CONVOLVULACILE 



279 



micropyle, following the outline of the basal and dorsal aspect of 

 the seed. 



Seedling (fig. 540). 



Primary root a short, succulent taproot, with a few branched, 

 colourless, fibrous lateral rootlets. 



Hypocotyl herbaceous, about 6 cm. long, 1 mm. thick, two- 

 furrowed, from the decurrent bases of the petioles of the cotyledons, 

 glabrous, bright green. 



Cotyledons very short but trans- 

 versely linear, 3'5-5 cm. long from 

 tip to tip, the broadest part about 

 4 mm. and the middle 3 mm. wide, 

 cordate at the base, rather obtuse at 

 the apex of each lobe, with a midrib 

 1 mm. long, giving off two strong 

 lateral nerves on each side running 

 parallel for some distance, and the 

 upper one to the apex of the lobes, gla- 

 brous, pale green in the earlier stage, 

 with undulate entire margin, thin, 

 somewhat persistent. 



Stem herbaceous, suberect, fur- 

 rowed, glabrous, shining, light green ; 

 the first few internodes about 5 mm. 

 long, 1 mm. thick. 



Leaves uni- to bi-pinnatisect, deep 

 green, glabrous, with slender linear 

 segments. 



No. 1. About 3'5 cm. long, 2 cm. 

 wide, with a glabrous petiole 7'5 mm. FlG- 

 long and -75 mm. thick, distinctly pin- 

 natisect, with the lowest pair of segments shortly bipinnatisect, the 

 other three pairs with the terminal segment narrowly linear, about 

 1-5 cm. long, 1-25-1-5 mm. wide, acuminate, glabrous, dark green, 

 with sunk midrib. 



No. 2. Similar, with five pairs of segments, most of which are 

 bipinnatisect. 



Ipomcea hispida, Eoem. et Schult. (fig. 541). 



Primary root long, with a few branched white fibres. 



Hypocotyl herbaceous, suberect, about 6 cm. long, 2 mm. thick, 

 terete, glabrous, with decurrent lines from the base of the cotyledons, 

 green with a light purplish hue. 



ia Quamodit. 



Nat. size. 



