13 
sepal with narrower base, not decurrent along the base of the 
column. Lip not symmetrical, only the right half is developed as 
such, the other half petaloid and grown together with the base 
of the column. Unpaired stamen undeveloped flanked by two 
stamens as in Diandrae. 
6) Legit J. A. van Straten, Blorong, in suo horto, May 1918. 
Pseudo-dimerous flower. Fig. 12. 
Dendrobium formosum Rxb. 
Legit J. J. Smrn in horto bog., Oct. 1918. 
Habitat India. 
The two paired sepals united to a keelshaped whole that is 
incised at top. Lip wanting. Pseudo-dimery. 
Dendrobium moschatum Sw. 
Legit J. J. Smirn in horto bog., November 1915. 
Habitat India. ; 
Pseudo-dimerous. Paired sepals coalescing, gee normal. Lip 0. 
Column with short, conic base. Fig. 13. 
For deviations in this genus formerly described we refer to 
2e Série, Vol. IV, p. 75—79, Vol. VIII p. 4—5, Vol. IX, p. 106, 
Vol. XIII p. 1830—131, Vol. XIV, p. 88. 
+ 
Spathoglottis plicata Bl. 
Legit J. J. S. in horto bog., April 1916. 
Habitat Arroo Isl. 
Dimerous: 2 sepals, 1. petal opposite the lip. Petal erect, 
wider than usual, lip somewhat deformed at the top. Column 
much less bent than usual, flattened backward, top irregular. 
Anther 0. Ovary four-grooyed in connection with the dimery. 
In the tetramerous flower which we described 1903 ') there 
were as many as eight grooves on the ovary. 
1) 2e Série, Vol. 1V. p. 75. 
