Oaks, of Illinois, a key 23 Ohio buckeye 59 Orange, osage 37 Papaw 41 Paulownia 66 Pecan 15 Persimmon 63 Pine, Austrian 4 jack 5 Scotch 5 shortleaf 5 white 4 Plane tree 44 Plum, Canada 49 wild 49 wild goose 49 yellow 49 Poplar, balsam 9 Carolina 9 European white 9 Lombardy 9 yellow 40 Redbud 52 Red cedar 7 Sassafras 42 Service-berry 46 smooth 46 Shadblow 46 Sour gum 62 Spruce, Norway 5 Sweet gum 43 Sumac, shining 55 smooth 55 staghorn 55 Sycamore 44 European 44 Tamarack 6 Thorn, cock-spur 47 dotted 47 pear 47 Washington 48 Tree of Heaven 54 Tulip tree 40 Tupelo gum 62 Walnut, black 11 white 12 Willow, black 10 crack 10 peach-leaved 10 weeping 10 white 10 See pages 70 and 71 for Index of Scientific Names +WHITE PINE+ _Pinus strobus_ L. [Illustration: WHITE PINE Two-thirds natural size.] THE white pine is found along the bluffs overlooking Lake Michigan in Lake and Cook counties and is also scattered along river bluffs in Jo Daviess, Carroll, Ogle and LaSalle counties. The only grove of this beautiful tree in Illinois is in the White Pines Forest State Park near Oregon, Ogle County, where there are trees over 100 years old that have attained a height of 90 feet with a diameter of 30 inches. This tree formerly formed the most valuable forests in the northeastern United States, stretching from Maine through New York to Minnesota. The straight stem, regular pyramidal shape and soft gray-green foliage made it universally appreciated as an ornamental tree and it has been freely planted throughout the State.