224 s. MATSUDA. 



in the stem ov leaf, and a[)|)n)u<jhes that of tlie triche )l)lastfs existinfj;' 

 in the external cortex of some species of M(((jNoli(i. The hy})odernia 

 is al)sent. In the cortex of tlie young root there is found a nundjer 

 of cells with thick walls, sHghtly lignified (PI. IT[, Fig. <S. f-.s). 

 Some of these cells are short and others are elongated. T'li^y are not 

 the vouno- sta2'e of the sclerenchymatous elements found in 

 the older root, and are destined to be soon shed off with the paren- 

 chymatous cells among which they are scattered. The true tricho- 

 blasts come into existence at a much later time, while the sclerenchy- 

 matous fibres do not appear at all in the roc^t, or only in s(jmewhat 

 old roots. The arrangement of the xylem-plates is of the diarcli type 

 (PI. Ill, Fig. 8). The endodermis and pericambium are not well 

 marked in the present species (PI. Ill, F'ig. 8). 



Tribe II. lUicieae. 



Two genera, JUiciioii and Drimijs, were examined in this tribe. 



Illlcium. 



In this genus I examined, two species ; namely, I. reliijiosdDi, 

 Sieb, et Zucc, and /. Tasliiwi, Max. The former is a small tree with 

 aromatic odour, and widely distributed in Jap:in. 7. Tasliiroi was 

 discovered a few years ago in Iliukiu or Loochoo by a Jaj)anese 

 botanist, Y. Tashiro, whose name the plant bears, and 1 examined 

 only a dried specimen of it. 



Sleiii. — The epidermis has no peculiarity and lias no appendages. 

 The cuticle is very well developed, and stria', perpendicular to the 

 cuticular surface, and corresponding to the limits of the epidermal 

 cells, are distinctly seen, as in Trochodciulruii. Tn stems a little older 

 cork is developed immediately beneath the epidei-mis. In the outer 

 cortex there exists no layer of cells that can represent the hypoderma. 



