False Hellebore (Veratrum viride)

Height: 0.7 to 2 meters (2.3 to 6.6 feet tall)
Flower Color: Yellow, green, brown 
Flower Season: May-Aug, peak flowering June-July
Sun: Prefers partial shade, as direct sun can scorch leaves. 
Soil: Moist, well-drained soil that is slightly acidic to neutral - rich & loamy. Often found in wet, natural environments like swamps, wet meadows, and open forests. 
Pollinators: Bees, butterflies, flies, moths