Northern Prairie Wildlife Research Center
Redtop Panicum (Panicum rigidulum)
- Family: Grass (Poaceae)
- Flowering: July-October.
- Field Marks: This Panicum differs by its very tiny straight spikelets, its smooth stems and leaves, and its leaves at least 1/4 inch broad.
- Habitat: Wet meadows, wet prairies, damp woods, in roadside ditches, along streams, around ponds and lakes.
- Habit: Tufted perennial herbs.
- Stems: Erect, branched, smooth, up to 3 feet tall.
- Leaves: Long and narrow, rough, up to 15 inches long, 1/4-1/2 inch broad.
- Flowers: One per spikelet, with many spikelets forming a panicle up to 1 1/2 feet long; spikelets 1/12 inch long, pointed at the tip, smooth.
- Stamens: 3.
- Pistils: Ovary superior; styles 3.
- Grains: 1/20 inch long.
- Notes: This species used to be known as P. agrostoides.
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