RANUNCULACE.E 91 



No. 18. Similar. 



No. 14. Cuneate, tripartite ; lateral segments unequal. 



Trollius Ledebouri, Rchb., var. polycephalus, Bgl. (fig. 131). 



Primary root slender, normal, soon superseded by strong adventi- 

 tious roots from the base of the leaves and cotyledons. 



Hypocotyl not developed. 



Cotyledons ovate, obtuse, entire, alternately penninerved ; nerves 

 indistinct and seen only by transmitted light, glabrous, bright 

 green above, much paler beneath, petiolate ; petioles semiterete, 

 channelled above, connate for about one-third of their length, much 

 dilated and sheathing at the base, split on one side to allow the 

 egress of the plumule, light shining 

 green, glabrous, 8-11 mm. long ; 

 lamina, 6'5-8 mm. long, 5-5'5 mm. 

 broad. 



Stem herbaceous, forming a peren- 

 nial rhizome which sends up annual 

 flowering stems ; primary internodes 

 undeveloped. 



Leaves simple, radical and cau- 

 line, alternate, exstipulate, petiolate, 



, ,. j -, , , -, ,. , , FIG. 131. Trollius Ledebouri, 



palmati-nerved, and -lobed, reticulate ; v . polycephalus. Nat. size, 

 reticulations best seen in young leaves ; 



light green above, paler or almost glaucous beneath, shining on 

 both surfaces ; petioles terete in the seedling, tapering upwards, 

 light green, often tinged with red below, much dilated and clasping 

 at the base. 



No. 1. Rotund-cordate, palmately five-nerved, and three-lobed 

 or five-lobulate ; middle lobe cuneate, slightly trifid, with obtuse 

 glandular cuspidate teeth ; lateral lobes bifid and slightly toothed 

 with glandular, cuspidate teeth. 



No. 2. Similar. 



No. 3. Tripartite ; middle lobe broadly cuneate with numerous 

 glandular cuspidate teeth ; lateral lobes broader at the base than 

 the middle lobe, slightly bifid with similar teeth. 



Nigella sativa, L. (fig. 132). 

 Primary root slender, tapering, flexuose. 



Hypocotyl erect, terete, glabrous, pale green, 13 mm. long, 1 mm. 

 thick. 



