yes
adenium obesum
Adenium obesum was created in 1819.
No
Adenium is any of a species of shrubs classified in the genus Adenium, which are native to Africa, with many colourful flowers on gnarled branches.
Plumeria Acuminata
Adenium
Dicot
hummingbirds
Organic compounds contain carbon
There are two plants called the desert rose. By the reference to a 'flyer', you are probably meaning the Sturt's Desert Rose of Australia. If so, you do not need to pre-treat or remove the 'flyer'. Just sow seed in potting mix - you can buy a mix especially for native plants. If your question relates to the succulent Adenium obesum, which is from the oleander family, then you also don't need to pre-treat the seed.
Asclepias speciosa is commonly known as showy milkweed. It is one of the least toxic milkweed and is found across the US and Canada. Hummingbirds and monarch butterflies are attracted to it.