Spirantheae.

*Lip spurred ,or with a prominent sac.

79. PHYSURUS . Lip above the spur abruptly contracted ,hollow ,spreading ; blade entire or 2-lobed. Clinandrium hardly prominent. Leaves membranous , ovate or lanceolate.

80. ANCEOTOCHILUS . Claw of the lip long, spreading , fimbriate; blace 2-lobed . Clinandrium copular . Leaves subradical , ovate ,often coloured.

81. VRYDAGZINIA. Lip sessile . Base of column with 2 processess descending into the spur . Stem leafy.

83. HERPYSMA.Lip erect , concave , margins conuate with the column; spur long; blade spreading . Clinandrium hooked. Pollinia with rigid caudicles. Stem leafy.

** Lip not spurred, if saccate the sac concealed by the sepals.
Lip clawed , ventricose above the base (or sessile in Spiranthes).

84. ODONTOCHILUS. Lateral sepals counate , forming a mentum. Claw of lip toothed or fimbriate. Stein leafy ; flowers loosely spiked .

85. P. EMARIA. Sepals free. Claw of lip concave, entire; blade 2-lobed.Clindrium eupular. Stem leafy ; flowers loosely spiked racemed.

86. DOSSINIA.Sepals free. Lip with erect side lobes and a 2-fid midlobe. Column with a long appendage in front .

87. SPIRANTHES. Dorsal sepals and petals together forming a hood; lateral and column decurrent on the ovary or spike , lax or dense-fld., often second or spiral.

Lip not clawed (see also Spiranthes ) sessile or adnate to the column ; base not ventricose .

88. NEOTTIA. Leafless scaly herbs . Seapals and petals free, spreading .

90. CHEIROSTYLIS Stem with 2 opposite or subopposite leaves . Sepals and petals free, spreading .

Lip sessile ,not clawed , often adnate to the column , usually shorter than the sepals , base ventricose (ercept Zeuxine ).

91. ZEUXINE . Sepals free,dorsal with the petals cohering in a hood. Column with appenadages .

92. GtLOPHILA . Dorsal sepal hooded ; lateral obliquely adnate to the base of the column . Lip with a small linear inflexed blade .

93 . GOODYERA . Sepals free. Lip erect , entire .Clinandrium cup-shaped .

94. HETAERIA . Sepals free or connate below . Lip at the base more or less adnate to the column , entire or with 2 spreading lobes.