ORIGIN OF NEW PLANTS FROM ROOTS 315 



buds, and may be used in the experiments. Another fern, 

 Ceratopteris thalictroides, often cultivated, offers interesting ma- 

 terial for these tests. 



406. Propagation of Lycopodium. Examine vigorous specimens 

 of Lycopodium lucidulum for the wedge-shaped or heart-shaped 

 bodies to be found in the axils near the apices of the stems. 

 Place a number in a moist chamber and note the manner of their 

 germination. Cut into 

 halves by longitudinal and 

 transverse incisions, and 

 ascertain the location of 

 the growing points. Test 

 endurance to desiccation, 

 and determine character 

 of storage material * (Fig. 



407. Vegetative Repro- 

 duction by Means of Buds 

 Among the Seed Plants. 



The development of new 

 individuals from buds 

 formed on various por- 

 tions of the bodies of 



. . , FIG. 148. Development of propaeative buds 



higher plants is exhrbited ol Asplmium tulbifmm . After Atkinson, 

 in great variety. It will 



be convenient to discuss some of the principal types according 

 to the member from which the propagating body arises. 



408. Origin of New Plants from Roots. The roots of a large 

 number of plants are capable of forming buds which reproduce 

 the individual. This capacity is shared by Botrychium, Ophio- 

 glossum and perhaps other ferns. Buds are generally developed 

 on old roots in which decortication has occurred, and secondary 

 thickening has taken place, and those forms which have been 

 specialized for this purpose by the deposition of a large amount 



1 Sterns, E. E. The bulblets of Lycopodium lucidulum. Bull. Torr. Bot. Club. 

 15: 317. 1888. 



