Based on a study of stable isotope signatures found in its teeth and bones, which can help tell us what an animal ate, it looks like Castoroides mostly ate freshwater plants, like water lilies, pondweeds, and sedges.
Nor is this all, for the giant saxifrage also is growing on some of the knob rock islets, firmly anchored and displaying their broad, round, umbrella-like leaves in showy groups by themselves, or above the sedge tufts.
I took her across water so shoal we had to pole through it; under overhanging banks and through dense stiff sedge, when often a plainly better channel swung a few feet away in another direction.
Insects now enrich the air, frogs pipe cheerily in the shallows, soon followed by the ouzel, which is the first bird to visit a glacier lake, as the sedge is the first of plants.
The alpine spiraea grows here also and blossoms profusely with potentilla, erigeron, eriogonum, pentstemon, solidago, and an interesting species of onion, and four or five species of grasses and sedges.
And then there was the bed, apparently lined with ura sedge from Northeast China, which the locals stuffed into their shoes to stay warm in the cold climate.
Next, Camus, reverend sire, went footing slow, His mantle hairy, and his bonnet sedge, In wrought with figures dim, and on the edge Like to that sanguine flower inscribed with woe.
Columbine grows on the drier margins with tall larkspurs and lupines waist-deep in grasses and sedges; several species of castilleia also make a bright show in beds of blue and white violets and daisies.
About sundown saw a flock of dun grayish sparrows going to roost in crevices of a crag above the big snow-field. Charming little mountaineers! Found a species of sedge in flower within eight or ten feet of a snow-bank.
Some of the sedges and willow boughs dip into the current, and just outside of the close ranks of trees there is a sunny flat of washed gravelly sand which seems to have been deposited by some ancient flood.