Cattails (Typha spp., family Typhaceae) are tall, emergent wetland plants commonly found along pond margins, marshes, and bogs where soils remain waterlogged throughout the growing season. Their upright stems can reach over two meters in height, making them highly visible indicators of freshwater habitats.

The long, basal, ribbon-like leaves are pale green and structurally adapted to aquatic environments. In cross-section, they contain extensive aerenchyma large interconnected air channels that provide buoyancy and facilitate gas exchange. This spongy internal structure also accounts for their historical use in weaving (mats, baskets, rope) and as absorbent packing or insulation material.

Cattails are monoecious and wind-pollinated. Male and female flowers develop in separate spikes on the same stem, with the male spike positioned above the female. After pollen release, the male portion withers, leaving a bare stem segment above the characteristic brown, cylindrical female fruiting spike. The mature fruit consists of small, tufted nutlets that disperse efficiently by wind.

In autofluorescence microscopy, cattail leaf tissue exhibits intrinsic fluorescence from lignified vascular bundles and cell wall components, allowing visualization of internal leaf architecture without exogenous staining.