CCIII Orchidaceae Author D. M. Moore (ed.) text 1980 Cambridge University Press Camebridge Flora Europaea, Vol 5: Alismataceae to Orchidaceae 325 350 book chapter 10.5281/zenodo.215522 e75af61c-ea0f-4791-94c6-806a39e338ea 052120108X 215522 20 . O . provincialis Balbis , Mém . Acad . Sei . (Turin) 1805-1808: 20 (1806) . Tubers subglobose or ovoid . Stem 15-35 cm, erect, with 2-5 leaves at the base and sheaths above . Leaves lanceolate or oblong-lanceolate . Spike cylindrical . Bracts lanceolate, 1 - to 3-veined, at least as long as ovary . Flowers pale yellow, or white with deep yellow labellum, with slight odour . Outer perianth-segments 9-11 mm, ovate-oblong, obtuse, the 2 lateral deflexed, the median erect; inner smaller, obliquely oblong . Labellum suborbicular, 3-lobed; lateral lobes rounded; middle lobe small, orbicular-truncate, scarcely longer than the lateral . Spur cylindrical, patent, as long as or longer than ovary . 2n = 42 . 5 . Europe . A 1 Bu Co Cr Ga Gr He Hs It Ju Rs (K) Sa Si .