56 



STRUCTURAL BOTANY. 



thick, leathery, separable from the pulpy mass within (Orange, 

 Lemon). 



161. Pepo, an indehiscent, compound, fleshy fruit, with a 

 hardened rind and parietal placenta (Melon). 



162. The pome is a fleshy, indehiscent pericarp, formed of 

 the permanent calyx, containing several cartilaginous (Apple) 

 or bony (Haw) cells. 



163. The pyxis is a many-seeded, dry fruit, opening like a lid 

 by a circumscissile dehiscence (Plantain, Henbane, JefFersonia). 



164. The follicle is a single carpel, 1-celled, many-seeded, 

 opening at the ventral suture (Columbine, Larkspur, Silk-grass). 



186 



191 



/VV*.-185. Etairio of Rubus strigosus (Blackberry). 186, Pcpo; section of Cucumber. 187, Berry 

 Grape. 188, Pome, Oata^us (Haw). 189, Pyxis of Jeffersonia. 190, Legume of Pea. 191, Loment of 

 Desmodium. 192, Silique of Mustard. 193, Silicic of Cupsella. 



165. The legume, or pod, is a single carpel, 1-celled, usually 

 splitting into two valves, but bearing its 1 GO seeds along the 

 ventral suture only, in one row, as in the Bean and all the 

 Leguminosae. It is sometimes curved or coiled like a snail-shell 

 (Medicago). The loment is a jointed pod, separating across 

 into 1-seeded portions (Desmodium). 



166. Silique. This is also a pod, linear, 2-carpelled, 2-valved, 

 2-celled by a false dissepiment extended between the two parie- 

 tal placenue. To this false dissepiment on both sides of both 



