TL;DR: The subtribe Goodyerinae Ridley is a group of about 730 species, of mostly terrestrial orchids with a Pantropical to circumboreal distribution, known as jewel orchid because some taxa have gold to silver coloured veining on the leaves.
Abstract: Subtribe Goodyerinae Ridley (1907: 12) is a group of about 730 species (in ca. 35 genera), of mostly terrestrial orchids with a Pantropical to circumboreal distribution. Most species ( ca. 500 in 30 genera) are found in the Old World, usually in montane forests. Generally they are known as jewel orchids because some taxa [especially in the genera Anoectochilus Blume (1825: 411), Ludisia Richard (1825: 437), and Macodes (Blume 1825: 407) Lindley (1840: 496)] have gold to silver coloured veining on the leaves.