John Lindley, Edwards's Botanical Register, Volume 16…
“ Leaves 4 or 5 inches long, cuneate, obtuse, scarcely truncate, tapering by degrees into the petiole, coarsely serrated, wavy, green beneath, reticulated, smooth, with a downy midrib. Heads of flowers oblong, obtuse; bracteæ downy. Calyx fulvous, silky, much shorter than the style. Style straight, ascending, never curved backwards. Stigma oblong, furrowed, smooth. ”
