| Arachnis alba (Ridl.) Schltr. | Synonym |  | WCSP |  | 
	
		| Arachnis annamensis (Rolfe) J.J.Sm. | Accepted |  | WCSP |  | 
	
		| Arachnis beccarii Rchb.f. | Accepted |  | WCSP |  | 
	
		| Arachnis beccarii var. beccarii | Synonym |  | WCSP |  | 
	
		| Arachnis beccarii var. imthurnii (Rolfe) K.W.Tan | Accepted |  | WCSP |  | 
	
		| Arachnis bella (Rchb.f.) J.J.Sm. | Synonym |  | WCSP |  | 
	
		| Arachnis bilinguis Benth. [Invalid] | Synonym |  | WCSP |  | 
	
		| Arachnis breviscapa (J.J.Sm.) J.J.Sm. | Accepted |  | WCSP |  | 
	
		| Arachnis calcarata Holttum | Synonym |  | WCSP |  | 
	
		| Arachnis calcarata subsp. longisepala J.J.Wood | Synonym |  | WCSP |  | 
	
		| Arachnis canniformis (Guillaumin) Tang & F.T.Wang | Synonym |  | WCSP |  | 
	
		| Arachnis cathcartii (Lindl.) J.J.Sm. | Synonym |  | WCSP |  | 
	
		| Arachnis celebica (Schltr.) J.J.Sm. | Accepted |  | WCSP |  | 
	
		| Arachnis clarkei (Rchb.f.) J.J.Sm. | Synonym |  | WCSP |  | 
	
		| Arachnis evrardii (Guillaumin) Tang & F.T.Wang | Synonym |  | WCSP |  | 
	
		| Arachnis flos-aeris (L.) Rchb.f. | Accepted |  | WCSP |  | 
	
		| Arachnis flos-aeris var. gracilis Holttum | Synonym |  | WCSP |  | 
	
		| Arachnis grandisepala J.J.Wood | Accepted |  | WCSP |  | 
	
		| Arachnis hookeriana (Rchb.f.) Rchb.f. | Accepted |  | WCSP |  | 
	
		| Arachnis imthurnii (Rolfe) L.O.Williams | Synonym |  | WCSP |  | 
	
		| Arachnis labrosa (Lindl. & Paxton) Rchb.f. | Accepted |  | WCSP |  | 
	
		| Arachnis labrosa var. labrosa | Synonym |  | WCSP |  | 
	
		| Arachnis labrosa var. zhaoi (Z.J.Liu, S.C.Chen & S.P.Lei) S.C.Chen & J.J.Wood | Accepted |  | WCSP |  | 
	
		| Arachnis limax Seidenf. | Accepted |  | WCSP |  | 
	
		| Arachnis longicaulis (Schltr.) L.O.Williams | Accepted |  | WCSP |  | 
	
		| Arachnis longicaulis f. flavescens Valmayor & D.Tiu | Synonym |  | WCSP |  | 
	
		| Arachnis longisepala (J.J.Wood) Shim, Soón & A.L.Lamb | Accepted |  | WCSP |  | 
	
		| Arachnis lowii (Lindl.) Rchb.f. | Synonym |  | WCSP |  | 
	
		| Arachnis lyonii Ames | Synonym |  | WCSP |  | 
	
		| Arachnis × maingayi (Hook.f.) Schltr. | Accepted |  | WCSP |  | 
	
		| Arachnis moschifera Blume | Synonym |  | WCSP |  | 
	
		| Arachnis muelleri (Kraenzl.) J.J.Sm. | Synonym |  | WCSP |  | 
	
		| Arachnis philippinensis (Lindl.) Ames | Synonym |  | WCSP |  | 
	
		| Arachnis rohaniana (Rchb.f.) Rchb.f. | Synonym |  | WCSP |  | 
	
		| Arachnis siamensis (Schltr.) Tang & F.T.Wang | Synonym |  | WCSP |  | 
	
		| Arachnis sulingi (Blume) Rchb.f. | Synonym |  | WCSP |  | 
	
		| Arachnis × vanmullemii J.J.Sm. | Synonym |  | WCSP |  | 
	
		| Arachnis zhaoi Z.J.Liu, S.C.Chen & S.P.Lei | Synonym |  | WCSP |  |