Sentence:  The numerous structures lying on the floor of the ovarian cavity have been interpreted in the past as carpels (Stapf, 1894; Baehni, 1937, 1938) or as female flowers (Hutchinson, 1926) while the <WSD>urceole</WSD> has been regarded as an overdeveloped "disc" or receptacle (Stapf, l.e.), a receptacle resembling a thick corolla (Hutchinson, l.e) and corolla (Baehni, l.c). 
Meaning of the word marked with <WSD> tags:  A disc in the center of a flower, often resembling a thickening of the corolla, which holds the carpels.