120 



s. MATSUDA. 



iniicli from tliat of the .stem, except thnt pith is ahsent. The scleren- 

 clivmntous ring ec^iitaiiis hoth sliort and elongated elements. In the 

 voiinu' root, hairs are copiously found on the epidermis. The arrange- 

 ment of xvlem-plates seems to 1)elong to the diarch type (PI. IT, 

 Fiii'. 4, A). As the root becomes a little older the two xylem-plates 

 wliich WYO o]^])osite in tlieir ])osition hecome united, thus forming an 

 ellijitical mass of wo<^d (PL IT. Fig. 4, 1)). The enchjdermis remains 

 cellulose ;»s long as it exists. 



Cercidiphyilum. 



Of this geiuis T examined a single species, C. /(iponicinih Sieh, et 

 Zucc. Tlie ])lant is found in tlie mountainous parts of this comilry. 

 Tt attains a great height ;ind yields a valuable tindx'r. Ft is not 

 aromatic though tlie o])]>osite statement is made by some authors.' 



,S'^';//. — The tissue elements of this ]>lant are very small in size ; 

 the ('(mipactness of texture of the wood is owing to this fact. 

 The epidermis is early shed, so that except in very young 

 shoots it is compleielv absent. The cork is very compact like 

 the other tissues. The hypodermal layer is present undei* the cork. 

 Cells containing prism;)tic crystals of calcium oxalate are abundantly 

 found l)oth in the outer c(-)rtex and in the ])hlo('m, and are es])ecially 

 munerous in the ])hloë,m i-ays (PL FF, I^ig. 5). 'I'he occurrence of 

 these crvstals is so common that I fourid them in vari(nis specimens 

 collected in different seasons. 



The groups of sclerenchymatous fibres are well developed and 

 form bands alternating with the soft bast ; but there does not exist a 

 continuous sheath of sclerencliyma enclosing fhe fibro- vascular bundles. 

 Sieve- plates are seen iti the phloem, though not very distinctly. The 



1. Bâillon, Natura! Histori/ of I'laiit.f, (translated from thcFrench). 

 En<j,-lt'r and Pi-antl, T'ii' iKiJiirliclii'ii Pilctn-cii/diiiilii'ii. 



