128 Spring Flora of Ohio. 



fi'J. Leaves broad niul more or less cordate or ovate, serrulate, serrate, page 



or coarsely toothed ; trees with soft, white wood Pufiiilus. -J'.i 



ly. Leaves coarsely sinuate-toothed; fruit an acorn (J/im/is. :',:; 



t)o. Leaves serrate with coarse pointed teeth: ntits in a spiny 



involucre Cas/anea. :)■■', 



63. Leaves, etc., not as above (54 . 

 64. Leaves broad, cordate-ovate, serrate, usually lobed on young shoots, 

 rough, or smooth and shining above; wood hard, yellow- 

 ish Morns. ;l(i 



(A. Leaves broad, cordate, mucrouately-serrate ; the inner bark very 

 strong; flowers and woody cap.snles cymous ; the peduncle 



adnate to a large leaf-like bract I'iHa. 81 



<14. Leaves rhombic- ovate, acutish at each end, irregularly doubly- 

 serrate or obscurely 9-l;?-lobed, whitish beneath ; bark of 

 young trunks and limbs lacerate-laminate, whitish or 



ish or reddish tinged Hrlnla. -IJ 



()4. Leaves long, narrow, serrulate or serrate; trees or shrubs growing 

 especially along streams; pod 1-celled, seeds with silky 



down Sali.x . ?M 



64. Leaves, etc.. not as above (>'> . 



65. Leaves strongly straight-veined 68 . 



65. Veins from the midrib not prominently straight and parallel 

 as above (66 . 



65. Veins triple at base, somewhat irregularly reticulate Crltis. 36 



6(). Trees not at all thornj-; leaves broad and more or less cordate or 

 ovate, teeth small and somewhat regular, or sinuate-toothed 



or creuate PofiKlu.s. 2i> 



66. Trees not at all thorny; leaves much longer than broad, serrate or 



serrulate •. Prinins. 6S 



66. Trees more or less thorny 67 . 



67. Thorns conspicuous ; leaves round-ovate or more or less 



wedge-shaped CraUriiiis. 63 



67. Somewhat thorny by stunted branches ; leaves toothed, cut- 

 serrate or lobed Pyi us. 6'J 



6s. Twigs and leaves more or less spicy-aromatic ; bark somewhat lam- 

 inate or detaching in thin filmy layers; leaves ovate or ob- 

 long-ovate, coidatr (II- rounded at base Bclida. 32 



6,s. Not as above 6it . 



•I'.i. Leaver oblong- ovate, taper- pointed, distinctly and often 

 coarsely toothed; nuts sharplj- 3-sided, in a soft prickly 

 coriaceous involucre ; tree with close, smooth, ash-gray \>2iX\^.Fasius. 33 

 69. Leaves sharply, often doubly serrate ; fruit, etc., not as above 70 . 

 711. Large trees; bark deeply furrowed; leaves serrate, unequal at base; 

 the flowers 'preceding the leaves and winged fruit in fas- 

 cicles or racemes / 'hnns. :!5 



7(1. .Small trees; bark finely furrowed with narrow longitudinal divi- 

 sions ; fruit resembling that of hops Osliva. 31 



70. Small trees; bark smooth, light-gray or ash-colored: a nut at the 



base of each enlarged scale of the leafy catkin Carfiinns. 31 



