1912J 



Goodspeed: Nicotiana Hyhrids 



103 



VI. APPEARANCE OF PLANTS IN THE FIELD 



1. Scheme for Grouping Plants on the Basis of the Com- 

 binations OF Characters which they Exhibited 



Between September 18 and 25, all the plants were carefully 

 gone over, separately examined, and the exact appearance of each 

 plant was noted under the following headings : 



I. Flower 



1. Color 



(a) pinkish 



(b) i^ink 



(c) magenta 



2. Corolla limb. 



(a) flat, pentag- 

 onal, angles 

 shallow 



(b) cut into lobes 

 tipped with a 

 recurved hook 



II. Habit 



1. Tall 



2. Short 



3. Spreading 



4. Not spreading 



HI. Leaf 



1. General shape 



(a) elongated 

 lanceolate 



(b) ovate sub- 

 rotund 



(c) lanceolate 

 subrotund 



2. Leaf tip 



(a) Slender- 

 pointed and 

 curving 



(b) sharp pointed 

 and not as (a) 



3. Auricle 



(a) flat 



(b) ruflled. 



On the basis of such a tabulation of characters, a plant which 

 reproduced the N. Tahactim var. virginica parent in appearance 

 would have been noted as follows : 



Flower color — Pinkish. 



Shape of corolla limb — Cut into lobes each tipped with a 

 recurved hook. 



Habit — Tall and with no laterals broadly spreading from the 

 base. 



Leaf shape — Elongated lanceolate with the tips of the leaves 

 slender-pointed and curving and the auricle ruffled. 



Similarly for a plant reproducng the N. Tabacum var. macro- 

 phylla parent in appearance: 



Flower color — Red. 



Corolla limb — Pentagonal with the angles shallow and not 

 hooked. 



