HERBARIUM. rj07 



preserved. \L\cn in spreadin;; plants between 

 papers, wu .should rclVani iVoni that precise 

 and arlilici-al disposition of their branches, 

 leaves, aud other parts, which takes away 

 from th( ir natural aspect, except Tor the [)ur- 

 pose of displaying the internal parts of some 

 one or two of their ilowers, for ready ob- 

 servaiion. 



After all we can do, jilants dry \ery varl- 

 ouslv. I'he blue colours of their flowers <ie- 

 neraily fade, nor are reds always permanent. 

 Yellows are much more so, but wry few- 

 white flowers retain their natural aspect. The 

 Snowdrop and Paniassia, if well dried, con- 

 tinue white. So.'iie greens are much more 

 permanent than others ; for there are some 

 natural families whose leaves as well as tlo^vers 

 turn aimosi black by drying, as Mtlampj)- 

 ruf/iy jiarhid, and their allies, several V/il- 

 lovvs, and most of the Orcliidec^. The Heaths 

 and Firs in general cast off their leaves be- 

 tween papers, which appears to be an effort 

 of the living principle, for it is prevented by 

 immersion of the fresh specimen in boil- 

 jng^ water. J^'andina clow est ica, a Japanese 

 ^hrub, lately introduced among us b^' L^f^y 



