UMBELLIFER/E 



29 



Smyrnium perfoliatum Mill. (fig. 408). 



Primary root very stout, forming a long tapering tap root, 

 biennial. 



Hypocotyl undeveloped. 



Cotyledons oblong-elliptic, emarginate, obtuse, generally un- 

 equal-sided or subfalcate, with long petioles, trinerved from the 

 base and finely reticulate, with the lateral 

 nerves becoming incurved and uniting with 

 the midrib close to the apex, glabrous, 

 light green above, paler beneath, shining 

 on both surfaces; lamina l'8-2'4 cm. long, 

 8'5-ll mm. wide ; petioles 6-10 cm. long, 

 connate into one terete piece for 5-5-7-5 cm. 

 of their length, split a little way at the 

 base to allow the plumule to emerge, free 

 in the upper part, semiterete and slightly 

 .channelled above, glabrous, dull brownish- 

 green. 



Stem developed when about to flower ; 

 primary internodes undeveloped. 



Leaves simple, trisect, ultimately ter- 

 nately pinnatisect, radical and cauline, alter- 

 nate, exstipulate, petiolate with the principal 

 nerves opposite or subopposite, the others 

 alternate, all ascending, glabrous, shining on 

 both surfaces, bright green above, paler 

 beneath ; petioles semiterete, channelled above, glabrous, shining, 

 dilated and sheathing at the base. 



No. 1. Pinnately trisect; lateral segments broadly cuneate, 

 unequal at the base on the posterior side, obtusely dentate-serrate 

 on the upper half ; terminal segment equal at the base, otherwise 

 like the lateral ones. 



Bupleurum fruticosum, L. 



Primary root long, tapering, flexuose, colourless, with a few 

 lateral rootlets. 



Hypocotyl erect, terete, glabrous, purplish -brown or green 

 1-2 cm. long. 



Cotyledons linear, obtuse or subacute, petiolate, glabrous, deep 

 green with ascending petioles and a spreading or horizontal lamina, 

 2*4 cm. long including the petiole, 3 mm. wide about the middle of 

 the lamina, slightly tapering to each end. 



?1 



FIG. 408. 



Smyrnium perfoliatum. 

 Half nat. size. 



