32 General Key to the Families 



XIV. CASSIOPE. D. Don. 



1. C. Mertensiana. (Bong.) Don. White Heath. 



2. C. tetragona. Don. Four-angled Heath. 

 XV. GAULTHERIA. (Kalm.) L. 



1. G. ovatifolia. Gray. Red-berried Gaultheria. 



2. G. humifusa. (Graham.) Rydb. Creeping Gaul- 



theria. 



TRIBE ARBUTE^ 



XVI. ARCTOSTAPHYLOS. Adans. 



1. A. Uva-ursi. (L.) Spreng. Red Bearbcrry. 



2. A. alpina. (L.) Spreng. Alpine Bearberry. 



3. A. tomentosa. Dougl. Manzanita. 



SUBFAMILY VACCINOIDE^ 



XVII. VACCINUIUM. L. 



1. V. ovali folium. Sm. Oval-leaved Blueberry. 



2. V. membranaceum. Dougl. Black Blueberry. 



3. V. caespitosum. Michx. Dwarf Bilberry. 



4. V. Vitis-Idsea. L. Mountain Bilberry. 



5. V. erythrococcum. Michx. Alpine Bilberry. 



6. V. Oxycoccus. L. Small Cranberry. 



ORDER XXVIII. PRIMULALES 

 LIV. PRIMULACE^. PRIMROSE FAMILY 



Herbs; leaves simple, opposite or alternate, basal or whorled on 

 the stem; flowers racemose or verticillate, sometimes axillary, reg- 

 ular, perfect, calyx free from the ovary, the stamens as many as 

 the lobes of the gamopetalous corolla ; fruit a capsule, dehiscent. 



I. PRIMULA. L. 



1. P. farinosa. L. Bird's Eye Primrose. 



2. P. Maccalliana. Weigand. Dwarf Canada Primrose. 

 II. ANDROSACE. (Tourn.) L. 



1. A. chamsejasme. Sweet Androsace. 



2. A. septentrionalis. L. Alpine Androsace. 



3. A. diffusa. Small. Spreading Androsace, 



