leaf margins, and the petioles sport numerous long simple hairs. On the smaller leaves the hairs are notably dense in covering. The fruiting heads develop on peduncles. A peduncle bears 25 to 50 trilobed bracts, arranged helically, and each bract is paired with a fruiting head. Fruiting heads are long and wide, with an elliptical profile. Development of the lobes varies notably: central lobes are long while side lobes are . The bases of the slightly woody bracts are cupped where they attach to the peduncle, and the lobe tips are obtuse or rounded. The surface is ribbed irregularly and both upper and lower surfaces have sporadic simple hairs. The fruits are long and have an ovate to elliptical shape with rounded base and pointed tip. The sides are expanded into a narrow flange that is notably thinner than the body of the fruit. At the tip of the fruit are two simple styles. B. leopoldae flowering heads are long and wide and are composed of between 30 and 40 individual flowers. The flowers have a triangular primary bract, elliptical secondary bracts, stamens, and occasional hairs along the margins. The anthers each have two pollen sacs which contain both pollen grains and orbicule grains. The pollen grains each have three circular pores and a scabrate outer surface to the exine. The surface also has spines and granular nodes that are grouped into rows on ridges of the exine. References External links † Ypresian plants of North America Extinct flora of North America † † Paleontology in Washington (state) Paleogene British Columbia Paleontology in British Columbia Klondike Mountain Formation Fossil taxa described in 1987 † Allenby Formation Tranquille Formation Coldwater Beds