Are Hippeastrum and Desmodium both genus of plants ?
yes
Hippeastrum
Hippeastrum is a genus of about 90 species and over 600 hybrids and cultivars of perennial herbaceous bulbous plants.
 They generally have large fleshy bulbs and tall broad leaves, generally evergreen, and large red or purple flowers.
Desmodium
Desmodium is a genus in the flowering plant family Fabaceae, sometimes called tick-trefoil, tick clover, hitch hikers or beggar lice.
 There are dozens of species and the delimitation of the genus has shifted much over time.
Amaryllis
Amaryllis ( ) is the only genus in the subtribe Amaryllidinae (tribe Amaryllideae).
 It is a small genus of flowering bulbs, with two species.
 The better known of the two, "Amaryllis belladonna", is a native of the Western Cape region of South Africa, particularly the rocky southwest area between the Olifants River Valley to Knysna.
 For many years there was confusion among botanists over the generic names "Amaryllis" and "Hippeastrum", one result of which is that the common name "amaryllis" is mainly used for cultivars of the genus "Hippeastrum", widely sold in the winter months for their ability to bloom indoors.
 Plants of the genus "Amaryllis" are known as belladonna lily, Jersey lily, naked lady, amarillo, Easter lily in Southern Australia or, in South Africa, March lily due to its propensity to flower around March.
 This is one of numerous genera with the common name "lily" due to their flower shape and growth habit.
 However, they are only distantly related to the true lily, "Lilium". Codariocalyx
Codariocalyx is a genus of flowering plants in the legume family, Fabaceae.
 It belongs to the subfamily Faboideae.
 This genus has been largely debated with the genus "Desmodium" on whether they are separate or the same genus.