Agrostis exarata is a species of grass known by the common names spike bentgrass, spike bent, Pacific bentgrass, and spike redtop. It is native to western North America from Texas to the Aleutian Islands.
This is a common perennial grass reaching one to three feet in height with long, thin, flat leaves each with a ligule of 2–4 millimetres (0.079–0.157 in). The tuft inflorescence may be up to 30 centimetres (12 in) long and is usually dense with tiny spikelets. It reproduces mainly by seed, but it can also spread via rhizome. This bunchgrass occurs in many plant communities in varied climates. It is considered good forage for livestock.
- Calflora Database: Agrostis exarata (Spike redtop, spike bentgrass)
- Jepson Manual eFlora (TJM2) treatment of Agrostis exarata[permanent dead link]
- The Grass Manual on the Web: Treatment of Agrostis + Agrostis exarata
- USFS: Fire ecology of Agrostis exarata
- UC Photos gallery — Agrostis exarata
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