ANALYTICAL KEY li 



3. Calyx tube tapering^ lobes slender, awl-shaped. 



Lush Honeysuckle, BIERVILLA LONICERA (p. 117). 

 j. Calyx tube not tapering, lobes minute. 



Fly Honeysuckle, LONICERA CANADENSIS (p. 117). 

 d. Branches and leaves not opposite. 

 0. Flowers monoecious or dioecious, one or both sorts in catkins. 

 f. Plants with resinous-dotted, fragrant leaves (Myrica). 

 g". Leaves entire or slightly toothed. 



Bayberry, myrica CAROLINENSIS (p. 45). 

 g. Leaves pinnatifid. Sweet Fern, MYRICA ASPLENIFOLIA (p. 45). 



f. Plants without resinous-dotted, fragrant leaves. 

 g. Flowers appearing decidedly before the leaves. 

 h. Flowers dioecious. 

 1. Winter buds with one scale; catkin scales entire or nearly so 

 {Pussy willow). 

 j. Capsules glabrous. SALIX CORD ATA, etc. (p. 43). 



j. Capsules pubescent. SALIX DISCOLOR, etc. (p. 43). 



i. Winter buds with several scales; catkin scales lacerate. 



Aspen, POPTJLTTS TREMTJLOIDES (p. 44). 

 h. Flowers monoecious. 

 i. Both sorts of flowers conspicuously in catkins {Alder) » 

 j. Leaves doubly serrate, rounded at base, usually downy. 



Hoary Alder, ALNTJS INCANA (p. 49). 

 j. Leaves regularly serrate, acute at base, usually smooth. 



Smooth Alder, ALNTTS RUGOSA (p. 49). 

 i. Only the staminate flowers conspicuously in catkins. 



Hazel, CORYLTJS AMERICANA (p. 47). 

 g. Flowers appearing with or after the leaves. 

 h. Both sorts of flowers conspicuously in catkins. 

 i. Flowers dioecious. 



Long-leaved Willow, SALIX LONGIFOLIA (p. 43). 

 i. Flowers monoecious (.Birch), 

 j. Bark dull white, not readily exfoliating; leaves triangular, long 

 taper-pointed. Gray Birch, BETULA POPTILIFOLIA (p. 49). 



ji Bark creamy white, exfoliating readily; leaves not triangular nor 

 taper-pointed. Paper Birch, BETTJLA ALBA PAPYRIFERA (p. 49). 

 h. Only the staminate flowers conspicuously in catkins. 

 i. Bark close, smooth and gray; stems angular. 



Water Beech, CARPINUS CAROLINIAWA (p. 48). 

 i* Bark rough below, smooth and brown above. 



Hop Hornbeam, OSTRYA VIRGINIANA (p. 47). 

 o. Flowers not in catkins. 

 f. Only one perianth whorl present; flowers appearing before or with the 

 leaves (p. 12). 

 g. Bark leathery, not aromatic. 



Leatherwood, DIRCA PALTTSTRIS (p. 96). 

 g. Bark aromatic. 

 h. Plant prickly. 



Prickly Ash, ZANTHOXYLTTM AMERICANTTM (p. 87). 

 h. Plant not prickly. 

 I. Flowers conspicuously stalked. SASSAFRAS VARIIFOLIXJM (p. 68). 

 i. Flowers in almost sessile clusters. 



Spice Bush, BENZOIN AESTIVALE (p. 68). 



