CBUGIFEBJE. 



205 



wingless ; the cotyledons are accumbent. TIdaspi comprises 

 annual and perennial herbs, glabrous or glaucous, rarely pubescent. 

 Some twenty-five species are known 1 inhabiting the temperate, alpine, 

 and arctic regions of the Northern Hemisphere, but rare in Australia 

 and South America. The so-called radical leaves are small, entire, 

 dentate, usually approximated into rosettes ; the cauline are oblong 

 hastate, auriculate at the base. The flowers 2 form a more or less 

 elongated, often corymbiform, terminal ebracteate raceme. 



Adanson made TIdaspi the type of one of his sections of this order, 

 characterized by the silicule with a very narrow septum and carinate 



Ileris st mpervii < ns. 



Fig. 293. 

 Fruit dehiscing (±). 



Fig. 292. 

 Diagram. 



Fig. 294. 



Seed (';). 



Fig. 295.] 

 Embryo. 



valves. Hence this series differs from the Lunariece chiefly in the 

 narrowness of the septum, which is perpendicular to the plane of the 

 valves, instead of being parallel with them. The first contains fourteen 

 genera, which, like TIdaspi, have usually accumbent cotyledons. The 

 subseries has often been named Iberidinece, a name which we adopt, 

 after the genus Iberis, which may be defined as TIdaspi with an irregu- 

 lar corolla. The remaining twelve genera are Teesdalia , Iberi della, Hut- 



1 Reichb., Ic. Fl. Germ., ii. t. 4. — 13enth., Sep., i. 155; ii. 758 ; v. 37; Ann., i. 37; ii. 

 Fl. Au-.! i -al., i. 87.— Boiss., Fl. Or., i. 321.— 35; iii. 815; iv. 201; vii. 165. 

 Gren. & Godk., Fl. de Fr., i. 14.2.— Walp., " White, pink, violet, or purple. 



