IV. CRUCIFERÆ.
11. Cardamine pratensis, L., var. angustifolia.—B.
Island near the centre of Boyd Lake. Limestone Island, in Nicholson Lake. Fort Churchill.
12. Arabis lyrata, L.—W.
North shore of Lake Athabasca.
13. Arabis humifusa, var. pubescens, Wat.—W.
North-west angle of Lake Athabasca. Esker, near the Narrows of Daly Lake. This species had not previously been found west of Hudson Bay.
14. Barbarea vulgaris, R. Br.—W.
Cracking Stone Point, north shore of Lake Athabasca. Red Hill, on the west shore of Hinde Lake.
15. Sisymbrium humile, C. A. Meyer.—W.
Fort Chippewyan, Lake Athabasca.
16. Cardamine digitata, Rich.—B.
Loudon Rapid, above Forks of Telzoa River. Mouth of Chesterfield Inlet. Not found elsewhere since it was collected by Sir John Richardson near the mouth of the Coppermine River.
17. Draba hirta, L.—B.
Limestone Island, Nicholson Lake. Loudon Rapids, above the Forks of Telzoa River. Also at Ashe Inlet, on the north shore of Hudson Strait.
18. Draba incana, L.—B.
Loudon Rapids, above the Forks of Telzoa River. Fort Churchill, on the west coast of Hudson Bay.
19. Draba nemorosa, L., var. leiocarpa, Lindb.—W.
Fond du Lac, Lake Athabasca.
20. Draba stellata, Jacq.—B.
North-west shore of Tobaunt Lake.
21. Cochlearia officinalis, L.—B.
Mouth of Chesterfield Inlet.
22. Eutrema Edwardsii, R. Br.—B.
North-west shore of Tobaunt Lake.
23. Nasturtium palustre, D. C.—W.
Fond du Lac, Lake Athabasca.