Thismia is a genus of myco-heterotrophic plants in family Burmanniaceae, first described as a genus in 1845. It is native to East and Southeast Asia, New Guinea, Australia, New Zealand, and the Americas.

Species

, Plants of the World Online recognises 108 species in this genus, as follows: • Thismia abei (Akasawa) Hatus. • Thismia acuminata Hrones, Dancák & Sochor • Thismia alba Holttum ex Jonker • Thismia americana N.Pfeiff. • Thismia andicola Aguilar-Cano, S.Guzm.-Guzm. & Lopera-Toro • Thismia angustimitra Chantanaorr. • Thismia annamensis K.Larsen & Aver. • Thismia appendiculata Schltr. • Thismia arachnites Ridl. • Thismia aseroe Becc. • Thismia aurantiaca Hareesh & M.Sabu • Thismia belumensis Siti-Munirah & Suhaimi-Miloko • Thismia betung-kerihunensis Tsukaya & H.Okada • Thismia bifida M.Hotta • Thismia bokorensis Suetsugu & Tsukaya • Thismia breviappendiculata Nob.Tanaka • Thismia brunneomitra Hrones, Kobrlová & Dancák • Thismia brunneomitroides Suetsugu & Tsukaya • Thismia brunonis Griff. • Thismia bryndonii Tsukaya, Suetsugu & Suleiman • Thismia calcarata D.F.Silva, Honório & J.M.A.Braga • Thismia caudata Maas & H.Maas • Thismia chrysops Ridl. • Thismia clandestina (Blume) Miq. • Thismia clavarioides K.R.Thiele • Thismia claviformis Chantanaorr. & J.Wai • Thismia clavigera (Becc.) F.Muell. • Thismia clavigeroides Chantanaorr. & Seelanan • Thismia cordata D.F.Silva & J.M.A.Braga • Thismia cornuta Hrones, Sochor & Dancák • Thismia coronata Hrones, Dancák & Sochor • Thismia crocea (Becc.) J.J.Sm. • Thismia domei Siti-Munirah • Thismia episcopalis (Becc.) F.Muell. • Thismia espirito-santensis Brade • Thismia filiformis Chantanaorr. • Thismia fumida Ridl. • Thismia fungiformis (Taub. ex Warm.) Maas & H.Maas • Thismia gardneriana Hook.f. ex Thwaites • Thismia gigantea (Jonker) Hroneš • Thismia glaziovii Poulsen • Thismia gongshanensis Hong Qing Li & Y.K.Bi • Thismia goodii Kiew • Thismia grandiflora Ridl. • Thismia guangdongensis Xiao J.Li, A.Liu & D.X.Zhang • Thismia hawkesii W.E.Cooper • Thismia hexagona Dančák, Hroneš, Kobrlová & Sochor • Thismia hongkongensis Mar & R.M.K.Saunders • Thismia huangii P.Y.Jiang & T.H.Hsieh • Thismia hyalina (Miers) Benth. & Hook.f. ex F.Muell. • Thismia iguassuensis (Miers) Warm. • Thismia inconspicua Sochor & Dancák • Thismia janeirensis Warm. • Thismia javanica J.J.Sm. • Thismia jianfenglingensis Han Xu, H.J.Yang & S.Q.Fang • Thismia kelabitiana Dančák, Hroneš & Sochor • Thismia kelantanensis Siti-Munirah • Thismia kenyirensis Siti-Munirah & Dome • Thismia kinabaluensis T.Nishioka & Suetsugu • Thismia kobensis Suetsugu • Thismia labiata J.J.Sm. • Thismia laevis Sochor, Dancák & Hrones • Thismia lanternata W.E.Cooper • Thismia latiffiana Siti-Munirah & Dome • Thismia lauriana Jarvie • Thismia limkokthayi Siti-Munirah & E.Chan • Thismia luetzelburgii Goebel & Suess. • Thismia macahensis (Miers) F.Muell. • Thismia mantiqueirensis Engels & E.C.Smidt • Thismia megalongensis C.A.Hunt, G.Steenbee. & V.Merckx • Thismia melanomitra Maas & H.Maas • Thismia minutissima Dančák, Hroneš & Sochor • Thismia mirabilis K.Larsen • Thismia mucronata Nuraliev • Thismia mullerensis Tsukaya & H.Okada • Thismia neptunis Becc. • Thismia nigra Dančák, Hroneš & Sochor • Thismia nigricans Chantanaorr. & Sridith • Thismia nigricoronata Kumar & S.W.Gale • Thismia okhaensis Luu, Tich, G.Tran & Dinh • Thismia ophiuris Becc. • Thismia ornata Dančák, Hroneš & Sochor • Thismia pallida Hrones, Dancák & Rejzek • Thismia panamensis (Standl.) Jonker • Thismia paradisiaca S.Guzm.-Guzm. • Thismia petasiformis D.F.Silva & J.M.A.Braga • Thismia prataensis Mancinelli, C.T.Blum & E.C.Smidt • Thismia pseudomelanomitra D.F.Silva & J.M.A.Braga • Thismia puberula Nuraliev • Thismia racemosa Ridl. • Thismia ribeiroi Engels, D.F.Silva & Soares-Lopes • Thismia rodwayi F.Muell. • Thismia sahyadrica Sujanapal, Robi & Dantas • Thismia saulensis H.Maas & Maas • Thismia singeri (de la Sota) Maas & H.Maas • Thismia sitimeriamiae Siti-Munirah, Dome & Thorogood • Thismia submucronata Chantanaorr., Tetsana & Tripetch • Thismia sumatrana Suetsugu & Tsukaya • Thismia taiwanensis Sheng Z.Yang, R.M.K.Saunders & C.J.Hsu • Thismia tectipora Cowie • Thismia tentaculata K.Larsen & Aver. • Thismia terengganuensis Siti-Munirah • Thismia thaithongiana Chantanaorr. & Suddee • Thismia tuberculata Hatus. • Thismia variabilis D.F.Silva, Honório & J.M.A.Braga • Thismia violacea D.F.Silva & J.M.A.Braga • Thismia viridistriata Sochor, Hrones & Dancák • Thismia yorkensis Cribb