Tuber formation on a fir, Grindelwald, Bernese Oberland region, canton of Bern, Switzerland, Europe

abies bern bernese botany bulb bulbs canton conifer conifers day daylight daytime during europe european exterior exteriors fir fir firs flora formation grindelwald nature nobody oberland of on outdoor photo photos plant plants region shot shots swiss switzerland the tree tree trees trees trunk trunks tuber tuber tubercule tubercules tubers