Julia Wilmotte Henshaw (8 August 1869 – 19 November 1937)[a] was a Canadian botanist, geographer, writer, and political activist who also served with the Red Cross in World War I.

[2] She is sometimes erroneously credited with the discovery of the moccasin flower (also pink lady's slipper) (Cypripedium acaule),[1][2] which had been known to science since 1789 and known from the Canadian Rocky Mountains since at least 1897, due to a misunderstanding of her statement "The Pink Lady's Slipper is so extremely rare in the Rocky Mountains that I regard my discovery of it in the year 1903 as the crowning triumph of my botanical work in that region.

[1] Henshaw travelled to France near the beginning of World War I, and returned to give speeches in favour of conscription and to raise money for ambulance services there.

[1] Beginning in 1915, she served in the Royal Army Medical Corps as an ambulance driver as part of the British Red Cross Society.

For her bravery she was awarded the Croix de Guerre with a Gold Star for "evacuating and recuperating inhabitants under shell fire and aerial bombarding with a devotion and courage worthy of the highest praise.