252 DEHISCENCE OF THE ANTHER. 
practical botany such anthers, like the former, are said to dehisce 
transversely. 
3. Porous or Apical.—This is a mere modification of longi- 
tudinal dehiscence. It is formed by the splitting down of the 
Fie. 535. 
Fie. 536. Fic. 537. Fic. 538. Fia. 539. 
Fig. 535, Stamen of the Mallow (Malva), the anther of which has an appa- 
rently transverse dehiscence.— Fig. 536. Two-celled anther of the Pyrola 
rotundifolia, suaspendea from the filament, 7. 7. Loculi, each opening by 
a pore, p.— Fig. 537. Quadrilocular anther of Poranthera, attached to 
filament, f. J. Loculi, each opening by a pore, p.— Fig. 538. Anther of 
Tetratheca juncea, opening by a single pore at the apex. These figures are 
from Jussieu. Fig. 539. Anther lobes of a species of Solanum, each 
opening by a pore at the apex. 
anther lobes being arrested at an early period so as only to pro- 
duce pores or short slits. In such anthers there is commonly 
no trace of the sutures to be seen externally. The pores or slits 
Fie. 541. 
Fie. 540. 
Fig. 540. Amnther of 
Barberry (erberis 
vulgaris), opening 
by two valves. 
Fig. 541. Stamen of 
a species of Laurus. 
jf. Filament, with 
two glands, g, g, at 
its base. J, J. Lo- 
euli, of which there 
are four. v. Valves. 
may be either situated at the apex, as in the species of Sola- 
num (fig. 589) and Milkwort (fig. 515); or laterally, as in the 
Heaths (fig. 532, r). There may be either two pores, as is 
