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

invasive himalayan impatiens balsam glandulifera plant bloom 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 biodiversity eliminates gatecrasher herbicides mechanically flower bushes calamity disaster biomass insect