279 



E. cyaneus are also foliaceous, but much smaller, lanceolate, 

 obtuse, opaque, coriaceous, obscurely penninerved and reticu- 

 late, 1*9 cm. long, and about 7'25 mm. broad ; the petiole is 

 only 1 mm. long. 



The fourth type is that of Tilia vulgaris (fig. 223) and 

 others of the same genus. The cotyledons of the former after 

 germination are foliaceous, rhomboid-subtriangular, five-lobed, 

 five-nerved at the base with the two lower pairs of nerves run- 

 ning into the basal pair of lobes, alternately nerved upwards 

 with two strong nerves running into the middle and small pair 

 of lobes, thinly pubescent on both surfaces, ! 5-2*1 cm. long, 

 and 1-7-2-5 crn. from tip to tip of the basal pair of lobes ; the 

 petiole is rather slender, semiterete, and pubescent. Occasion- 

 ally three perfect cotyledons occur, and, corresponding exactly 

 in shape to those of normal seedlings, indicate that the 5-lobed 

 character is of long standing and has become thoroughly fixed 

 by heredity ; otherwise if they depended directly upon the con- 

 formation of the seed for their peculiar shape, the presence of 

 three would have caused some modification of the normal type. 



The Tiliacea) include some 330 species, dispersed over the 

 whole world, most numerous within the tropics of both hemi- 

 spheres, less so in temperate regions both north and south 

 of the equator. 



Berrya Ammonilla, Roxb. 



Fruit a capsule, subglobose, three-celled, each cell one- to two- 

 seeded ; dehiscing loculicidally by three valves. 



Seed obovoid, glabrous, pale brown and often with darker brown 

 stripes from the hilum upwards ; seed-coat double testa thin, 

 membranous, easily separable from the tegmen which is much 

 thicker, crustaceous, deeper brown, much thickened and hardened 

 at the chalaza where it is nearly or quite black ; micropyle and 

 hilum contiguous, basal ; raphe ventral, separable from the testa ; 

 chalaza apical. 



Endosperm copious, colourless, and shrunk away from the 

 dorsal aspect when dry, white when moist. 



Embryo central, curved or bent above the middle owing to its 

 being slightly longer than the endosperm, pale yellow ; cotyledons 

 cordate-orbicular, five-nerved from the base, with a few short altern- 

 ate nerves proceeding from the midrib, broad, flat, closely adpressed 

 face to face, straight until they come in contact with the thickening 



