Achnatherum calamagrostis 2 Moneval NE of Grenoble FR 150705 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achnatherum calamagrostis 3 Moneval NE of Grenoble FR 150705 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achnatherum calamagrostis 4 Lund Bot Garden 150903 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achnatherum calamagrostis 5 Lund Bot Garden 150903 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achnatherum calamagrostis 6 Lund Bot Garden 150903 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achnatherum nelsonii 8 Copenhagen Bot Garden 130611 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achnatherum calamagrostis 1 Moneval NE of Grenoble FR 150705 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achnatherum calamagrostis 10 Copenhagen Bot Garden 130807 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achnatherum calamagrostis 11 Copenhagen Bot Garden 130807 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achnatherum calamagrostis 12 Copenhagen Bot Garden 130807 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achnatherum calamagrostis 13 Copenhagen Bot Garden 130807 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achnatherum calamagrostis 14 Copenhagen Bot Garden 130807 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achnatherum calamagrostis 15 Copenhagen Bot Garden 130807 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achnatherum calamagrostis 16 Copenhagen Bot Garden 130807 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achnatherum calamagrostis 17 Copenhagen Bot Garden 130807 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achnatherum calamagrostis 18 Copenhagen Bot Garden 130807 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achnatherum calamagrostis 19 Copenhagen Bot Garden 130807 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achnatherum calamagrostis 7 Copenhagen Bot Garden 130807 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achnatherum calamagrostis 8 Copenhagen Bot Garden 130807 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achnatherum calamagrostis 9 Copenhagen Bot Garden 130807 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achnatherum nelsonii 1 Copenhagen Bot Garden 130611 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achnatherum nelsonii 2 Copenhagen Bot Garden 130611 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achnatherum nelsonii 3 Copenhagen Bot Garden 130611 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achnatherum nelsonii 4 Copenhagen Bot Garden 130611 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achnatherum nelsonii 5 Copenhagen Bot Garden 130611 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achnatherum nelsonii 6 Copenhagen Bot Garden 130611 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achnatherum nelsonii 7 Copenhagen Bot Garden 130611 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achnatherum speciosum 1 Santa Barbara Botanic Garden, CA 130411 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achnatherum speciosum 2 Santa Barbara Botanic Garden, CA 130411 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achnatherum speciosum 3 Santa Barbara Botanic Garden, CA 130411 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achnatherum speciosum 4 Santa Barbara Botanic Garden, CA 130411 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Achnatherum speciosum 5 Santa Barbara Botanic Garden, CA 130411 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).