uii3ijruuuj.vt3 uuarauijer. 



It is also hoped that the numerous drawings (many of which 

 are reproduced from sketches made twenty-three and twenty-four 

 years ago) will serve a similar purpose, and help to make clear any 

 little obscurities in the text. With a view to encouraging still 

 further research, references to coloured plates and good figures in 

 standard botanical and horticultural works have also been added 

 after the descriptions of many species and varieties. 



JOHN WEATHEES. 



