= 
. rT eed a : - ain 
in . ‘y : 2 i 
Ci ae ; re 
‘ak 3 Y J S 
Ap ~~ 
The External Form of Plants. 149 
apex (Fig. 306), it is said to dehisce by decth, as in most 
Caryophyllacez ; the capsule of Lychnzs diurna, for example, 
dehisces by ten, that of Githago segetum by five teeth. If 
the dehiscence takes place right to the base of 7 
the capsule it is said to be valvular or sutural, 
the number of valves depending on that of the 
placente or carpels. It is Joculicidal (Fig. 307) 
when the walls of the loculi split open so that 
the septa remain attached to the valves, as in 
Tris or the lilac; septicidal (Fig. 308), when, as 
in! Colchicum, the septa themselves split down Pee ee 
* the middle and fall off with the valves ; septi-  7#/* | dehise- 
ing , by - ten 
fragal (Figs. 309, 310), when the valves separate teeth. 
from the septa and fall off alone, as in Datura. More rarely 
the upper part of the capsule becomes detached in the form 
> ee 
>. 307-—Diagram ofa locu- Fic. 308.-—Diagram of a sep- Fic. 309.—Diagram of a sep- 
licidal capsule. ticidal capsule. tifragal capsule. 
of a cap or lid, when the dehiscence is said to be transverse 
or circumscissile, [and the capsule is termed a pyxzs|, as in 
flyoscyamus and Anagallis (Figs. 311, 312). Some capsules 
again dehisce by ores (Fig. 313), as the poppy, Campanula, 
- placentation. 
/ 
&c. Capsules may be unilocular or multilocular, superior 
or inferior, and may have free central, axile, or parietal 
Follide (Figs. 314, 315) 1s the term given to a unilocular 
capsule which dehisces only by the ventral suture. The 
capsule of* Leguminosz [which is always unilocular and 
mcnocarpellary, and dehisces by both ventral and dorsal 
\ 
