356 PHARMACEUTICAL BOTANY 
tain numerous, branching, protective filaments called paraphyses, 
which arise from the cells lining the cavities. ‘The antheridia are 
found as outgrowths of some of these paraphyses and produce 
Vegetative Branch 
‘> r cH 3 
Sgt —- Fruiting Branch 
: 
SS 
We, 
Hy. 
aga 
lal ae Ree 38 
ACS ESA) 
On Fanty 
By 
eae 
nese 
ay 
13 
aNd 
vt 
) 
2 
ee 
is 
OR 
P aw, 
uty. 
(Le 
1) 
ui 
UL 
Fic. 260.—Fucus vesiculosus. A, portion of plant showing habit. B, diagram 
of cross section of thallus; r, outer rind; m, loose inner pith or medulla. C, cross 
section of a fruiting receptacle. D, longitudinal section of a growing point taken 
at right angles to the flat surface, showing the pit at the bottom of which is the 
apical cell. (A, B, C, after Mottier; D, from King’s chart.) 
sperms or male sexual cells. The odgonium is a large, globular, 
stalked cell and produces eight eggs, each of which is a female 
sexual cell. The eggs and sperms escape into the sea water. 
The eggs float and are surrounded by myriads of sperms. One 
sperm, only, gains an entrance, after which its nucleus fuses with 
