1912] Goodspeed: Xicotiana Ilijhrids 137 



2. Number and Condition of the Plants in the Field 



It was not found possible to work with the N. acuminata 

 plants in the field before the first week of August. Among 

 parents and hybrids the following table gives the number of 

 vigorous plants in each case at this time, the dates upon which 

 each group first flowered, the date upon which the last flowers 

 were measured and the number of plants left on November 20. 



The parents, though on the same strip of land with the 

 hybrids, were far from being vigorous plants and remained 

 throughout, with the exception of variety I, stunted and sickly. 

 In variety I the plants were identical with the smaller individ- 

 uals described in the previous year's work on this number. The 

 flowers were, of course, in all the parents not nearly so abundant 

 as in the previous year and in the case of variety II it was 

 possible to measure only ninety-nine flowers. The leaf and 

 general habit characters were again identical, though, as noted, 

 the plants throughout all three varieties were smaller in vegeta- 

 tive characteristics than as observed in 1910. 



3. General Habit of the Hybrid Plants 



Among the hybrid plants each plant has been carefully gone 

 over during the season and the following points noted. The 

 leaves, cauline and radical, were exactly the same throughout. 

 It lias not l)een possible comparing leaves from corresponding 

 regions on any two plants to tell them apart except in the 

 matter of slight variations in size, nor are there distinguishing 

 marks when compared with the leaves of 1910 and 1911 parents. 

 Ill habit the hyl)rids were identical with tlic h-ibit of the parents 



