Oryza glaberrima mature more quickly, and may be sown directly on higher ground, eliminating the need to transplant seedlings. Most is rain-watered, and the soil is often not cultivated. African rice has profuse vegetative growth, which smothers weeds. It exhibits better resistance to various rice pests and diseases, such as blast disease, African rice gall midge ("Orseolia oryzivora"), parasitic nematodes ("Heterodera sacchari" and "Meloidogyne" spp.), rice stripe necrosis virus, rice yellow mottle virus, and the parasitic plant "Striga". Most African rices shatter more than Asian rices, possibly because they have not been domesticated for as long. A few varieties of African rice
Cannabis sativa Cannabis sativa Cannabis sativa is an annual herbaceous flowering plant indigenous to eastern Asia but now of cosmopolitan distribution due to widespread cultivation. It has been cultivated throughout recorded history, used as a source of industrial fiber, seed oil, food, recreation, religious and spiritual moods and medicine. Each part of the plant is harvested differently, depending on the purpose of its use. The species was first classified by Carl Linnaeus in 1753. The flowers of "Cannabis sativa" are unisexual and plants are most often either male or female. It is a short-day flowering plant, with staminate (male) plants usually taller