Chap. HI. ^GIPHILA ELATA. 123 



CrATOXYLON FOEMOSTJM (HTPBRIOINEa;). 



Mr. Thiselton Dyer remarks that this tree, an inhabitant of 

 Malacca and Borneo, appears to be heterostyled.* He sent me 

 dried flowers, and the difference between the two forms is con- 

 spicuous. In the long-styled form the pistils are in length to 

 those of the short-styled as 100 to 40, with their globular 

 stigmas about twice as thick. These stand just above the numer- 

 ous anthers and a little beneath the tips of the petals. In the 

 short^styled form the anthers project high above the pistils, the 

 stigmas of which diverge between the three bundles of stamens, 

 and stand only a little above the tips of the sepals. The 

 stamens in this form are to those of the long-styled as 100 to 86 

 in length ; and therefore they do not differ so much in length 

 as do the pistils. Ten pollen-grains from each form were 

 measured, and those from the short-styled were to those from 

 the long-styled as 100 to 86 in diameter. This plant, therefore, 

 is in all respects a weU-characterised heterostyled species. 



.^GIPHTLA ELATA (VeEBENACB^). 



Mr. Bentham was so kind as to send me dried flowers of this 

 species and of M. mollis, |both inhabitants of South America. 

 The two forms differ conspicuously, as the deeply bifid stigma 

 of the one, and the anthers of the other project far above the 

 mouth of the corolla. In the long-styled form of the present 

 species, the style is twice and a half as long as that of the short- 

 styled. The divergent stigmas of the two forms, do not differ 

 much in length, nor as far as I could perceive in their papillae. 

 In the long-styled flowers the filaments adhere to the corolla 

 close up to the anthers, which are enclosed some way down 

 within the tube. In the short-styled flowers the filaments are 

 free above the point where the anthers are seated in the other 

 form, and they project from the corolla to an equal height with 

 that of the stigmas in the long-styled flowers. It is often 

 difBcult to measure with accuracy pollen-grains, which have 

 long been dried and then soaked in water; but they here 

 manifestly differed greatly in size. Those from the short-styled 

 flowers were to those from the long-styled in diameter in 



' Journal of Botany,' London, 1872, p. 26. 



