Baker based his classification on the characteristics of the bulb, style, nectary and capsule valves. The 3 options were&colon; phloem unloading, or uptake or efflux from nectary parenchyma. The ovary is mostly sessile and has nectary glands. The flowers are usually small with a conspicuous nectary disk. The gynoecium has three connate carpels with the nectary on top of the gynoecium. There may also be a nectary producing nectar. The base of the flower has pale green bracts enclosing a swollen nectary chamber. At the center is a large nectary surrounded by stamens with large yellow anthers. The posterior sepal is fused with the pedicel to form a hypanthium (nectary tube). The short nectary is disk-like as well with 10 lobes. These organs include tentacle organs and a dorsal nectary organ (DNO). Two of the blue or white petals are joined together to form an arrow-like nectary. The base of the gynoecium forms a lobed nectary disc. There is a nectary at the widest part of the phyllode. In most Brassicaceae the nectary is at the base of the stamen filament.