54 



THE FRUIT. 



by dissepiments (85, c) into many cells. The central pillar, or 

 substance formed by the united placentae is called the colu- 

 mella. To tliis the seeds are generally attached. The seed- 

 vessels of the Lobelia, mullein, pink, poppy, bloodi-oot (San- 



irninaria), are capsules. 



riG. 17. — Formn of fruil : 1, capsule of Rhododendron; 2, Nicoliana ; 3, Colchicum ; 

 4, Oenothera; 5, silique of R;iphami:i ; 6, silicle of Capsella; 7, les;ume of the pea ; 8, jointed 

 Ifgiime (lomint) of Desmodium; 9, follicle of Apocynum ; 10, nut of oak; 11, drupe of 

 Ccrasus. 



2. SiT.iQn: (a pod). This is a long, narrow pericarp of two 

 Aalves, divided into two cells, by a false dissepiment formed by 

 tlic extended placenta^. The seeds are attached to the edges 

 of this dissepiment, alternating with its opposite sides. Ex. 

 mustard, wallflower, and other CrucifercC. 



0. Silicle (a little pod), differs from the silique, by being 

 .'<hortor, and mcirc nearly oval. Ex. pepper-gi'ass, shepherd's 

 purse (Thlaspi). The silique and silicle arc peculiar to plants 

 M'ith cruciform corollas. 



•1. Lkch-me (also a pod), consists of two valves, but has no 

 dissepiments, and thus differs essentially from the silique. It 

 bears its seeds attached to the margin of each valve alternately. 

 along the viMitral suture only. Ex. pea, and all other plants of 

 ihe great natural order Leguminosa>. The legume, therefore, 

 ac'com]vanios the papilionaceous corolla. 



5. Follicle (a bag) is a pericarp with one valve and one 



