The Periodicity of Semi-Latent Characters. 329 



the course of the summer. They were spHt fasciations, 

 but the division had gone somewhat deeper, as was vis- 

 ible by the individual leaves being torn from below up- 

 wards with one half adhering to the one arm of the 

 fork and the other half inserted on the other arm. Such 

 leaves occurred on several shoots, but, as already stated, 

 always at the same height on the plant. 



The lower end of many racemose inflorescences is 

 a favorite place for anomalies. Thus slightly double 

 varieties of Gladiolus bear double flowers almost always 

 in this position only. The racemes of Primus Padiis 

 bear lateral racemes in this position almost exclusively; 

 and, in other cases, it is also only in this position that 

 tetramerous flowers are borne. Many double varieties 

 are known to bear single flowers at the end of the flow- 

 ering period, and sometimes also at the beginning. These 

 flowers alone set seed, while the double ones are sterile. 



It is well known amongst horticulturists that in multi- 

 plying perennials and bulbs by seed, the value of the 

 plants cannot definitely be estimated in the first year in 

 which they flower. It is not until the second or the 

 third year of the flowering that their qualities are dis- 

 played to their full advantage. Many specimens of 

 Chrysantheimun indicwn, which when raised from seed, 

 are only half double in the first year, will develop double 

 flowers in the second year if grown from cuttings.^ The 

 varieties with tricolored leaves of Pelargonium ::onale 

 tricolor do not exhibit their full range of color until the 

 second year after their seed is sown.- To breeders of 

 tulips, hyacinths and other bulbous plants this rule is 

 well known. 



*Reid and Bornemann*3 Catalogue, 1891, p. 20. 

 Sutton's Catalogue, 1891, p. 77. 



