Hippeastrum Minerva
Scientific name: Hippeastrum spp.
Common name: Amaryllis. A label given by sellers and nurseries, and care should be taken not to confuse it with Amaryllis belladonna.
Images: see below
Origin: South America, Central America and the Carribean
Type: perennial
Plant description: Long, rather narrow leaves, six-petaled flower, which can grow up to 6 inches wide.The plant is often mistaken for a lily
Size: stem and leaves grow to up to 22 inches.
Light: Amaryllis loves sun, and you should find it the most well-lit place possible
Temperature: 20-30 degrees centigrade
Soil: nutritious potting compost; well-drained soil.
Watering: water sparingly until the bud and leaves appear, then increase waterings
Fertilizer: use half the recommended rate of any water soluble fertilizer.
Two or three applications of fertilizer during the growing season (March through September).
Hippeastrum cybister hybrid
Flowers: large trumpet-shaped flowers, red, white, pink, salmon and orange. There are also striped and multicolored varieties, combining red and white.
Propagation: Amaryllis can be propagated by seeds, offsets (bulblets) or cuttage. The best way to propagate Amaryllis is by separating the small bulbs which grow on the ''mother'' bulb. The bulblets can be divided during fall, when the leaves begin to turn yellow. Offsets should bloom within approximately three years.
An interesting experiment is to propagate Amaryllis from seeds. When the Amaryllis is in bloom, take a cotton swab and run it across the stamen. For pollination leave only one flower per stem. Then brush the pollen on to the tip of the pistil.
After the flower starts fading, a bulge will grow at the base of the bloom. Riping will last for about 2 months. When ripe, the pod will eventually burst open. Collect the seeds. They need to be sowed soon, otherwise they will lose viability. Not all of them will be viable, but you can collect about 20-40 viable seeds.
Sow the seeds in soilless substrate Keep growing medium moist, warm and in light. They will sprout randomly after at least three weeks. Baby Amaryllis should be transplanted only when they are big enough to be handled. It may take up to three years until you will have the first bloom and the plants resulted will not be identical to the mother plant.
Pests and diseases: the narcissus bulb fly, red bloch, a fungus disease
Extra tips: 
When buying the bulb, keep in mind that the bigger the bulb, the more flowers you will have
It is not necessary to separate the bulbs every year, but doing so will encourage uniform flowering and larger flowers.
Remove the dead blooms before the plant produces the seeds. Otherwise, flowering during the next season will be greatly reduced.

Carefully inspect the bulbs before buying, in order to prevent diseases.