Description from Flora of China
Euphrasia bilineata Ohwi; E. exilis Ohwi; E. filicaulisY. Kimura; E. masamuneanaOhwi.
Perennials, to 29 cm tall, hairs eglandular. Stems cespitose, slender, prostrate, or prostrate at base and apically ascending to suberect, simple or branched, entirely pubescent or pubescent along 2 lines, or basally entirely pubescent and apically pubescent along 2 lines. Leaves ovate, ovate-orbicular, or obovate-orbicular, 3-8.5 X 2-5 mm, glabrous or nearly so, base rounded to broadly cuneate, margin acutely to obtusely 1-3(or 4)-toothed on each side, apex obtuse to rounded. Spikes terminal; bracts usually wider than leaves, glabrous. Pedicel 0.5-7 mm. Calyx 3.5-5 mm, glabrous or sparsely hispid along veins and margin; lobes as long as tube, oblong-lanceolate, apex obtuse. Corolla white, yellow, or light yellow with purple spots and venation, upper side 6-11 mm. Anther locules with barbate hairs along slit after dehiscence. Capsule conspicuously shorter than calyx, hirsute. Fl. Feb-Nov.
Euphrasia matsudae is a common and variable species, particularly in habit, leaf margin (number of teeth), indumentum of stems, and pedicel length.
* Subalpine and alpine zones, forests, forest edges, steep slopes; 2000-3000 m. Taiwan.