Boll A rounded seed vessel or pod of a plant, especially used with cotton and flax. A variant of bowl . Bumblebees Large, hairy social bees of the family Bombidae . Comb A double layer of wax cells. In man-made hives, these are built on a sheet of wax placed within a frame.
Brood comb is comb containing young of the bees.
The petals of a flower as a group. Cultivar A cultivar is a cultivated variety , a population of plants within in a species of plant. Each cultivar or variety is genetically different. Examples are 'Hass' avocado, 'Spear' wheat, 'Caliph' barrel medic. A species is a population that is genetically different from others and rarely interbreeds with other species.