34a. Leaves serrulate, green beneath, acute; corolla globular 



Bilberry, Yaccinium membranacenm. 

 34b. Leaves entire, pale beneath, obtuse; corolla ovoid 



Bilberry, Yaecinnun oyalirolinm. 



PKDfTLACEAE, the Primrose Family 



Herbs, with alternate or opposite simple leaves and regular flow- 

 ers; petals more or less united; stamens attached one in front of 

 each petal; ovary 1-celled with 1 style. 



la. Leaves all basal; flowers on leafless stalks 2. 

 Ib. Stem-leaves present 5. 



2a. Flowers nodding, the petals reflexed (3 6 dm. high; flowers 

 showy r white or pink, in spring) 



Shooting Star, Dodecatheon meadia. 



2b. Flowers erect or spreading; petals not reflexed 3. 

 3a. Corolla not longer than the calyx; flowers small and in con- 

 spicuous (1 dm. high; flowers white or pink, spring) 



Androsaee, Androsace occidentals. 

 3b. Corolla conspicuous, much longer than the calyx (flowers pink 



or purple, summer) (Primrose) 4. 

 4a. Leaves white-mealy beneath (1 4 dm. high) 



Primrose, Prim n la farinosa. 

 4b. Leaves green beneath (2 dm. high or less) 



Primrose, Primula mistassinica. 



5a. All the stem-leaves in one whorl just below the flower-cluster 6. 

 5b. Stem-leaves several or many, scattered over the stem 7. 

 6a. Stem-leaves about 1 cm. long 3a. 



6b. Stem-leaves 5 10 cm. long Star Flower, Trientalis americana. 

 7a. Flowers red, blue, or white (summer) 8. 

 7b. Flowers yellow (summer) 9. 



Sa. Leaves opposite; flowers axillary (stems spreading, 1 4 



dm. long; flowers blue or red) 



Pimpernel, Anasrallis aryensis. 

 Sb. Leaves alternate; flowers racemose (1 4 dm. high; flowers 



minute, white) Water Pimpernel, Samolns floribnndns. 



&a. Stem creeping Moneywort, Lysimachia nnmmnlaria. 



9b. Stem erect (Loosestrife) 10. 



lOa. Flowers in dense spike-like racemes (3 S dm. high) 



Loosestrife Lysimachia thyrsiilora. 



lOb. Flowers axillary or racemose (3 9 dm. high) 11. 



lla. Corolla dotted or streaked with purple or brown; leaves punctate 



with dark spots 12. 

 lib. Corolla plain yellow; leaves not dark-dotted 14. 



12a. Flowers in racemes 13. 



12b. Flowers all axillary Loosestrife, Lysimachia qnadrifolia. 



