CHAP. CV. 



CORYLA X CE/T\ QUE'RCUS. 



1939 



cate, depressed. Cup tuberculated. A large tree, with brownish bark ; a native of Sumatra. 

 Branches smooth. Leaves alternate, short-petioled, acuminate, attenuated to the petiole ; nerves 

 well marked, and reddish beneath, 6 in. to 8. in. long. Stipules small, linear. Male spikes numerous 

 panicled, terminal ; and, from the axils of the upper leaves, which are crowded round the thickened 

 extremity of the branch, slender, hoary; flowers sessile, aggregated. Female spikes at first termi- 

 nal, becoming afterwards lateral by the shooting up of the branch : flowers numerous, dense, sessile. 

 Males : calyx 6-parted, segments acute; stamens 15 — 20. The centre of the flower is occupied by 

 a densely villous disk. Female : calyx rugose, turbinate, umbilicate ; ovary 3-5 celled ; each cell con- 



taining 2 ovula, attached by a thread to its summit. Acorns large, depressed, umbilicate, with a 

 short mucro. Cup flat, embracing the nut for about half its height ; nearly 1 in. in diameter ; rough, 

 with angular imbricated tubercles, which are large towards the base, and become small towards 



C k 3 



