HIPPOCASTANE/E. 



325 



the receptacle (h), and surround 

 which is hairy, and has 

 curved stigma (z). The 

 ovary is two-celled, and 

 each cell contains two 

 ovules, but seldom more 

 than one seed ripens. 

 The nut (k) is large, and 

 covered with a shining 

 brown skin, which is 

 strongly marked with the 

 hilum. When put into 

 the ground, the cotyle- 

 dons do not appear in 

 the shape of seed-leaves, 

 but remain in the ground, 

 and the plumule and 

 radicle are protruded as 

 shown in Jiff. 129. The 

 Acorn germinates in a 

 similar manner, as al- 

 ready shown in Jiff. 86 

 in p. 192. 



The flowers of the different species of ^scu- 

 lus vary considerably ; as, for example, in the 

 Scarlet Horse-chestnut (jE.rubicunda), the calyx 

 is tubular (see a in Jiff. 130), and there are but 

 four petals, the upper two of which (b) are nar- 

 rower than the lower ones (c), and have bearded 



Fig. 129. — Yocng plant of 

 Horse-chestnut. 



