CHAP. III. CORDIA. 117 



FORSYTHIA SUSPEXSA (OLEACE.E). 



Professor Asa Gray states that the plants of this species grow- 

 ing 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-styled. 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 diver- 

 gent. This last character, however, may be only a temporary 

 one. There seems to be no difference in the papillose condition 

 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 longest. 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 heterostyled ; for 

 Professor Asa Gray says that although the long-styled form 

 alone grows in the gardens at Cambridge, U.S., the published 

 figures of this species belong to the short-styled form. 



CoiiDIA [SP. ?] (CORDIACEJE). 



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 differences are 

 not well pronounced in the two forms. Linum grandijiorum 

 shows us that a plant may be heterostyled in function in the 

 highest degree, and yet the two forms may have stamens of 

 equal length, and pollen-grains of equal size. In the preser t 

 species of Cordia, the stamens of both forms are of nearly equu! 



' The American Xuturalist,' July 1873. r *'- > 2. 



