REGULAR PELORIA. 223 



erect, regular, five staraened flowers, but these are 

 probably cases of irregular peloria. 



A solitary flower of Pedicularis sylvatica was found 

 by tlie Marquis of Stafford near Dunrobin Castle in 

 Sutherlandsliire, in which the usual ringent form 

 of the corolla was replaced by the form called salver- 

 shaped. There were six stamens, four long and two 

 short. Sir W. Hooker and Mr. Borrer are stated to 

 have found a similar flower in the same locality in 

 1809.1 



The passage of ligulate to tubular corollas among 

 Compositw is not of such common occurrence as is the 

 converse change. I owe to Mr. Berkeley the communi- 

 cation of a capitulum of a species of Bidens, in which 

 there was a transition from the form of Hgulate co- 

 rollas to those that were deeply divided into three, 

 four, or five oblong lobes. These then were instances 

 of regular peloria. 



Fig. 121. Flower of Cattleya marginata. Lip replaced by a flat 

 petal. 



In Orchidacece a similar change is not by any means in- 

 frequent ; in a few, indeed, a regular flower is the normal 



' See Trans. Linn. See.,* vol. x. p. 227. 



