ANALYTICAL KEY 



j. Leaflets 5-7; buds short-pointed, brownish; nut with thick and 

 bony shell. Pignut Hickory, CAHYA GLABBA (p. 47). 



j. Leaflets 7— 11; buds long-pointed, yellow; nut with thin-walled shell. 



BiTTERNUT Hickory, CAB.TA COEDIFORMIS (p. 47). 

 d. Flowers not in catkins. 

 e.* Flowers sina'll. Usually greenish ; corolla inconspicuous or wanting. 

 f. Flowers appearing decidedly before the leaves (£/m). 

 g. Buds with rusty pubescence; bark aromatic; flowers nearly sessile; 

 fruit orbicular, not ciliate; leaves rough above. 



Slippery Elm, TTLMTIS FTTLVA (p. 5-2) • 

 g. Buds glabrous; inner bark not aromatic; flowers on slender drooping 

 pedicels; fruit ovate, ciliate; leaves smoothish above. 



White Elm, TJLMTTS AMERICANA (p. 52). 

 f. Flowers appearing with or after the leaves. 

 g. Flowers in dense heads, monoecious; leaves palmately lobed. 



Sycamore, PLATANTJS OCCIDENTALIS (p. 76). 

 g. Flowers not in dehse beads. 

 h. Leaves compound; trees thorny; fruit a large flat pod. 



Honey Locust, GLEDITSIA TBIACANTHOS (p. 82), 

 h. Leaves simple. 

 i. Yotmg bark green, aromatic; flowers dioecious. 



SASSAFRAS VABIIFOLnJM (p. 68). 

 i. Bark not aromatic. 

 j. Old bark remaining smooth, gray. 



Beech, FAGTTS GEANDIFOLIA (p. 50). 

 j. Old bark rough. 

 k. Bark with corky warts; leaves oblique at base. 



Hackberry, CELTIS OCCIDENTALIS (p. 53). 

 k. Bark furrowed, often divided into square plates, {"alligator hark") ; 

 leaves acute at base. Sour Gum, NYSSA STLVATICA (p. loi). 

 «. Flowers with conspicuous and usually showy corollas. 

 f . Flowers irregular (papilionaceous) ; fruit a pod, leguminosae, 

 g. Leaves simple, heart-shaped; flowers red-purple, 



Redbud, CERCIS canadensis (p. 82). 

 g. Leaves compound; flowers white; plant spiny. 



Black Locust, EOBINIA FSETJDACACIA (p. 84). 

 f. Flowers regular. 

 g. Petals brown-purple. Papaw, ASIMINA TRILOBA (p. 66). 



g. Petals greenish-yellow to cream color, 

 h. Sepals and petals five ; pistil single ; ovary five-celled ; leaves heart- 

 shaped. Basswood, TILIA AMERICANA (p. 93). 

 h. Sepals three; petals six or more; pistils many, cohering in a c6ne 



(.Magnolia family). 

 i. Leaves pointed. Cucumber Tree, MAGNOLIA ACTTMINATA (p, 65). 

 i. Leaves truncated above. 



Tulip Tree, LIBIODENDRON TTILIPIFEBA (p. 65), 

 g. Petals pink. Wild Crab, PYBUS COBONABIA (p. yy), 



g. Petals white (.Rosaceae). 

 h. Leaves compound. Mountain Ash, PTBTTS AMEBICANA (p. 77). 

 h. Leaves simple. 

 i. Ovary one-celled (Prunus), 

 3. Flowers racemose. 

 k. Leaves oblong, shiny, crenate-serrulate, the teeth incurved; lenticels 



