John Sims, Curtis's Botanical Magazine, Volume XIX…
“ Common Flower solitary, globose, sessile. Calcine Scales ovate-acuminate, very woolly except the margin, compactly imbricate, forming a globose cone fluffed with a fine white cottony substance. Corolla one- petaled, tubed: tube longer than the limb. which is four-cleft, hairy, tortuose. Anthers linear, 2-lobed sessile. Style ex- serted, club-shaped. Stigma conical, acute ”
