128 BOTANICAL GAZETTE [AUGUST 
some of them, frequently persist until the sac is quite filled with 
endosperm. The embryo develops simultaneously with the endo- 
sperm, and is at first of the spherical form which appears to be 
characteristic of this family (fig. 4). 

Fics. T, 2.—Aglaonema commutatum: fig. 1, seven antipodals, two disintegrating; 
fig. 2, spherical proembryo. 
at 3, 4.—A glaonema nitidum: fig. 3, endosperm; fig. 4, proembryo. 
; IGS. 5; 6.—Anthurium crystallinum: fig. 5, longitudinal section of ovary, showing 
wo of the six ovules; fig. 6, primary archesporial cell. 
3- Anthurium crystallinum 
The flowers are perfect, the number of stamens varying from 4 
= 6. There is a broad connective, and complete differentiation 
: filament and anther, in which respect the plant differs from such 
orms as Arisaema and Aglaonema. The appearance of the tetrads 
