IN JAVA. 



93 



anther-cap, as seen in Fig. 18 and in 19, where the anther-cap 

 is removed. 



On the conclusion of these singuhir movements no remahis 

 of the stigma can be seen. As a rule these operations are con- 

 cluded before the full expanding of the flower, whose petals, 

 after remaining expanded for only a 

 few hours, fade, and, closing round the 

 column, exclude anv intruder from dis- 

 turbing the interesting and mysterious 

 rites of nature being enacted within. 



I have found that in some cases the ^' 



rostellum (the upper margin of the 

 stigma) is not invaginated down the 

 stylary canal, but retains the more 

 natural orchideal form of a broad flat fig. 22. — ari-xdina speciosa, 



n 1 J^ J.^ '^^4.:^^ f-.« ^,-^-« SUOWIXG THE SECOXH FORM 



floor to the anther, projecting tar over 

 the stiiima as seen in Fijor. 22. When 



A--. 



OF flower; E, f, AS IN 



FIG. 16; I.RrDGE ox FI.OOFt 

 OF ANTHER H; K, BOIXDARY 

 OF ANTHER-CAP. 



the flower of Arundina speciosa has this 

 rare form it invariably, as far as my 



observations enable me to speak, falls off unfertilmd. The 

 pollinia also lie far back in the anther, and are entirely con- 

 cealed by the anther-case, which fits close down all round. An 

 insect, to secure the pollinia, would require to alight on the 



FIG. 23. 



FIG. 24. 



Firs 23 AN'D 24-ERlA SP.. NEAR TO E. JAVEXSIS ; A. ANXHER-CAP, I^' ™; 2^, 



stigma; d, bostellum; e, stigma. 



mai-in of the rostellar platform an.l lift up the anther rase a 

 difficult operation, which supposing it to have successfully 

 accomplished, it might wander far to find a stigma to apply 

 the pollen so obtained to, for its own form of organs does not 



