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A most striking feature however was the remarkable transition 
between flowers in bloom, and greened-out leaves and dead 
leaves and buds, which occurred about two thirds to three fourths 
of the height of the bushes from the ground. It was noticeably 
higher in the centers of large bushes and in wind-protected areas 
and lower in wind-swept and less protected areas. It corre- 
sponded remarkably to the general level of the snow which 
partly covered the bushes during the severe and unusually pro- 
longed cold weather of February, 1912. 
Fic. 2 A view in the Mud Lake Bog at the time of flowering, showing the 
dead buds at the tops of the bushes. The snow level was about 70 cm. Мау 9. 
1912. 
Observations had been made nearly every week all winter 
and before the severest cold weather the snow was 50 to 66 cm. 
(20-26 inches) deep in the Chamaedaphne association, varying 
according to the exposure to wind. АП during the very cold 
weather the depth of snow at First Sister Lake, west of Ann 
Arbor, Michigan, was more than 20 inches and in places reached 
heights of 75 to 90 cm. (30-35 inches) on the general level of drift. 
