Poaceae

Perianth segments 0–3, usually 2; flowers grouped into a characteristic spikelet (Fig. 48) Poaceae

Spikelets unisexual, male and female markedly different and in different inflorescences; plants monoecious or dioecious

Female flowers not arranged in a globular head

Female flowers not surrounded by a bony utricle. Plants dioecious

Leaves crowded near the base of the plant, at least 1 m long. Inflorescence up to 1 m long, drooping Cortaderia

Leaves distributed along the upright stems. Inflorescence pyramidal, erect