UNIVERSITY 



OF 



VARIETIES OP LETTUCE. 275 



California lettuce product. It is customary to arrange 

 lettuce varieties in two groups; one has roundish heads 

 and includes the "cabbage" varieties; the other has tall, 

 elongated heads and includes the "cos" varieties. There 

 is, of course, much difference in the density of the heads, 

 and some are quite loose and open, properly called "bunch- 

 ing," but the close-heading varieties are better and the 

 more suitable for market handling. In California the cab- 

 bage varieties vary largely preponderate over the cos 

 varieties, and the non-heading "or "cutting lettuces," or 

 curled varieties, are not widely grown, though they may 

 be found useful in getting the quickest foliage from the 

 seed sowing. It should be noted that compared with the 

 cabbage type, the cos lettuce is hardier and less suscep- 

 tible to frost; it also shows more ability to withstand 

 drought and is also less liable to sunburn, the last two 

 features making it better adapted to hot and dry locali- 

 ties, while the first is one which especially recommends its 

 use as a late kind. 



Large Passion: medium sized, round head, fine, large, 

 solid, and white, crisp, tender, and of fine flavor; not as 

 fine in appearance as some others, but it stands handling 

 better, and is very good for shipping. 



Royal Summer : known in the East as California Cream 

 butter, large, solid, round heads, light green outside, 

 creamy yellow within; stands heat well, particularly 

 popular for autumn and winter use. 



Maximum or Immensity : very much larger than the fore- 

 going which it resembles ; good for fall and winter growth 

 and a heavy, durable shipping variety. 



Big Boston: a light green cabbage variety with light 

 brown tinge to the leaves ; largely grown in the south for 

 northern shipments; forms a fine head, endures tempera- 

 ture changes well. 



May King : a very early, quick heading variety, colored 

 like Big Boston ; good for spring and summer use. 



White Paris Cos : upright grower, with long head ; needs 



