8s 



lla. Leaf-blades mostly shorter than their petioles, thick and firm 



Shin -leaf, Pyrola chlorantha. 

 lib. Leaf-blades thin, usually longer than their petioles 



Shin-leaf, Pyrola elliptica. 



12a. Petals nearly or quite separate from each other 13. 

 12b. Petals united into a gamopetalous corolla, the tube of which 

 is as long as or longer than the lobes 18. 



13a. Leaves opposite or whorled; stems herbaceous or nearly so 



(summer) 14. 

 13b. Leaves alternate; stems shrubby (early summer) 16. 



14a. Flowers solitary; leaves broadly ovate to nearly circular 

 (1 dm. high; flower white) 



One-flowered Wintergreen, Moneses nniflora, 



14b. Flowers in clusters; leaves narrow (stems trailing, 1 3 

 dm. high; flowers white or pinkish) 15. 



15a. Leaves broadest above the middle, green 



Prince's Pine, Chimaphila umbellata. 

 15b. Leaves broadest below the middle, spotted with white 



Spotted Wintergreen, Chimaphila maculata. 



16a. Leaves 2 5 cm. long, densely woolly beneath (5 10 dm. 

 high; flowers white) Labrador Tea, Ledum groenlandicum. 



16b. Leaves 1 2 cm. long, pale beneath but not wholly (creep- 

 ing; flowers pink) (Cranberry) 17. 



17a. Leaves acute Cranberry, Yaccinium oxycoccos. 



17b. Leaves obtuse Cranberry, Yaccinium macrocarpon. 



18a. Leaves opposite or whorled; corolla saucer-shape (shrubs 



3 8 dm. high; flowers purple, summer) 19. 

 18b. Leaves alternate; corolla bell-shape or salver-form 20. 



19a. Branches and twigs cylindrical, not angled 



Sheep Laurel, Kalmia angustifolia. 

 19b. Branches and twigs with 2 sharp angles 



Swamp Laurel, Kalmia polifolia. 



20a. Plants prostrate, or with a few ascending branches only 



(flowers white or pink) 21. 

 20b. Plants erect or ascending 23. 



21a. Flowers 10 20 mm. long, very fragrant (early spring) 



Trailing- Arbutus, Epigaea repens. 



21b. Flowers 4 5 mm. long (late spring) 22. 



22a. Leaves spatulate, broadest beyond the middle 



Bearberry, Arctostaphylos uYa-ursi. 

 22b. Leaves oval, broadest at the middle 



Snowberry, Chiogenes hispidula. 



