46 ' Elementary Plant Physiology. 



the stem into several small pieces, and allow the sections to lie 

 on the soil. Observe the origin of new plants and the develop- 

 ment of roots and leaves ; compare with those on the main 

 stems before cutting. 



42. Propagation by various organs. Secure entire 

 living specimens of Kleinia, Bryophyllum, or tubers, bulbs, or 

 corms of Aristzma, lily, crocus, onion, Narcissus, or any con- 

 venient form, and make experimental cuttings to ascertain 

 what portions may propagate the species. 



It would also be of great interest to cultivate cuttings of such 

 plants as Marchantia or some moss in a small moist chamber 

 made of two glass dishes, and containing some moist sand. 



