88 ON SEEDLINGS 



B. millefoliatus, which has been described and figured bylrmisch, 1 

 belongs to this type. 



Ranunculus arvensis, L. 2 (fig. 127). 



Primary root tapering downwards, rather stout, with very few 

 lateral rootlets ; a number of adventitious roots spring from the base 

 of the hypocotyl and are soon equal to, or stronger than, the 

 primary one ; adventitious roots are also given off from the cotyle- 

 donary node. 



Hypocotyl stout, succulent, colourless, 7 mm. to 1*7 cm. long, 

 glabrous. 



FIG. 127. Ranunculus arvensis. Half nat. size. 



Cotyledons opposite, glabrous, pale green ; petioles channelled 

 above, convex beneath, much dilated at the base, and connate ; 

 lamina oblong, oval, 12 mm. long, 8 mm. broad. 



Stem erect, terete, glabrous, pale green, annual ; lst-4th niter- 

 node undeveloped, 5th more or less lengthened and sheathed by 

 the bases of the petioles. 



Leaves simple, radical and cauline, alternate, exstipulate, ciliate, 

 light green, ultimately glabrous, petiolate ; petioles semiterete, chan- 

 nelled above, slightly pubescent when young, much dilated and 

 sheathing at the base, with somewhat ciliate sheaths. 



No. 1. Rotund-cuneate, five-toothed. 



1 Bot. Zeit. 1865. 2 Irmisch, Bot. Zeit. 1857, taf. ii. 



