8] 
1. The specimen was observed on a short branch under the 
lowest leaves of a stem. Of the perianth only the outer whorl 
or calyx has developed. The middle sepal is spathulate, 3 cM. 
long, at the base 6.5 mM. wide. At '/, from the basis the sepal 
broadens to 2 cM., the edge of the upper half undulating. The 
lateral sepals are 14 and 2 mM. longer than the middle one 
and show at their backs a longitudinal keel; they are grown 
together 9 mM. from the base upwards, and strongly folded. 
The gynostemium has at the base a width of 1 cM. but 
narrows higher up almost suddenly. The anther is not flat, as 
usual in Vanda, but helmetshaped, not deciduous, so that in 
trying to remove the pollinia only the viscid substance together 
with the ribbonlike stipes yields. 
At either side of this anther a smaller one has developed, 
from the left of which the viscid matter with stipes came out 
at once, whereas in the other a slight pressure was required. 
When drying the alcoholic preparation also the filaments of the 
extra stamens make their appearance. The figure drawn after 
this dried up specimen shows an additional couple of petaloid 
excrescenses emerging from either anther-cell of the chief stamen ; 
the one covering the rostellum, the other projecting to the front. 
It should be finally noted that the place occupied by the 
extra stamens leaves no doubt about their real nature, being 
the normally suppressed stamens which usually take the form 
of the lateral parts of the clinandriuam. Whether a little pointed 
excrescense under the column represents the labetlum or the 
third antipetalous stamen, we must leave undecided. 
2. Topmost flower of an inflorescence. Sepals, petals and co- 
lumn normal. Labellum at the base with two short spurs, one 
of the sidelobes of the labellum grown together with the foot 
of the middle lobe and coloured like the sepals and petals. In 
connection herewith it should be borne in mind that in this 
specimen the labellum is magenta red and the sepals and petals 
light yellow with brown specks. 
Vanda Hookeriana Rehb. f. 
Habitat Sumatra, Borneo, Malacca. 
Ann. Jard. bot. Buitenz. 2e Sér. Vol. 1V. 6 
