14 BULLETIN 813, TJ. S. DEPARTMENT OE AGRICULTURE. 
variety. For this reason and in the interest of simplicity of nomen- 
clature, the name Open Productive has been dropped and Eureka 
adopted in its place. 
The habit of production of the trees of the Eureka strain in the 
performance-record plats includes the heavy bearing of high-quality 
fruits "which first set at the ends of the branches, frequently in clus- 
ters. As the branches bend down from the weight of the end fruits, 
others set along the branches in the axils of the leaves until 15 to 20 
fruits are sometimes produced by a single branch. The lemons 
develop in their order from the tip to the base of the branches. The 
trees have a tendency toward regular production throughout the year, 
in contrast with the trees of some other strains which tend to bear 
their crops largely during the fall or the spring or some other limited 
season. The comparatively heavy production of good commercial 
lemons regularly throughout all seasons of the. year under normal 
conditions is a very important characteristic of the trees of this 
strain. 
The habit of growth of the trees is open, as shown in figure 1. 
Usually the fruits first set at the ends of the branches, and as the 
lemons develop in size and weight the limbs are pulled down in a 
somewhat drooping position, as shown in figure 3. This condition 
results in a somewhat open and drooping arrangement of the branches, 
and, as a result, the trees are opened up to the sun and air. One dis- 
advantage of this habit of tree growth is that the fruits are more 
likely to be injured by sunburn or extreme climatic conditions than 
those borne by trees having a dense habit of growth. Few or no 
suckers are produced by the trees of this strain. The leaves of the 
trees of the Eureka strain are rather sparse in number, usually of 
medium size, broadly elliptical and bluntly rounded in shape, with 
slightly crenate margins and of a deep-green color. The rounded 
leaves in contrast with the sharply pointed ones of some other strains 
are a striking and important characteristic of the trees of this strain. 
The blossoms are perfect, as shown in figure 4 ; A, and the anthers 
produce viable pollen." Under normal conditions the trees bloom to 
some extent at all seasons, but most heavily during the spring and 
fall months. There is no period of the year when blooms and fruits 
in various stages of growth are not present. 
The typical fruits of the Eureka strain, as shown in Plate I, are ob- 
long in shape, medium in size, with smooth texture, thin rind, tender 
rag, an abundance of juice, and have an average of about seven seeds. 
Frequently the fruits are slightly ridged. The flesh of the fruits is 
usually solid and firm. When cured they have a very smooth, satin- 
like texture and a light-straw color. The receptacle, or button as it 
is ordinarily called, is usually raised above the surface of the rind 
somewhat, so that in picking it is possible to sever the stem close to 
the button without injuring it or the rind with the clippers. Under 
