The forest nursery : collection of tree seeds and propagation ofseedlings . a b Fig. o.—Red Pine: o, Open mature eone; \), leaf bundle: c. u[)i)eraud lower sides of detached oonescales Avith seeds. (Natural size.) appear to be ripe; in fact, cones with ripe seeds may appear quitegreen externally (see ligs. 1, 3, -i, 6, 7). The ripeness of seeds in 50 THE FOREST NUESERY. cones of immature appearance can be quickly determined by cuttingthrouo-h the cones at various angles with a sharp knife. It the seeas

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