Category: Nature/Gardening/Animals
Acknowledgments 4 Introduction 5 Illustrated Glossary 6 Key to the Trees of Illinois in Spring, Summer, and Fall 9 Key to the Trees of Illinois in Winter 27 Trees of Illinois 38 Special Places to Study Trees 318 White Oak, the State Tree of Illinois 322 Illinois Big Tree Champ...
Leaves: Alternate, simple; blades elliptic to oblong-lanceolate, pointed at the tip, rounded at the slightly asymmetrical base, up to three inches long, doubly toothed along the...
8. Part 8Many other hawthorns occur in Illinois. Several of them have been found only a very few times. Most of them are difficult to distinguish unless leaves, flowers, and fruits are a...
7. Part 7Distinguishing Features: Mockernut Hickory is distinguished from all other Illinois hickories by its usually 7 or 9 hairy leaflets with hairy leafstalks and hairy twigs. The lar...
5. Part 5Leaves: Opposite, simple; blades up to 6 inches long and nearly as broad, palmately 3- to 5-lobed, drooping on the sides, the edges of the leaves sparsely and coarsely toothed,...
11. Part 11Leaves: Alternate, simple; blades ovate, rounded or bluntly pointed at the tip, heart-shaped at the base, up to 8 inches long, up to 6 inches broad, with rounded teeth along the...
13. Part 13Flowers: Staminate and pistillate borne separately, but on the same tree, appearing when the leaves begin to unfold, minute, without petals, the staminate in slender, drooping c...
6. Part 6Leaves: Alternate, simple; blades ovate, pointed at the tip, more or less rounded at the base, up to 3 inches long, over half as wide, coarsely toothed, dark green and smooth on...
12. Part 12Leaves: Alternate, simple; blades divided into 5-7 rounded lobes, the sinuses shallow to deep, up to 10 inches long, up to 4½ inches broad, dark green and smooth on the upper su...
10. Part 10Leaves: Alternate, simple; blades mostly ovate, abruptly pointed at the apex, more or less heart-shaped at the base, up to 6 inches long and sometimes nearly as broad, coarsely...
9. Part 9Leaves: Alternate, simple; blades obovate, rounded or short-pointed at the tip, rounded or sometimes tapering to the base, up to 6 inches long, sometimes nearly half as broad, u...
1. Part 1Acknowledgments 4 Introduction 5 Illustrated Glossary 6 Key to the Trees of Illinois in Spring, Summer, and Fall 9 Key to the Trees of Illinois in Winter 27 Trees of Illinois 38...
4. Part 41. Leaf scars absent (scars which resemble leaf scars present but lacking bundle scars) _Taxodium distichum_ 1. Leaf scars present. 2. Leaf scars in whorls of 3 _Catalpa spp._ 2...
2. Part 21. Most or all of the leaves more than six inches long. 2. Leaves long-tapering to the base; winter buds elongated, about ⅛ inch long, covered with reddish-brown hairs _Asimina...
15. Part 15The main objectives of this Division are to promote and achieve on suitable public and private lands the establishment, protection, management, use, and perpetuation of our tree...
3. Part 31. Leafstalks with milky sap when broken. 2. Leafstalks and lower surface of leaf with long hairs _Broussonetia papyrifera_ 2. Leafstalks and lower surface of leaf smooth or wit...
16. Part 16DISTRICT 1 JO DAVIESS STEPHENSON CARROLL WHITESIDE DISTRICT 2 WINNEBAGO BOONE OGLE DE KALB LEE DISTRICT 3 McHENRY LAKE KANE COOK DU PAGE KENDALL WILL GRUNDY KANKAKEE DISTRICT 4...