Glossary 415 



Protoplasm. The living substance of any plant cell. 



PsEUDO. False. 



Pustule. A blister or pimple. 



Pycinidia. Sack-shaped fruiting bodies of a fungus in 



which the pycniospores or summer spores are formed 



non-sexually. 

 Pycniospores. Non-sexual summer spores borne in pyc- 



nidia. 



Saprophyte. A micro-organism living on dead organic 

 matter. 



ScLEROTiUM (sclerotia). Compact mass of mycelium in a 

 dormant state, living over from year to year. 



Septum. Any partition between two cells in the same fun- 

 gous filament. 



Set^. Bristle-shaped bodies of fungi. 



Soil flora. Bacterial or fungus growth of a soil. 



SoRUS. Heap of spores. 



Sporangiophore. Stalk bearing sporangium. 



Sporangiospores. Spores formed in a sporangium. 



Sporangium. Free, non-sexual bearing spore sack. 



Spore. A cell capable of reproducing a plant like its 

 parent. It corresponds in function to the seeds of 

 higher plants. 



Stomata. Minute openings in the stems, leaves or fruits 

 of plants which serve as a medium of exchange of 

 plant gases. 



Stroma. A spore-bearing cushion composed of mycelium 

 and sometimes of host tissue. 



Swarm spores. Spores possessed with the power of mo- 

 tion, or motility. 



Teleutospores (teliospores), resting or winter spores of 



rust fungi. 

 Telium. a sorus in which teleutospores are borne. 



