204 



NATURAL HISTORY OF PLANTS. 



Tk/aspi arvense. 



glands at their base. The gynaeceum consists of a short ovary con- 

 taining a few descending ovules, and surmounted 

 by a more or less elongated style, emarginate and 

 stigmatose at the apex. The fruit is a silicule, 

 subelliptical, obovate, obcuneiform, or obcordate, and 

 much compressed perpendicular to the membranous 

 septum, which is hence narrow and elongated. The 

 valves of the siliqua, similarly narrow at the base, 

 taper at the edges into a keel or wing of variable 

 development, 1 which is often prolonged above into 

 a sort of horn, at either side of the base of the more 

 or less persistent style. In each half-cell are 



two or several seeds, descending or subtransverse, glabrous and 



Iberis sempervirens (Candytuft). 



Fig. 2SB. 

 Fruit (f). 



Fig. 288. 

 Flower (|). 



Fig. 289. 



Long. sect, of Sower 



(antero posterior). 



Fig. 200. 

 Flower, perianth removed. 



Fig. 287. 

 Habit, 



Fig. 291. 

 Long, sect, of flower, 

 perianth removed. 



1 Ahscnt in Carpoceras (in Boiss., Diagn. Or., viii. 36; Walp., Ann., ii. 43). 



