My dear F.

Try & find out & read account of the fir-trees affected by some fungus & which produce upright shoots.— I want to know whether case is same with that common here with Silver fir. (A. pectinata?);² the branches produce huge solid hard knobs with very rugged bark; & from these knobs shoots arise which are quite upright, but afterwards produce horizontal branchlets— The leaves are produced on them precociously. Can this be case described by German?³

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