Are Catasetum and Lomandra both genus of plants ?
yes
Catasetum
Catasetum, abbreviated as Ctsm in horticultural trade, is a genus of showy epiphytic Orchids, family Orchidaceae, subfamily Epidendroideae, tribe Cymbidieae, subtribe Catasetinae, with 166 species, many of which are highly prized in horticulture.
Lomandra
Lomandra (also known as mat rushes, ) is a genus of perennial herbs in the family Asparagaceae, subfamily Lomandroideae.
 There are 51 species, all of which are native to Australia; two of them also extend into New Guinea and New Caledonia.
Lomandroideae
Lomandroideae is a subfamily of monocot flowering plants in the family Asparagaceae, order Asparagales, according to the APG III system of 2009.
 The subfamily name is derived from the generic name of the type genus, "Lomandra".
 The group has previously been treated as a separate family Laxmanniaceae.
 In the Kubitzki system, it is treated as Lomandraceae Lotsy.