02 Details of the phytoliths observed in each species

Avenella flexuosa

MSI Figure 1. Articulated fragments of silicified epidermal and subepidermal elements of Avenella flexuosa. Graphic scale: 20 microns.

MSI Figure 2. Unicellular phytoliths of Avenella flexuosa, originating from short, collapsed, boat-shaped cells, hairs and papillose elements, stings, polihedral bulliform elements, and long, elongated cells. Graphic scale: 20 microns.

Deschampsia airaeformis

MSI Figure 3. Articulated phytoliths found in epidermal fragments of Deschampsia airaeformis. Graphic scale = 20 microns.

MSI Figure 4. Unicellular phytoliths originating from short, boat-shaped cells of varying lengths, sharp, polyhedral elements of Deschampsia airaeformis. Graphic scale = 20 microns.

Deschampsia antartica

MSI Figure 5. Fragment of epidermis with different types of Deschampsia antartica phytoliths. Graphic scale = 20 microns.

MSI Figure 6. Unicellular epidermal and subepidermal phytoliths of Deschampsia antartica. Graphic scale = 20 microns.

Deschampsia argentea

MSI Figure 7. Unicellular and multicellular phytoliths of epidermal origin from Deschampsia argentea. Graphic scale = 20 microns.

Deschampsia berteroana

MSI Figure 8. Multi- and unicellular epidermal and subepidermal phytoliths of Deschampsia berteroana. Graphic scale = 20 microns.

Deschampsia cespitosa

MSI Figure 9. Unicellular phytoliths of epidermal origin from Deschampsia cespitosa. Graphic scale = 20 microns.

MSI Figure 10. Multicellular phytoliths of epidermal origin from Deschampsia cespitosa. Graphic scale = 20 microns.

Deschampsia cordillerarum

MSI Figure 11. Multicellular phytoliths of epidermal origin from Deschampsia cordillerarum. Graphic scale = 20 microns.

Deschampsia danthonioides

MSI Figure 12. Unicellular and multicellular phytoliths of epidermal origin from Deschampsia danthonioides. Graphic scale = 20 microns.

Deschampsia elongata

MSI Figure 13. Phytoliths unicellular and in some cases multicellular Deschampsia elongata. Graphic scale = 20 microns.

MSI Figure 14. Multicellular epidermal and subepidermal phytoliths of Deschampsia elongata. Graphic scale = 20 microns.

Deschampsia kingii

MSI Figure 15. Unicellular phytoliths of Deschampsia kingii. Graphic scale = 20 microns.

MSI Figure 16. Multicellular phytoliths of Deschampsia kingii. Graphic scale = 20 microns.

Deschampsia laxa

MSI Figure 17. Unicellular and multicellular phytoliths of epidermal origin from Deschampsia laxa. Graphic scale = 20 microns.

Vahlodea atropurpurea

MSI Figure 18. Multicellular and unicellular phytoliths of Vahlodea atropurpurea. Graphic scale = 20 microns.