Pollen cell. In flowering plants the vegetative tube cell produces the pollen tube, and the generative cell divides to form the two sperm cells. Pollen is produced in the microsporangia in the male cone of a conifer or other gymnosperm or in the anthers of an angiosperm flower. Pollen grains come in a wide variety of shapes, sizes, and surface markings characteristic of the species (see electron micrograph, right). Pollen grains of pines, firs, and spruces are winged. The smallest pollen grain, that of the forget-me-not ("Myosotis" spp.), is around 6 µm (0.006 mm) in diameter. Wind-borne pollen grains can be
Grains of Selim stews. Other regional names include "kimba" and "kili". In Senegal, The grains are a key ingredient in Touba-style coffee (called in French). Near the end of the roasting phase of making the coffee, grains of Selim, known in Wolof as , are added while the heat is still on. Roasting continues for approximately five more minutes; during this time the sneeze-producing scent of pepper becomes easily discernible. Grains of Selim Grains of Selim are the seeds of a shrubby tree, "Xylopia aethiopica", found in Africa. The seeds have a musky flavor and are used as a spice in a manner