this so-called pollen presenter between species. The pollen presenter may be cylindric, oval, or conic in shape, either or not split in two lobes near the tip or oblique. The very tip has a groove that functions as the stigma that is centrally or oblique oriented. The finely powdery ovary is long, and gradually merges into the style base. It consists of one carpel and contains a single pendulous ovule. At the base of the ovary are four linear or awl-shaped scales of long that secrete a copious amount of nectar. The indehiscent fruit consists of one cavity, containing one oval to globe-shaped seed of long, with a broad indent where it was attached, hairless or covered with a fine powder and generally partially covered by a pale elaiosome. The sixteen Leucospermum species that have been analysed are all diploids having twelve sets of homologue chromosomes (2n=24), which is consistent with the rest of the subtribe Proteinae. Differences with related genera Leucospermum differs from genera such as Protea, Leucadendron, Mimetes, Diastella, Paranomus, Serruria, and Orothamnus by having the flower heads in the axils of the leaves (although often very near the tip of the branch), small and inconspicuous bracts subtending the head, brightly coloured styles that are straight or curve toward the center of the flower head and extend far from the perianth, giving the flower head the appearance of a pincushion, and large nut-like fruits covered by a pale and soft layer that attracts ants. The style breaks out of the bud at the side facing the rim of the head, and the perianth lobes may stick together with four or three forming a sheath, or roll back individually. Sections Currently, the genus is subdivided in nine sections based on morphological communalities and differences. Brevifilamentum The six species of the section Brevifilamentum are sometimes called showy pincushions, and include several horticultural species. The species all share a character that is unique in the genus Leucospermum: their anthers top a short, 1–1½ mm (0.02–0.06 in) long filament that attach the anthers to the perianth, while in all other sections the anthers are directly fused with the limbs of the perianth lobes. The common base of the flowers in one head (or involucral receptacle) as can be seen by cutting lengthwise through a head is very narrowly conical with a sharp tip. The pollen presenter is egg-shaped, obliquely egg-shaped or hoof-shaped.