Elm, American 34 cork 34 red 35 rock 34 slippery 35 water 35 winged 34 Gum, cotton 62 sour 62 sweet 43 tupelo 62 Hackberry 36 southern 36 Haw, green 48 red 48 Hawthorn, cock-spur 47 dotted 47 green 48 red 48 Hedge apple 37 Hercules' club 63 Hickories, key of Illinois 13 Hickory, big shell-bark 16 bitternut 14 Buckley's 18 king-nut 16 mockernut 17 pecan 15 pignut 18 shag-bark 16 sweet pignut 17 water 14 white 17 Honey locust 51 Hornbeam, American 19 hop 20 Horse-chestnut 59 Kentucky coffee-tree 52 Larch, American 6 European 6 Linden, American 60 Locust, black 53 honey 51 water 51 Magnolia, cucumber 39 Maple, ash-leaved 58 black 56 Norway 58 red 57 river 57 silver 57 sugar 56 swamp 57 Mulberry, red 38 Russian 38 white 38 Oak, basket 26 black 29 black jack 32 bur 25 chinquapin 26 jack 29 northern pin 29 northern red 28 overcup 24 pin 30 post 27 red 28 rock chestnut 26 scarlet 30 shingle 33 Shumard's 28 southern red 31 Spanish 31 swamp chestnut 26 swamp Spanish 31 swamp white 25 white 24 willow 33 yellow chestnut 26