CRUCIFEPwE 171 



First leaves simple, cauline, alternate, pinnati-fid or -partite ; 

 segments two, linear, acute, hairy. 



Biscutella didyma, L. 



Primary root tapering downwards, with numerous lateral 

 rootlets. 



Hypocotyl short, tapering sharply downwards, almost colourless, 

 glabrous, from 1-2 mm. long. 



Cotyledons fleshy, broadly oblong, obtuse, entire or very minutely 

 crenate at the apex, rather unsymmetrically divided by the midrib, 

 shortly petiolate, glabrous, green, indistinctly pinnatinerved like 

 the leaves, cuneate at the base. 



Stem with primary internodes undeveloped. 



First leaves simple, radical, alternate, petiolate, subrotund or 

 oblong, obtuse, crenate, hairy, green, pinnatinerved ; petioles rather 

 short, hairy, rather flat and channelled on the upper side. 



Iberis corifolia, Sweet. 



Primary root tapering downwards and branched. 



Hypocotyl erect, terete, glabrous, 14-18 mm. long. 



Cotyledons shortly and broadly oval, obtuse, entire, petiolate, 

 glabrous ; lamina opaque with an indistinct midrib, 10 mm. long by 

 7 mm. broad ; stained purple beneath, petiole 4-4*5 mm. long, 

 slightly channelled on the upper side. 



Stem herbaceous or subshrubby, erect in the seedling stage, 

 afterwards procumbent, scabrous, otherwise glabrous ; 1st internode 

 4-5 mm. long. 



Leaves simple, entire, cauline, alternate (1st pair opposite or 

 nearly so), petiolate, narrowed to the base, glabrous, one-nerved, 

 deep green, all narrower than the cotyledons. 



Nos. 1 and 2. Obovate-spathulate, obtuse. 



Nos. 3-5. Spathulate, obtuse. 



Nos. 6-10. Linear, obtuse. 



Iberis Lagascana, DC. 



Hypocotyl 5-8 mm. long. 



Cotyledons oval-oblong, fleshy, rather unsymmetrical. 



Stem with primary internodes undeveloped. 



Leaves pinnatifid, cauline, alternate, glabrous except on the 

 petioles, light green, pinnatinerved ; lobes entire, obovate, obtuse ; 

 petiole channelled on the upper side, with a few scattered hairs. 



