EXPERIMENT STATION REPORT 



271 



within its stipules. The cotyledons show that they have given 

 up nearly all their food. By the use of ink markings, the stem 

 is found to elongate throughout its whole length. Sections of 

 the stem and root now will show all the structures well developed. 

 At this stage, a branch from an axil of the first or second leaf 

 may develop at the expense of the main stem which then ceases 

 growth. Branches also start from the axils of the cotyledons. 



The early development of pea seedlings is shown in Plate 

 XXVII, where in the upper row seedlings of "Tom Thumb," 

 a dwarf variety, are shown in daily succession from time of plant- 

 ing to seventeen days old; in the middle, the seedlings of "French 

 Canner," a medium-sized variety, for twenty-one days, and in the 

 lower part a corresponding series for tw'enty-one days for the 

 "Gradus," a standard variety. 



POINTS IN THE CLASSIFICATION OF PEAS. 



Whole Plant. 



Leaves. 

 Leaflets. 



Inflorescence : 

 Flower . 



Fruit , 



Seeds , 



Size: Standard (4-5/4 ft.) Medium (21^-31^ ft) 



Dwarf (1-2 ft.). 

 Color : Light green ; dark green. 

 Length of internodes: Short (2-4 cm.); Medium (4^- 



6I/2 cm.) ; Long (7-9 cm.). 

 Commencement of blooming from time of planting: 40- 



65 days. 

 Maturity period from time of planting: 75-100 days. 

 Size : Large ; small. 

 Color : Light green ; dark green. 

 Size : Large ; small. 

 Form : Entire ; serrate. 

 Apex : Obtuse ; acute. 

 Number: Two; more than two per leaf. 

 Flower single ; flowers in pairs. 

 Size : Large ; small. 

 Color : White ; pink. 

 Position : Erect ; drooping. 

 Size: Small (5-6J/2 cm.); ^Medium (7-8 cm.); Large 



(8^-11 cm.). 

 Color : Green ; green "wax." 

 Form : Flat ; round ; inflated. 

 Shape : Curved ; straight. 

 Apex : Sharp ; blunt. 



Number per plant: Few (5) ; many (50). 

 Size : Small ; medium ; large. 

 Color : Cream ; green ; brown. 

 Form : Round ; lenticular ; drum ; elongated. 

 Surface : Smooth ; dented ; wrinkled. 

 Weight : 2.5-9.0 gms. per 25 seeds. 

 Number per pod: 4-8. 

 Imbibition capacity : 65 per cent. -165 per cent, of its 



own weight during the first 24 hours. 



