See here In the botanical classification of plants, Aeridinae Pfitzer is a subtribe of the tribe Vandeae (Family Orchidaceae) whose representatives all have a monopodial growth habit and do not possess pseudobulbs.

They are distinguished from the other subtribes of Vandeae by having an entire rostellum, a relatively small spur formed by the lip, and four (or two) pollinia.

Also included in this subtribe are some of the most economically important genera in the horticultural trade, such as Phalaenopsis[6] and Vanda.

[10] The roots of leafless epiphytic orchids are also heavily colonized by nitrogen-fixating cyanobacteria, which are thought to supply the plants with nitrogen.

Aerangidinae):[13] Aeridinae Angraecinae (including Aerangidinae) Adrorhizinae Polystachyinae The following genera are accepted members of the subtribe Aeridinae according to Chase et al., 2015:[14] However, this classification includes genera, which are not recognized by Plants of the World Online of the Royal Botanic Gardens, Kew: Additionally, some new genera have been recognized since the publication from Chase et al., 2015: