Chap. III. COKDIA. 117 



ent known, are heterostyled, and all inhabit aquatic or sub- 

 aquatic stations. 



FORSTTHIA SUSPENSA (OlEACE^). 



Professor Asa Gray states that the plants of this species 

 growing in the Botanic Gardens at Cambridge, U. S., are 

 short-styled, but that Siebold and Zuccarini describe the 

 long-styled form, and give figures of two forms ; so that 

 there can be little doubt, as he remarks, about the plant 

 being dimorphic* I therefore applied to Dr. Hooker, who 

 sent me a dried flower from Japan, another from China, 

 and another from the Botanic Gardens at Kew. The first 

 proved to be long-styled, and the other two short-stjrled. 

 In the long-styled form, the pistil is in length to that of the 

 short-styled as 100 to 38, the lobes of the stigma being a 

 little longer (as 10 to 9), but narrower and less divergent. 

 This last character, however, may be only a temporary 

 one. There seems to be no difference in the papillose con- 

 dition of the two stigmas. In the short-styled form, the 

 stamens are in length to those of the long-styled as 100 to 

 66, but the anthers are shorter in the ratio of 87 to 100 ; and 

 this is unusual, for when there is any difference in size 

 between the anthers of the two forms, those from the 

 longer stamens of the short-styled are generally the long- 

 est. The pollen-grains from the short-styled flowers are 

 certainly larger, but only in a slight degree, than those 

 from the long-styled, namely, as 100 to 94 in diameter. 

 The short-styled form which grows in the Gardens at Kew 

 has never there produced fruit. 



Forsythia viridissima appears likewise to be hetero- 

 styled ; for Professor Asa Gray says that, although the long- 

 styled form alone grows in the gardens at Cambridge, TI. S., 

 the published figures of this species belong to the short- 

 styled form. 



Cordia [sp.?] (Oordiace^.) 



Fritz Miiller sent me dried specimens of this shrub, 

 which he believes to be heterostyled ; and I have not much 

 doubt that this is the case, though the usual characteristic 



' The American Naturalist,' July, 1873, p. 422. 



