--42.

40b. Bushy trees or shrubs, with thorns or stiff thorn-like
branches, and with flowers generally 1.5-2.5 cm. across --41.

41a. Flowers pink, very fragrant =Wild Crab, Pyrus coronaria.=

41b. Flowers white (Hawthorn, the genus Crataegus). Several species of
this genus occur in the state, for the identification of which the
Manual must be used.

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; flowers
white) (Juneberry) --44.

43a. Leaves glabrous beneath =Chokeberry, Pyrus melanocarpa.=

43b. Leaves tomentose beneath
=Chokeberry, Pyrus arbutifolia var. atropurpurea.=

44a. Petals 15-25 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.=

48a. 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, Waldsteinia 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 7-25 =Silver Weed, Potentilla anserina.=

52a. Principal leaflets more than 3 times (about 3-1/2) as long as
wide =Agrimony, Agrimonia parviflora.=

52b. Princip