Van Gogh painted several landscapes with flowers, including roses, lilacs, irises, and sunflowers. By this time, Europeans started planting new flowers such as tulips, marigolds and sunflowers. They'll glean the seeds of grass, dandelions, chickweed, sunflowers and ragweed. The Apalachee grew numerous varieties of corn, pumpkins and sunflowers. Growing wheat, rye, corn, potatoes, sugar beets, grains, fruits and sunflowers. Among other plants that can self-pollinate are many kinds of orchids, peas, sunflowers and tridax. Commercial crops grown include beets, flax, sunflowers and even rice. Dryland farmed crops may include winter wheat, corn, beans, sunflowers or even watermelon. Other agricultural cash crops include cotton, sugarcane, cassava, sunflowers, wheat, and corn. The Iroquoians cultivated corn, marrow, sunflowers, and beans. Such varieties are being developed for rice, wheat, sorghum, pigeon pea, barley, and sunflowers. The main industrial crops are sugar beets, sunflowers, and tobacco. The primary cultivation is dryland farming of cereals, olive trees, vineyards and sunflowers. Such varieties are being developed for rice, wheat, sorghum, barley, and sunflowers. Corn, sugarbeets and sunflowers are the leading crops.