114 PRINCIPLES OF BOTANY, ETC. 
drawn together, and twisted into the form 
of a cylinder, fig. 184. 
b. With a double row, (ordine duplici dentatum), 
when behind one row of teeth there is a 
second, fig. 181. 
a. Not cohering, (non coherentes), when the 
teeth of the inner row do not cohere, but 
stand free. 
fg. Cohering at the points, (apice coh@rentes). 
When the teeth of the inner row cohere 
at their points. | 
y Ciliato-dentate, (ciliato-dentatum), when 
the inner row has alternately teeth and 
bristles. 
§. Membranaceo-dentate, (membranaceo-denta- 
tum), when the teeth of the inner row 
cohere below by means of a membrane. 
E. The Epiphragm, (epiphragma), is a thin 
membrane, which stretches over {the mouth 
of the theca; it is found only in the genus 
Polytrichum, fig. 176. 
F. The Seed-column, (sporangidium s. colum- 
nula), is a slender, thread-like body, that 
passes through the middle of the theca, and 
to which the seed is attached. It is analogous 
to that body which in a capsule is called by 
the same name. _ 
G. The Apophysis is a fleshy, round, or oblong 
body, that appears at the base of the theca. 
Sometimes it is very small, and almost im- 
perceptible ; sometimes, however, larger than 
the theca itself, fig. 176, 179. : 
In 
