Tufted Hairgrass, Tufted Hair-grass: Deschampsia cespitosa (Synonyms: Aira caespitosa, Aira cespitosa, Aira holciformis, Deschampsia beringensis, Deschampsia bottnica, Deschampsia caespitosa, Deschampsia caespitosa ssp. beringensis, Deschampsia caespitosa ssp. caespitosa, Deschampsia caespitosa ssp. glauca, Deschampsia caespitosa ssp. hociformis, Deschampsia caespitosa ssp. orientalis, Deschampsia caespitosa ssp. paramushirensis, Deschampsia caespitosa ssp. parviflora, Deschampsia caespitosa var. abbei, Deschampsia caespitosa var. alpicola, Deschampsia caespitosa var. arctica, Deschampsia caespitosa var. caespitosa, Deschampsia caespitosa var. glauca, Deschampsia caespitosa var. intercotidialis, Deschampsia caespitosa var. littoralis, Deschampsia caespitosa var. littoralis, Deschampsia caespitosa var. longiflora, Deschampsia caespitosa var. mackenzieana, Deschampsia caespitosa var. maritima, Deschampsia caespitosa var. parviflora, Deschampsia cespitosa ssp. beringensis, Deschampsia cespitosa ssp. bottnica, Deschampsia cespitosa ssp. cespitosa, Deschampsia cespitosa ssp. genuina, Deschampsia cespitosa ssp. glauca, Deschampsia cespitosa ssp. holciformis, Deschampsia cespitosa var. longiflora, Deschampsia cespitosa ssp. obensis, Deschampsia cespitosa ssp. orientalis, Deschampsia cespitosa ssp. paramushirenis, Deschampsia cespitosa ssp. parviflora, Deschampsia cespitosa var.arctica, Deschampsia cespitosa var. bottnica, Deschampsia cespitosa var. glauca, Deschampsia cespitosa var. intercotidalis, Deschampsia cespitosa var.littoralis, Deschampsia cespitosa var. longiflora, Deschampsia cespitosa var. mackenzieana, Deschampsia cespitosa var. maritima, Deschampsia cespitosa var. pallida, Deschampsia cespitosa var. parviflora, Deschampsia glauca, Deschampsia holciformis, Deschampsia mackenzieana, Deschampsia obensis, Deschampsia paramushirensis, Deschampsia pumila, Deschampsia sukatschewii)
Annual Hairgrass: Deschampsia danthonioides (Synonyms: Aira danthonioides, Deschampsia calycina, Deschampsia danthonioides var. gracilis)
Slender Hairgrass, Slender Hair-grass: Deschampsia elongata (Synonym: Aira elongata)