Polystachya concreta, the greater yellowspike orchid, is a species of orchid native to tropical and subtropical America, Africa and Asia.
Epidendrum concretum Jacq. is the basionym. Other synonyms include:
Callista flavescens (Lindl.) Kuntze
Cranichis luteola Sw.
Dendrobium flavescens Lindl.
Dendrobium polystachyum Sw.
Dendrorkis estrellensis (Rchb.f.) Kuntze
Dendrorkis extinctoria (Rchb.f.) Kuntze
Dendrorkis minuta (Aubl.) Kuntze
Dendrorkis polystachyon (Sw.) Kuntze
Dendrorkis purpurea (Wight) Kuntze ...