30 General Key to the Families 



V. HERACLEUM. L. 



i. H. lanatum. Michx. Cow Parsnip. 

 VI. LEPTOT^NIA. Nutt. 



i. L. multifida. Nutt. Cut-leaved Angelica. 



LII. CORKAGES. DOGWOOD FAMILY 



Shrubs or trees with bitter tonic bark; leaves opposite or alter- 

 nate, simple, usually entire, pinnately veined, without stipules; 

 flowers perfect, cymose or capitate, rarely solitary, with or with- 

 out an involucre, petals distinct, as many as the calyx-lobes and 

 alternate with them, inserted on the margin of the epigynous disk ; 

 fruit drupelets covered with the remains of the calyx. 



I. CORNUS. (Tourn.) L. 



1, C. canadensis. L. Bunchberry. 



2. C. stolonifera. Michx. Red-osier Dogwood. 



Subclass II. Metachlamydece 



ORDER XXVII. ERICALES 

 LIII. ERICACE-E. HEATH FAMILY 



A large family of shrubs and herbs; leaves simple, oblong or 

 linear, deciduous or evergreen; flowers racemose, corymbose or 

 solitary, regular, mostly perfect, without stipules, sometimes from 

 scaly buds; fruit a capsule, berry or drupe. 



SUBFAMILY PYROLOIDE^E 



TRIBE PYROLE^E 

 I. CHIMAPHILA. Pursh. 



1. C. umbellata. (L.) Nutt. Pipsissewa. 



2. C. Menziesii. Spreng. Spotted Prince's Pine. 

 II. MONESES. Salisb. 



i. M. uniflora. (L.) Gray. One-flowered Wintergreen. 

 III. PYROLA. (Tourn.) L. 



1. P. chlorantha. Sw. Green-flowered Wintergreen. 



2. P. secunda. L. One-sided Wintergreen. 



3. P. minor. L. Small Wintergreen. 



