in the Stock (Matthiola incana). 
453 
Figs. i-ii. Matthiola incana. I. Young siliqua before fertilization viewed from the front, 
showing the double contour line of the suture, and crosswise to the suture the two stigmatic loops. 
2. Young siliqua shortly after fertilization viewed from the side, showing one valve and development 
of the sutural knobs. 3. Apex of siliqua seen from the front, showing the horizontal ridge delimiting 
the valves. 4. The same seen from above, showing the short stylar canal. 5. A later stage seen 
from the side; the sutural knobs have now met. 6. The same seen from above. 7. Intermediate 
stage seen from the side, showing the ridge defining the valve. 8. Apex of a siliqua in which the 
sutural lines are continued up on to the shoulders of the knob. 9. Siliqua in which the carpels are 
disjoined above, seen from the front. 10. Apex of a similar siliqua seen obliquely from above and 
from the front. 11. Transverse section of young siliqua. c.a., commissural arc ; v x v. 2 , valves; coll ., 
collenchyma : cfs., central fibrous strand ; ft., fibrous tissue; fv.b., fibro-vascular bundles of the 
commissure; i.e., inner epidermis ; l.t., loose tissue of the septum which later becomes lignified ; l.v , 
lateral veins ; m.r., midrib of valve ; o.e., outer epidermis ; p., position of placenta. 
