Helenium autumnale 'Sneezeweed'

Helenium autumnale, also known as sneezeweed is a perennial wildflower in the daisy family (Asteraceae). It is native to North America and typically grows to be about 2-4 feet tall. The plant produces yellow daisy-like flowers in the late summer and fall. Each flower head is about 1-1.5 inches wide and has a central disk of small, tubular flowers surrounded by a ring of larger, ray flowers. The leaves are lance-shaped and dark green.

It prefers wet to medium soils with moderate to high fertility. It can tolerate a wide range of soil types, including clay, loam, and sandy soils. The plant is also tolerant of a wide range of pH levels, from acidic to alkaline.

In terms of sunlight, Helenium autumnale prefers full sun to light shade. It is tolerant of some shade, but it will produce the most flowers and have the best growth in full sun. It can also tolerate drought conditions once established. 

Historically, the plant was used by Native American tribes to treat a variety of ailments, including colds, fevers, and headaches. The plant's common name "sneezeweed" comes from the practice of drying the plant's leaves and flowers and using them as a snuff to induce sneezing as a treatment for colds and respiratory issues.