134 HETEEOSTYLED DIMORPHIC PLANTS. CaiP. III. 



me that he could detect no difference in the size of the pollen- 

 grains in the two forms. Nevertheless, there can be no doubt 

 that this plant is heterostyled. 



LIPOSTOMA [SP. ?] (RUBIAOEJE). 



Dried flowers of this plant, which grows in small wet ditches 

 in St. Catharina, in Brazil, were likewise sent me by Fritz 

 Miiller. In the long-styled form the exserted stigma stands 

 rather above the level of the exserted anthers of the other form ; 

 whilst in the short-styled form it stands on a level with tho 

 anthers of the other form. So that the want of strict corre- 

 spondence in height between the stfgmas and anthers in the two 

 forms is reversed, compared with what occurs in Hedyotis. The 

 long-styled pistil is to that of the short-styled as 100 to 36 in 

 length ; and its divergent stigmas are longer by fully one-third 

 of their own length than those of the short-styled form. In the 

 latter the anthers are a little larger, and the pollen-grains are 

 as 100 to 80 in diameter, compared with those from the long- 

 styled form. 



CINCHONA MICKANTHA (KUBIACE.E). 



Dried specimens of both forms of this plant were sent me from 

 Kew.* In the long-styled form the apex of the stigma stands 

 just beneath the bases of the hairy lobes of the corolla ; whilst 

 the summits of the anthers are seated about halfway down 

 the tube. The pistil is in length as 100 to 38 to that of the 

 short-styled form. In the latter the anthers occupy the same 

 position as the stigma of the other form, and they are con- 

 siderably longer than those of the long-styled form. As the 

 summit of the stigma in the short^styled form stands beneath 

 the bases of the anthers, which are seated halfway down tho 

 corolla, the style has been extremely shortened in this form 

 its length to that of the long-styled being, in the specimens 

 examined, only as 5' 3 to 100! The stigma, also, in the short- 

 styled form is very much shorter than that in the long-styled, 

 in the ratio of 57 to 100. The pollen-grains from the short- 



* My nttention was called to 3, given by Mr. Murkhara in hi 

 this plant by a drawing copied ' Travels in Peru,' p. J3D. 

 from Iluwiiid's ' Qtiinologia,' Tab. 



