262 Professor Henslow's Examination 



Commentary on some parts of the preceding comparison. 



Raceme. Although one of the characters of lutea lies in the 

 very decidedly secnnd position of the flowers, some plants have 

 them disposed in a squarrose manner round the axis. 



1. Calyx. About one half the number of the flowers of the 

 hybrid had five sepals and the other half six, (Plate xvi. II. 1. c.) 

 and the sections given (from d. to 1.) represent the different modes 

 of their arrangement. Figs. d. and h. however appear to be 

 their normal condition in aestivation, the other modifications having 

 probably resulted from inequalities introduced during the expan- 

 sion of the flower. The occasional development of a sixth sepal 

 seems to be no uncommon occurrence in this genus, and I have 

 met with it several times in specimens of lutea and ferruginea. 



2. Corolla. In the colored copies of Professor Lindley's mono- 

 graph, there are two varieties of lutea (see his Plates xxiv and xxv) 

 in which the corolla is tinged with red. One of these (Plate xxiv) 

 he considers to be a hybrid plant. In shape and size it ap- 

 proaches very nearly to the subject of the present paper, but 

 the other (Plate xxv) more closely resembles lutea. In his figure 

 of lutea also, (Plate xxm) there is a little tinge of red in the 

 mouth of the tube, on each side the base of the lip. I have 

 never myself found the slightest tinge of red in any specimen 

 of lutea, though the yellow is deeper and more inclining to 

 orange in the parts above mentioned. If however it should be 

 quite certain that genuine specimens of lutea do occur with a 

 tinge of red in any part of their corolla, this circumstance must 

 considerably modify our speculations as to how far the present 

 hybrid may have derived this color from the male parent. 



