and climate is also greater in the former crops than in the latter. For this 

 reason local, trails are absolutely imperative and where inadequate provision 

 is made for such trials it is considered only a waste of time, energy and material 

 to attempt to obtain reliable data as to the real standing of different sorts. 

 That such trials have not thus far been made on a larger scale in Sweden has 

 been due to the cost of operating such, and to the relatively unimportant 

 place which this crop occupies in the country as a whole. Wherever trials 

 have been conducted it has been possible to include only a few sorts so that 

 many promising crossing products have had to give way to the older sorts 

 which are still under investigation and which necessarily demand considerable 

 space and attention. 



Of the cultivated Field Pease two species are commonly distinguished, 

 viz., Pisum Sativum L. which produces white flowers, and Pisum Arvense L. r 

 having red flowers. Within each of these species many different types and 

 System of varieties have been distinguished and described. In order to facilitate the 

 classification. h an( m' n g of large numbers of individuals belonging to different types Tedin 

 has devised a system of classification by which the different types are 

 arranged in groups according to the color of the flowers, stipules, leaf axils 

 and seeds as well as the shape of the seeds. In order to make this grouping 

 more suggestive, a Latin affix referring usually to the color of the seed has 

 been added to the Latin name in each case. This classification is given below 

 as follows : 



Group I. Pisum Sativum commune, H. Tedin. Flowers white. Leaf 

 axils green, unpigmented. Seed usually round or almost round with a smooth 

 or only occasionally wrinkled scale; in color yellow- white. 



Group II. Pisum Sativum glaucospermum, Alef. (Glaucospermum in- 

 dicating blueish-green seeds) . Flowers white and leaf axils green as in the 

 foregoing. Seeds also resembling the former in shape but in color green- 

 blue, green. 



Group III. Pisum Arvense unicolor, H. Tedin. Flowers colored, or 

 pigmented; standard from very light to a darker red, usually with a more or 

 less obvious shifting to violet; wings relatively dark colored, violet-red to 

 deep blue-purple. Leaf axils dark brownish purple or red-brownish. Seeds 

 one-colored (unspotted), gray-green or gray-yellow. 



Group IV. Pisum Arvense punctatum, H. Tedin. (Punctatum signifying 

 in this case "dotted" or spotted seeds). Flowers and leaf axils the same 

 color as in Group III. Seed covered with purple or blueish dots or spots. 



Group V. Pisum Arvense maculatum, H. Tedin. Maculatum indi- 

 cating here a speckled or marbled color of seeds). Flowers and leaf axis as 

 in Group III. Seeds spotted or marbled with rust-red to brownish spots. 



Group VI. Pisum Arvense punctato-maculatum, H. Tedin. Flowers and 

 leaf axils as in Group III. Seeds covered both as in Group IV (Punctatum) 

 and as in Group V (Maculatum). 



