Sentence:  Now that she had rested and had fed from the luncheon tray Mrs. Broome had just removed, she had reverted to her normal gaiety. She looked cool in a grey tailored cotton dress with a terracotta scarf and shoes and her hair a black <WSD>silk</WSD> helmet. 
Meaning of the word marked with <WSD> tags:  Anything which resembles silk, such as the filiform styles of the female flower of maize, or the seed covering of bombaxes.