Typha angustifolia (Narrow-Leaved Cattail) now has a boreal, circumpolar range in Eurasia and North America, but it was rare or absent in the earliest floras for North America, suggesting introduced status. In contrast, T. latifolia (Wide-Leaved Cattail) was widespread in across Europe and North America. Typha angustifolia or 'T. angustifolia-Sparganium' pollen have been reported from coastal marsh sediments, more than 350 years old, from Long Island, Piermont Marsh the Hudson River, and New Jersey. Consequently, Typha angustifolia is considered cryptogenic on the Atlantic Coast. However, it was slow to reach the interior of North America, reaching Lake Ontario in 1880, the San Francisco Bay Delta by 1909, and the Columbia River estuary by 1980. Hybrids of T. angustifolia and T. latifolia, known as T. Xglauca, are widespread and aggressive invaders. Adult plants are 1000-3000 m tall, with narrow brown flower spikes, producing fluffy windblown seeds. Narrow-Leaved Cattails tolerate salinities as high as 18 PSU, higher than than for T. latifolia (5-10 PSU). Cattails as a group are aggressive competitors, and are stimulated by high nutrient inputs.