70 



ON SEEDLINGS 



peltate disc, covering over the concavity of the seed ; micropyle 

 inferior. 



Endosperm copious, cartilaginous and very hard when dry. 



Embryo central in the endosperm, curved longitudinally and 

 also transversely in conformity with the shape of the seed ; 

 cotyledons triangular-ovate, obtuse, entire, thin ; radicle cylindrical, 

 obtuse, pointing to the micropyle at the lower side of the hilum, 

 longer than the cotyledons. 



Pavetta madagascariensis, ? AiLct. (fig. 435). 

 Hypocotyl woody, erect, terete, glabrous, scabrous, pale green, 

 1-1 '5 cm. above the soil. 



Cotyledons semiorbicular or 

 oblate, entire, glabrous, shining, 

 coriaceous, horizontal, petiolate, 

 penninerved ; lamina 1 - 1 cm. long, 

 l - 5 cm. wide; petiole 2 mm. long, 

 flattened above, convex beneath ; 

 stipules short, triangular, acute, 

 interpetiolar. 



Stem woody, erect, terete, pubes- 

 cent, scabrous, green ; 1st internode 

 6 mm. long ; 2nd 3 mm. 



Leaves entire, glabrous, shining, 

 deep green above, paler beneath, 

 alternately penninerved, coriaceous ; 

 stipules interpetiolar, ovate, acute, 

 connate in one piece. 



FIG. 435. Pavetta madagascariensis. 

 Nat. size. 



First and second pairs elliptic -oblong, obtuse. 



In Pavetta speciosa the cotyledons are rotund-cuneate ; lamina 

 1 cm. long, 1-1 cm. wide. 



Coffea arabica, L. (fig. 436). 



Primary root a long taproot, woody, with a great many branched , 

 greyish, fibrous lateral rootlets. 



Hypocotyl woody after a time, about 6 cm. long, 2-3 mm. thick, 

 round, with a greyish-brown coriaceous rind bursting open in broad 

 longitudinal fissures, and showing the green layer below. 



Cotyledons sessile, frequently three in number, about 3'5 cm. long, 

 4*5 cm. wide, oblate, apex obtuse, margin sinuate, with five sunk 

 nerves and distinctly reticulate, coriaceous, glabrous and shining 

 on both sides, dark green above, paler beneath. 



