INTRODUCTION 
The Rocky Mountain States embrace greatly varied conditions for 
plants. Nevertheless they are rather generally occupied by a considerable 
number of fruit-bearing species (see Table 2). Three supplemental tables 
(3 to 5) list plents of more restricted distribution, while another three 
(6 to 8) show extralimital plants that have proved satisfactory on trial 
in parts of the region most densely inhabited by man. 
Table 1 shows grouns of fleshy fruits most attractive to birds 
throughout the United States and lists desirable kinds of birds most fond 
of the fruit. No barberries, currants, or buckthorns are listed, because 
theyharbor rusts destructive to plants of economic importance. Junipers 
are in almost the same category, as they serve as alternate hosts for 
apple rust, but there is no reason why they cannot be used in districts 
where apples are not commercially grown, as they are among the most 
valuable plants for wildlife. Omitted elso are plants voisonous to man 
On contact, as poison ivy and poison sumac, as well as various kinds 
dangerously poisonous to domestic animals, as yews, wild cherries, and 
nightshades, in spite of the fact that wild cherries are greatly relished 
by birds. Browsing animals are known to have been killed by feeding on 
the leaves of wild cherries but do not seem to be so seriously affected 
by those of olums. Certain vlants included among flesny fruit bearers in 
previous publications nave been transferred to the list of seed producers, 
henee do not appear in the present series of leaflets. These include 
magnolia (Magnolia), bittersweet (Celastrus), and burningbush (Euonymus). 
It should be noted that the fruit-bearing seasons recorded, being 
collected from varied sources, tend to be maxima. As a rule they are not 
likely to be realized or even approached in a single locality unless 
numerous specimens of a given species are present and so distributed in 
sun and shade as to favor both early and late fruiting. 
The word "extralimital" as here used in certain table headings 
eoversplants from other States or regions of the United States as well 
as wholly introduced, exotic, or foreign plants. 
ae 
