. and S. cuneata Sheldon. Fr. Buchenau in 
Engler’s Pflanzenreich IV. 15. p. 49, from his distant German 
study correctly pronounced .S. cuneata a “species dubia affinis 
S. arifoliae.’ 1 have made a study of these plants with an en- 
deavor to penetrate the mystery enveloping the actual relation- 
ship between them. 
The plant springs up from a winter bulb, who has the size 
from a small pea to a hazel nut. This emits a crown of phyl- 
lodes if water covers it; else, if exposed to the air, it brings forth 
ab initio linear leaves, having the same size and position as the 
phyllodes. 
If the winter bulb is situated in the mud 1 or 2 feet beneath 
the surface of the water, it emits in the first place a bunch of 
small phyllodes. One of these phyllodes commences shooting 
upwards. It is a tiny, tender one, and it has a considerable 
length when it reaches the surface. A few days later another 
small (phyllode pushes itself up in the same way, and a few phyl- 
lodes, one at a time, try the same experiment, in order to enjoy 
the air and the sunlight, though the majority of them remain 
small phyllodes of the original kind. The growzug phyllodes 
who do not reach the surface of the water are identical with the 
long kind described in the text-books under .S. cuneata. When 
the long phyllodes have reached the air, a lamina is formed. 
