All 5 Uses

tundra
in
Sea Wolf
(Auto-generated)

With the exception of our little cove, the other beaches sloped gently back for a distance of half-a-mile or so, into what I might call rocky meadows, with here and there patches of moss and tundra grass.†
Chpt 29
Tundra grass was impracticable.†
Chpt 30 *
"Let us gather tundra grass and thatch the roof," Maud said.†
Chpt 30
"I think the tundra grass will make just as good a roof," she said.†
Chpt 30
I think tundra grass, will do, after all.†
Chpt 30

Definitions:

(1) (tundra)
a vast treeless plain in the northern arctic regions where the subsoil is always frozen (between the ice cap and the tree line)

More rarely, tundra can refer to alpine tundra (similar areas found elsewhere at high elevation).
(2) (meaning too rare to warrant focus)
Less commonly, Tundra can refer to a model of a Toyota truck.