81 



1. The specimen was ohserved 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 U 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 3aelds. 



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 clinandrium. Whether a little pointed 

 excrescense under the column represents the labellum 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 lal)ellum grown together with the foot 

 of the middle lobe and coloured like the sepals and petals. In 

 connection herewith it should be l)orne in mind that in this 

 specimen the labellum is magenta red and the sepals and petals 

 light yellow with brown specks. 



Vanda HooJceriana Rchb. f. 



Habitat Sumatra, Borneo, Malacca. 



Ann. Jard. bot. Buitenz. 2e Se'r. Vol. IV. ft 



