330 The Botanical Gazette. [August, 
and send strong haustoria into the calyx tube. The pa 
renchyma cells of the calyx tube lying between these haus- 
toria are marked by their large size and thin walls. Here, 
to all appearances, the developing embryo secures the greater 
part of its nourishment. In addition to obtaining food the 
endosperm collar has a purely mechanical function. The 
fruit of Brugutera ertopetala falls off when the hypocotyl has 
reached a length of 8 or 9™. The young seedling at this 
stage possesses neither sufficient strength nor firmness, nor 
does it fall far enough to fix it vertically in the slimy soil. 
This, position is secured by means of the firm, pointed calyx 
lobes which serve as an anchor. At the same time the 
strongly turgescent endosperm collar takes up water and in- 
creases considerably in thickness, thus acting as a wedge to 
separate the calyx from the hypocotyl and reminding one of 
the lodicules in grasses which, according to Hackel,” by their 
rapid swelling push away the glumes and thus effect the 
opening of the flower. 
Haberlandt undertook a quantitative analysis of the chlor- 
ophyll in the hypocotyl of Bruguiera eriopetala, to ascertain 
whether there was a sufficient amount present for the neces 
sary assimilative processes. He found the chlorophyll content 
of the hypocotyl to be rather more than half the amount con 
tained in a single foliage leaf. He also found that in this 
species there are about five stomata to every square millimeter 
of hypocotyl surface. 
ot ap- 
n tne 
hypo 
cotyl pierces the testa but does not enter the fruit, an te 
formation of endospermal haustoria takes place only 
region of the placente. : tant contti- 
he paper here noticed is one of the many impor nated from 
butions to botanical knowledge which have emanate eTTE, 
the Buitenzorg botanic garden. (Cf. BOTANICAL x 
19: 74. 1894.—G. H. Hicks. 
"Ueber das Aufbliihen der Graser. Bot. Zeitung 38: 432. 1880. 
