(western USA) Spiranthes praecox (Walter) S.Watson in A.Gray (1890) – early-blooming spiranthes, green-vein ladies'-tresses (eastern USA) Spiranthes pusilla (Blume) Miq. (1859) (Sumatra) Spiranthes romanzoffiana Cham. (1828) – hooded ladies'-tresses (British Isles, North America) Spiranthes × sierrae M.C.Pace (2019) (California) Spiranthes × simpsonii Catling & Sheviak (1993) (Southeastern Canada to north-central U.S.A.) Spiranthes sinensis (Pers.) Ames (1908) – Chinese Spiranthes (East Asia) Spiranthes spiralis (L.) Chevall. (1827) – autumn ladies-tresses, spiraled Spiranthes (Europe, Mediterranean, Caucasus Mountains) Spiranthes × stellata P.M.Br., Dueck & K.M.Cameron (2008) (Central California) Spiranthes suishaensis (Hayata) Schltr. (1919) – Taiwan ladies'-tresses (Taiwan) Spiranthes sunii Boufford & Wen H. Zhang (2008) (Gansu, China) Spiranthes sylvatica P.M.Br. (2008) (Florida) Spiranthes torta (Thunb.) Garay & H.R.Sweet in R.A.Howard (1974) – southern ladies'-tresses (Florida, Caribbean, Mexico, Central America) Spiranthes triloba (Small) J.K. Schum. (1898) – Panther ladies'-tresses (Florida) Spiranthes tuberosa Raf. (1833) – little ladies'-tresses (eastern USA) Spiranthes vernalis Engelm. & A.Gray (1845) – spring ladies'-tresses (North America, Bahamas) Spiranthes × zahlbruckneri H.Fleischm. (1910) (Europe) Ecology Pollination Spiranthes are primarily pollinated by bumblebees, however other bee genera also pollinate various species, including halictid bees, and honey bees (particularly in Europe and Asia). References Cranichideae genera