l'^<i^ s. MATSUDA. 



(jf cells. The cuticle is sotnetime.s well developed, as in flliciu}ii, 

 Driiiiij.s, Troclioilendrou, and many species of Magnolia. Eindermal 

 h iirs are found only in the two genera, Michelia and Magnolia und in 

 the latter genus are almost absent in some species. 



2. Cork. — This structure presents no peculiarity. As with 

 m;iny other Dicotyledons, cork is here developed inunediately beneath 

 the epidermis. In Euptelcea it is conspicuous fnjm the size of its cells. 



3. Hypoderma. — This is totally wanting in JlUciuin, Vriiiiij.s, 

 Kadzvra, and Scliizandra but present in all the other genera. When 

 present, it consists of a layer of thick-walled and closely packed paren- 

 chymatous cells (PI. V, Fig. 22, hp), and in some species of Ma(jnolia, 

 as M. gmndiflom, hjpoleuca (PI. V, Fig. 28, ///>), &c., these cells are 

 transformed into scleroblasts. 



4. Secretory Reservoirs. — Two kinds of these are found, resin- or 

 oil-sacs and crystal-containing sacs, the latter chiefly found in Eiiptekea 

 (PI. II, Fig. 2) and Ccrcidiphyllmn (PI. II, Fig. 5). The crystals are 

 of calcium oxalate in both genera ; 1jut in Euplekm they exist in the 

 sac as an aggregate and are confined to the outer cortex, while in 

 Cercidiplryllwii tliey are not aggregated, and the sacs containing them 

 exist in the phloem, as well as in the outer cortex. In Schizandra 

 crystal-containing sacs are confined to the leaf (petiole and blade). 

 Ilesin-sacs universally occur in the external cortex of Ma<jnoliea', and 

 in many cases are found in the phloem, and sometimes e^'en in the 

 pith. Cells containing oily substances are also met with in the 

 extern-.d cortex of Schizandra (PI. IV, Fig. 14, CD). Resin-sacs are 

 also present in Driuiys and iUicium Tashiroi, but absent in lUiciina 

 reliyiosiun. Trochodendron is entirely destitute of any kind of reser- 

 voirs. 



5. Scleroblasts and Tricliohlasis (in the external cortex). — The latter 

 are simply a modified form of the former, lîoth forms of cells are 



