Although most of its spread in North America probably relates to the initial introductions from ship ballast etc., some populations may have spread from intentional introductions for herbal use of the plant, from home garden plantings, or from wildflower seed mixtures that often contain purple loosestrife seeds (Hanna, 1989;
(most of its spread in North America; probably relates ballast etc.; to the initial introductions from ship) (some populations; may have spread; from intentional introductions for herbal use of the plant, from home garden plantings, or from wildflower seed mixtures) (wildflower seed mixtures; contain; purple loosestrife seeds; T:often)
most of its spread in North America some populations wildflower seed mixtures
probably relates ballast etc. may have spread contain
to the initial introductions from ship
from intentional introductions for herbal use of the plant, from home garden plantings, or from wildflower seed mixtures
purple loosestrife seeds T:often