Sentence:  The calyx is composed of five linear spreading sepals J inch long and attached to the sides of the inferior ovary are four bracts, two of which, the anterior and posterior, remain abortive, whilst the two lateral ones develop into large rounded flattened discs (<WSD>peltae</WSD>) attached at the centre. 
Meaning of the word marked with <WSD> tags:  A flat apothecium with no rim.