RUBIACE.E 



71 



Stem. 1st and 2nd internodes 2 cm. long, resembling the 

 hypocotyl. 



Leaves entire, lanceolate-elliptic, alternately incurvinerved and 

 reticulate, glabrous, evergreen, subcoriaceous, deep green above, 

 paler beneath ; petioles very short, flattened above ; stipules inter- 

 petiolar, connate, very 

 persistent, with a 

 broad base and one 

 or both tips free and 

 more or less acumi- 

 nate, closely applied 

 to the stem. 



Morinda tinctoria, 



Boxb. 



Hypocotyl erect, 

 flattened, glabrous, 

 short, about 5 mm. 

 long, light green or 

 almost colourless. 



Cotyledons ob- 

 tusely ovate, glabrous, 

 shortly petiolate, about 

 1'5 cm. long by 1 

 cm. wide, dull green, 

 entire ; midrib with 

 numerous ascending 

 veinlets, as in the 

 leaves. 



Stem herbaceous, 

 erect, quadrangular, 

 ultimately woody, glabrous, light green ; Istinternode 1-2 mm. long. 



Leaves entire, linear, acute, shortly petiolate or subsessile, with 

 connate interpetiolar stipules, glabrous, dark green above, lighter 

 below ; midrib prominent with ascending veinlets. 



Psyehotria sp. (fig. 437). 



Primary root long, tapering, much branched. 



Hypocotyl erect, terete, 2-5-3'5 cm. long, glabrous. 



Cotyledons broadly ovate, obtuse, petiolate, alternately incurvi- 

 nerved, somewhat coriaceous, glabrous, shining, stipulate ; lamina 

 9-12 mm. long, 9-11 mm. wide at the base ; petiole flattened above, 

 3 mm. long ; stipules interpetiolar and united so as to form one ovate, 



FIG. 486. Coffea arabica. Half nat. 



