himalayan balsam invasive impatiens glandulifera bloom flower blossom detail, expansive species dangerous plants asia

himalayan impatiens balsam glandulifera bloom invasive ornamental jewelweed flowers kiss mountain blossom expansive leaf species pink purple detail touching closeup dangerous himalayas plants leaves fruits intruder sachalinensis achenes saw neophyte asia reduces green wild rhizome wildflower collect honey biodiversity eliminates gatecrasher herbicides mechanically flower bushes calamity disaster biomass insect