clavate, with a small, round viscidium. Ovary fusiform, sessile, 
hardly twisted. 
Terrestrial, slender plants, commonly autogamous. Roots 
cylindric, slender, fleshy, pubescent. Leaves basal, petiolate. 
Stem from a decumbent, short rhizome, erect or suberect, 
remotely few-bracteate, terminated by a loosely to densely flo- 
wered spike. Flowers small. 
TYPE: Manniella americana C. Schweinf. & Garay 
Two species native to South America, in the Venezuela- 
Guayana Massif. 
Index to species 
Helonoma americana (C. Schweinf. & Garay) Garay, comb. nov. 
Basionym: Manniella americana C. Schweinf. & Garay in Bot. Mus. 
Leafl. 20:5, 1962. 
Helonoma bifida (Rid!.) Garay, comb. nov. 
Basionym: Spiranthes bifida Ridl. in Thimeri 5: 105, 1886. 
Ibidium Salisb. ex Small 
Becki (Lind|.) House = Spiranthes lacera (Raf.) Raf. 
cernuum (L.) House = Spiranthes cernua (L.) L.C. Rich. 
coloratum(N.E.Br.) House = Stenorrhynchos speciosum (Jacq.) L.C. Rich. 
ex Spreng. 
crystalligerum Salisb. = Sacoila lanceolata (Aubl.) Garay 
elatum (Sw.) Salisb. = Beadlea elata (Sw.) Small 
floridanum Wherry = Spiranthes floridana (Wherry) Cory 
gracile (Bigel.) House = Spiranthes lacera (Raf.) Rat. 
incurvum Jennings = Spiranthes cernua (L.) L.C. Rich. 
X intermedium (Ames) House = Spiranthes X intermedia Ames 
laciniatum (Small) House = Spiranthes laciniata (Small) Ames 
longilabre (Lind1.) House = Spiranthes longlabris Lindl. 
lucayanum Britt. = Mesadenus lucayanus (Britt.) Schltr. 
ochroleucum (Rydb.) House = Spiranthes ochroleuca (Rydb.) Rydb. 
odoratum (Nutt.) House = Spiranthes odorata (Nutt.) Lindl. 
ovale (Lindl.) House = Spiranthes ovalis Lindl. 
parviflorum (Chapm.) Jennings = Spiranthes ovalis Lindl. 
plantagineum (Raf.) House = Spiranthes lucida (H.H. Eaton) Ames 
porrifolium (Lindl.) Rydb. = Spiranthes porrifolia Lindl. 
praecox (Walt.) House = Spiranthes praecox (Walt.) Wats. 
quinquelobatum (Poir.) J. Acuna = Spiranthes torta (Thunb.) Garay 
& Sweet 
Romanzoffianum (Cham.) House = Spiranthes Romanzoffiana Cham. 
speciosum (Jacq.) Salisb. = Stenorrhynchos speciosum (Jacq.) L.C.Rich. 
ex Spreng. 
328 
