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 develojj- 

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

 stems before cutting. 



42. Propagation by various organs Secure entire 



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

 corms of Ariscema, 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. 



