CHAP. III. RUBIACE.E. 133 



The pistil in the long-styled flowers is longer by about a quarter 

 of its length, and the stamens shorter in about the same pro- 

 portion, than the corresponding organs in the short-styled 

 flowers. In the latter the anthers are longer, and the divergent 

 stigmas decidedly longer and apparently thinner than in tho 

 long-styled form. Owing to the state of the specimens, I could 

 not decide whether the stigmatic papillte were longer in the 

 one form than in the other. The pollen-grains, distended with 

 water, from the short-styled flowers were to those from the long- 

 styled as 100 to 78 in diameter, as deduced from the mean of 

 ten measurements of each kind. 



HKDYOTIS [SP. ?] 



Fritz Miiller sent me from St. Catharina, in Brazil, dried flowers 

 of a small delicate species, which grows on wet sand near tho 

 edges of fresh-water pools. In the long-styled form the stigma 

 projects above the corolla, and stands on a level with the pro- 

 jecting anthers of the short-styled form; but in the latter the 

 stigmas stand rather beneath the level of the anthers in the 

 other or long-styled form, these being enclosed within the tube 

 of the corolla. The pistil of the long-styled form is nearly thrice 

 as long as that of the short-styled, or, speaking strictly, as 

 100 to 39; and the papillse on the stigma of the former are 

 broader, in the ratio of 4 to 3, but whether longer than those of 

 the short-styled, I could not decide. In the short-styled form, 

 the anthers are rather larger, and the pollen-grains are to those 

 from the long-styled flowers, as 100 to 88 in diameter. Fritz 

 Miiller sent me a second, small-sized species, which is likewise 

 heterostyled. 



CoCCOCYPSELrM [SP. ?] (RUBIACE^:). 



Fritz Miiller also sent me dried flowers of this plant from 

 St. Catharina, in Brazil. The exserted stigma of the long-styled 

 form stands a little above the level of the exserted anthers of tho 

 ehort-styled form; and the enclosed stigma of the latter also 

 stands a little above the level of the enclosed anthers in the long- 

 styled form. The pistil of the long-styled is about twice as long 

 as that of the short-styled, with its two stigmas considerably 

 longer, more divergent, and more curled. Fritz Miiller informs 



