548 MB. H. O. FOBBES OUT 



ably self-fertilized, and in many cases impossible to be other than 

 self-fertilized ; I have also described the mechanism of their ferti- 

 lization, such as occurs in the species of Phaius, in SpatJioglottis 

 plicata, and other species of the genus, and especially in Arundina 

 speciosa. Eria aTbido-tomentosa and JS. javensis I have never found 

 otherwise than self-fertilized ; and a species belonging to a genus 

 near to CTirysoglossum I have shown to be cleistogamous. The 

 observations above given would seem, therefore, to support the 

 Uev. G-. Henslow's conclusions so ably given in his Memoir on 

 the Self-fertilization of Plants, already published iu the Trans- 

 actions of this Society (n. s. vol. i. pp. 317-398, pi. 46, 1879). 

 My absence abroad prevented my seeing this paper till quite 

 recently, and after I had completed these Notes. 



DESCRIPTION OF THE PLATES. 



Plate XVI. 



Phaius Blumei. 



Fig. 1. Shows a flower in which the pollinia have become much swollen, and 

 slipped down a little below the anther-cap ; they are already in con- 

 tact with the viscid fluid of the stigma. Magnified. 



2. Represents a very young bud, greatly magnified ; the pollinia are in 



their erect position. There is no rostellum. 



3. A bud still further advanced ; the pollinia have rotated somewhat for- 



wards. 



4. Shows a flower of the first form as described in the text, with the 



pollinia and the anther-cap removed, showing the rostellum. 



5. Exhibits a flower (of the first form) in which the pollinia are swollen 



up, and pressing down before them the rostellum, and emitting over 

 its rim their tubes into the stigma. 



6. Represents a Phaius (of the second form) with the anther-cap removed 



(but shown dotted in), in which the pollinia are quite bathed in the 

 stigmatic fluid and have become cheesy. 



7. Is a longitudinal section, showing the knob a, representing the modified 



rudimentary rostellum ; b indicates the margin of the stigma. 



8. Shows a flower with an extra anther. 



Sggthoglottis plicata. 



9. A bud, showing the swollen-up pollinia appearing below the lip of the 



anther-cap. 



10. Longitudinal lateral section, showing the position of the rostellum and 



the long caudicles of the pollinia, in somewhat advanced stage. 



11. Fully fertilized &pathoglottis (of the white variety), in which the flaps 



of the lower edge of the stigma do not embrace the anther-cap as in 



12. which represents the anther-cap (in the purple variety) bound down by 



the flaps of the column and of the lower edges of the stigma. 



