Drosera linearis
l 
Linear-Leaved Sundew

Early Fruit Cut Open

Greenbush Bog, 20 km West of Hudson Bay, SK on Highway #3
23-July-2019

Note the seeds are less than 1 mm long.

Flora of North America states that D. rotundifolia is found on sphagnum hummocks, D. anglica is found more often around bases of hummocks and on fen margins, and D. linearis is found on open marl.

Linearis: Answers to key questions in Budd's Flora and Flora of Alberta leading to this species. 

leaf blades linear; NOT [leaf blades almost round or broader than long], NOT [leaf blades spatulate or oblanceolate]

flowers 1-8; NOT [flowers 1-12] (from species descriptions in Flora of North America)

seeds 0.5-0.8 mm long; NOT [seeds 1.0-1.5 mm long]