Examples from the Web for springwood
The annual rings are variable in width, and the proportionate amounts of springwood and summerwood also vary.
It is not easy to note a difference between the springwood and that which grows later.
In some woods the largest pores are in the springwood only and therefore run in rings.
The wood is light, soft, not strong; annual rings are moderately wide, and are largely composed of springwood.
There are many pores, however, and those in the springwood are arranged in bands.