and O. wallichianus; but not to be confused with the true Himalayan O. wallichianus q.v.). Widely clump to colony-forming, spreading to shortish slender rhizomes. Leaves to 30cm or more long by 4-6mm wide, fairly deep green, low-arching to semi-erect. Racemes somewhat shorter than leaves with moderately crowded white to purple-tinted flowers 5-7mm wide, late summer. Fruits dull bluish. Japan, in lowland and foothills woodland and scrub. Generally represented in cultivation by O.p. 'Nigrescens' (syn. 'Arabica') with almost black leaves, darker flowers and black fruit. Needs fairly bright light for the leaves to develop their blackest tone.