42a. Mid-vein glandular above (shrubs 1 3 m. tall; flowers 

 white or pink) (Chokeberry) 43. 



42b. Mid-vein not glandular (shrubs or trees, 1 10 m. tall; flow- 

 ers white) (Juneberry) 44. 



43a. Leaves glabrous beneath Chokeberry, Pyrus melanocarpa. 



43b. Leaves tomentose beneath 



Chokeberry, Pyrus arbntifolia yar. atropurpurea. 



44a. Petals 1525 mm. long 45. 

 44b. Petals 5 12 mm. long 46. 



45a. Mature leaves glabrous Juneberry ; Amelanchier canadensis. 

 45b. Mature leaves pubescent beneath 



Juneberry,, Amelanchier canadensis var. botryapium. 



46a. Flowers in racemes 47. 



46b. Flowers solitary, or in small clusters of 2 4 



Juneberry, Amelanchier oligocarpa. 



47a. Leaves coarsely dentate, with about 1 tooth for each lateral vein 



Juneberry, Amelanchier spicata. 



47b. Leaves finely serrate, with about 2 3 teeth for each lateral vein 



Juneberry, Amelanchier oblongifolia. 



4Sa. Flowers yellow 49. 



48b. Flowers white, pink, purple, or rose, never yellow 63. 



49a. Plant with basal trifoliate leaves, resembling strawberry (1 3 

 dm. high; late spring) 



Barren Strawberry, IValdsteinia fragarioides. 



49b. Plants with leafy stems 50. 



50a. Flowers solitary in the axils of foliage leaves, on long 

 peduncles (trailing or creeping plants; flowers in late spring 

 and summer) 51. 



50b. Flowers in narrow terminal spike-like racemes (3 8 dm. 

 high ; summer) (Agrimony) 52. 



50c. Flowers in irregular or spreading clusters 55. 



51a. Leaflets 5 Five-finger, Potentilla canadensis, 



51b. Leaflets 725 Silver Weed, Potentilla anserina. 



52a. Principal leaflets more than 3 times (about 3!^) as long as 

 wide Agrimony, Agrimonia parviflora. 



52b. Principal leaflets less than 3 times (about 2J/>) as long as 

 wide 53. 



53a. Leaves nearly glabrous beneath, or with scattered spreading 

 hairs Agrimony, Agrimouia gryposepala. 



53b. Leaves softly pubescent beneath 54. 



54a. Leaves distinctly glandular beneath 



Agrimony, Agrimonia striata* 

 54b. Leaves not glandular beneath Agrimony, Agrimonia mollis. 



