104 PEACTICAL BOTANY. 



Periblem, distinct from the rest. 



Plerome, distinct. 



To this type belong most of the Dicotyledons. The 

 work may be equally well done on Linum usitatissimum, 

 or Polygonum Fagopyrum. 



Type II. Prepare median longitudinal sections of the 

 apex of the radicle of Phaseolus multiflorus (the 

 Scarlet-Runner), and treat as the above. Examine with 

 a. low power and make out 



1. Calyptra (Eoot-cap). 



2. Epidermis. 



3. Periblem. 



4. Plerome, forming the procambium and pith. 



But here all the different tissue-systems will be 

 found to originate from a general meristem, the original 

 formative tissue of none of them being distinct from 

 that of the others. This type may be expressed 

 shortly, thus : 



Calyptrogen \ 



Dermatogen ( All united in a general, undifferen- 



Periblem ( tiated mass of meristem. 



Plerome / 



As alternative plants of the same type, may be 

 named Cucurbiia and Pisum. 



VEGETATIVE ORGANS. (B.) MONOCOTY- 

 LEDONS. 



EMBEYO AND GERMINATION. 



Soak fruits of the Maize (Zea Mais) in water for 

 several hours. 



N.B. The fruit is a caryopsis, and results from the develop- 



