i " n of the various pari;^ <ii ' '' 



ar' . V'ej^.,' p. 218 ; ' Wcbor 



Nal. i.ioi. Tcniu:, 1. u. II "' ^ V^' tphal.,' 1>' 



tabs. C et 7. 



Formation of ascidia or pitchers. In the preceding para- 

 graphs, the formation of tubular or horn-hke structures, 

 fi-ora tlie union of the margins of one organ, or from 

 the coalescence, or it may be from the want of separa- 

 tion of various organs, has been alluded to, so that it 

 seems only necessary no^v, by way of summary, to 

 mention the classification of ascidia proposed by Pro- 

 fessor Charles Morren,^ who divides the structures in 

 question into two heads, according as they are formed 

 from one or more leaves. The following Ust,is arranged 

 according to the views of the Belgian savant, and com- 

 prises a few additional illustrations. Those to which 

 the ! is afl&xed have been seen by the wi'iter himself; 

 the * indicates the more frequent occurrence of the 

 phenomenon in some than in other plants. Those 

 plants, such as Nepenthes, &c., which occur normally 

 and constantly, are not here included. Possibly some 

 of the cases would be more properly classed '>'h1>v 

 dilatation or excavation. 



Ascidia. 

 A. MonophyUxnis. 



1. Sarracenia-like pit<;her8, formed by a single leaf, the etlges of wliich 

 are united for the greater portion of their length, hut are disunited near 

 the top, 80 as to leave an oblique apertui-e. 



*Bru8ica oleracea (.several of the cultivated varieties) ! 



*Tilia europaja ! 



P>largoniuni inqninans ! 

 ' ylea pinnata. 

 i'ha frutioosa. 



I : i.i . itivum! 



T-.i > n Lubcrosus. 



\ 



I 1 sp. 



C :--- ailiqua. 



Trifolium rcpens ! 



Cassia marylandica. 



Ball. Acad. Roy. Brnxellee,' 18U 

 Belg.,' 1852, t. xxx, part-iii, p. 437. 



