94 



A NATURALIST'S WANBEBINGS 



probably occur on a second floret of its own species, within a 

 wide area. Flowers with this cottformation, however, remain 

 eKpanded and fresh for several days, in marked contrast to 

 those of the first form, which close np in a very few hours. 



In the median line of the uj>j>er surface of the rostellum 

 there is a weU-mnrked ridge (Fig. 22) which runs out to the tip 

 to form the central promontory of the rostellum. In describing 

 Fhajm Bhmei I remarked that there existed on the back of the 

 stigma a prominent ridge running down nearly to the ovary. 

 Xow if we were to suppose the ridged rostellum of Arunditia 

 to become adherent to the back of the stigma instead of 

 hanging down free, we should have such a ridge as is seen in 



riG, 23. 



FIG, 25.— CHRTSOGI^UM SP. THB Ttd. OH "THE LETT nKTBISt^'rs TWO FI^JRETfl 

 ON FLOWEE STEM ; THAT ON THE BICttT OlfB CLElfiTUQAMOBSLY FESTILISEI)^ 



Phajus; so that it is probable that tlie ridge in the latter 

 phuit may be the remnant of its rostellnm adherent to the 

 back of the stigma. 



Abundant on trees at 2000 feet above the sea, I gathered the 

 dnll-flowered Eria aJbidO'tomentom, remarkable for having its 

 perianth densely covered with a felty mass of white wool. Its 

 anther is separated by a rim-like rostellum from the broad and 

 rather sliallow stigma. 0 ut of sixty flowers which I examined at 

 various times, I did not Ond one otherwise than sell-fertilised 

 while still in the bud, by the viscid matter of the stigma swelling 



