Achnatherum calamagrostis

aka Stipa calamagrostis

Common name: Spear grass
Description: cool season; clump forming
Foliage - grey-green; narrow; 50-70 cm (20-28") tall
Flowers - June-July; 80-100 cm (32-40") tall
Conditions: full sun/part shade; moist fertile soil; tolerates poor soil with ample water
Coldest zone: 5

[more info]   

Achnatherum brachytricha

Korean feather reed grass

Listed as Stipa brachytricha

Achnatherum hymenoides

Common name: Indian Ricegrass
Description: cool season; clump forming
Foliage - grey-green; narrow; 50-70 cm (20-28") tall
Flowers - June-July; 80-100 cm (32-40") tall
Conditions: full sun/part shade; moist fertile soil; tolerates poor soil with ample water
Zone: 3-9

[more info]