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Needle and Thread (Hesperostipa comata (Trin. & Rupr.) Barkworth)

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Range - Expand

LegendColor
Native
Expanded
Native or Not Present
Native or Expanded
Expanded or Not Present

This tentative map is based on our own research. It may have limited data on Canada and/or Mexico, and there is some subjectivity in our assignment of plants as introduced vs. expanded. Read more in this blog post.

This widely-distributed grass is native to the arid to semiarid west, where it occurs in a wide variety of habitats. Seed is sold commercially, and used for rehabilitation of degraded sites, but it is not widely planted in the east. It has expanded eastward, but most reports are from Wisconsin, with only scattered, isolated reports farther east. We mark these expanded because most of the expansion is adjacent to the native range, but some of the eastern populations could perhaps be marked introduced.