petrophila

from The Century Dictionary.

• noun A large genus of apetalous Australian shrubs of the order Proteaceæ and the tribe Proteæ, distinguished by its perfect flowers with four anthers sessile on the four calyx-lobes, and a filiform style dilated and spindle-shaped above, and by their growth in dense heads involucrate with colored bracts, becoming in fruit cones with persistent hardened scales, each inclosing a compressed nut containing a single winged or hairy seed.
• A superfamily of basommatophorous pulmonate gastropods, including the Siphonariidæ and Gadiniidæ. They have a patelliform shell, and live attached to rooks, mostly between tide-marks.