This is an irregular feature - both in frequency and oddness - dedicated to a word I came across that I have never previously used.
dasyphyllous (dah-SIFF-ih-luss) adj. Relating to botany, this word is used to described a plant with hairy or downy leaves.
The word dasyphyllous probably received more exposure from its inclusion in the finals of the 2006 Scripps National Spelling Bee than in its entire history. Canadian contestant Finola Hackett, from Tofield, Alberta, correctly spelled this unusual word.