Keizmenge f 

 Reizmittel n 



reizpercipierendes Organ n 

 Reizschwelle f 



Reizstärke f 

 Reizstellung f 



Reizübertragimg f 

 Reizung f 

 Reizursache f 



Keizvorgang m 



Reizwirkung f 

 Reliktendemisma n 

 reparativer Wurzelspross m 

 Reservestoff m 

 Reservestoffbehälter m 

 Reservestofforgan n 

 resinogene Schicht f 



Retortenzelle f 

 Rettich m 

 Rettich-Hederich m 



Rhabarber m 

 rhizogene Schicht f 

 richtender Reiz m 

 Richtungsbewegung f 

 Riedgräser n pl 

 Rief 1 



Riff r 



Riemenblumcngewächse n pl 

 Rille f 

 Rinde f 

 rindenbewohnend a 



energy of stimulation 



stimulant, irritant 



sensitive organ, tactile organ 



minimum stimulation needed 

 to produce reaction 



energy of stimulus 



position assumed as a result 

 of stimulation 



transmission of stimulus 



stimulation, excitation 



source (or cause) of stimula- 

 tion 



process of stimulation and 

 transmission 



effect of stimulation 



surviving endemic form 



compensatory sprout 



reserve material 



storage organ 



storage organ 



secretive wall layer (of secre- 

 tory cell) 



ampulla 



black radish 



wild radish, Ra-phanus Ra- 

 phanistrum 



rhubarb 



pericambium 



formative stimulus 



orientation jnovement 



Cyperaceae 



carina, ridge 



Loranthaceae 



valecula 



bark, cortex 



growing on the outer bark 



95 



