purple aster flower in namche bazaar, everest base camp trek, nepal

nepal asia himalayas himalaya everest base camp ebc trek trekking expedition journey sagarmatha khumbu farrer saint gallen tibetan blossom china swiss farrers aster hispidus botanic alpinus petal farreri tibet bloom arboretum tataricus asian spring tripolium amellus nature st asteraceae purple asterinae lautureanus wildflower natural flora plant erigeron botany flowerhead botanical flower