Different types of Amaryllis-just an explanation
Saying one has Amaryllis bulbs could mean one of numerous things.
There are Hippeastrum hybrids and they are of the Family: Amaryllidaceae (amaryllis Family). They are commonly named varieties and sold in 'kits' in big box stores. They are 'usually only hardy in zones 9-11 and are most often grown indoors and flower in the winter or early spring. In warmer climates, they can be planted outdoors and left year round.
Some examples of Hippeastrum can be found here at The Pacific Bulb Society.
There are also other members of the Family: Amaryllidaceae (amaryllis Family).
They include Lycoris Radiata which is hardy in zones 7-10.
Then there is the much hardier Lycoris squamigera (also of the amaryllis Family) that is hardy in zones 5-10.
Here are several varieties of Lycoris which are of the Amaryllidaceae (amaryllis) Family.
There are also many other varieties of the amaryllis Family
My post is a result recent post and some off the board emails...so just thought I would reply here. Feel free to add additional info about Amaryllis.
Here is a link that might be useful: Amaryllis/Hippeastrum Forum