Haastia sinclairii is a species of small flowering plant in the South Island of New Zealand.
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. Prostrate.
Allan (1961) described the species this way:<blockquote>Plant sparingly to much branched, decumbent to suberect. Branchlets up to c. 30 cm. long, 4-6 mm. diam. Lvs ñ patent, up to 3÷5 à1÷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. Capitula c. 3 cm. diam.; receptacle 5-6 mm. diam. Phyll. narrow-oblanceolate, subacuminate, pilose on abaxial surface, c. 1 cm. long. Achenes c. 2 mm. long, narrow-linear. Pappus up to 1 cm. long.</blockquote>
Its known range is in the South Island of New Zealand.
Alpine and subalpine habitats. Scree fields, in particular.
Haastia sinclairii contains the following varieties:
It is in a clade together with Haastia recurva. The genus was named after Julius von Haast.