Haastia sinclairii is a species of small flowering plant in the South Island of New Zealand.

[2][1][3][4] A small, green plant with a single stem and leaves that seem to surround the stem in slightly revolving circles, with a white flower that can have orange or yellow petals on the outer rim.

Allan (1961)[6] described the species this way:Plant sparingly to much branched, decumbent to suberect.

Lvs ± patent, up to 3·5 × 1·5 cm., oblong-obovate, subacute to rounded at apex, densely clad in whitish subappressed tomentum, except on adaxial surface of appressed base, upper part slightly thickened, somewhat rugose; veins 5-10, anastomosing above.

narrow-oblanceolate, subacuminate, pilose on abaxial surface, c. 1 cm.