140 



MINXESOTA BOTANICAL STUDIES. 



N, N, Nn, S 

 I 



N, Nn, S 



L, L, L....N, N, S. 

 In this scheme N and Nn stand for scale leaves, S for spathe 

 and L for foliage leaf. • It is quite clear that the scale leaves 

 indicated in the first row are the remains of the sheathing pet- 

 ioles of the foliage leaves of the preceding season. The apex 

 of the rhizomes is situated 10-15 cm. below the surface of the 

 ground and that portion of the petioles which is covered by the 

 soil persists as decaying remnants into the following spring and 

 early summer as is shown in Fig 3, Plate XXII. 



Text Fig. 3. Transverse diagram of the apex of the rhizome Text Fig. 4. Longitudinal 



of Lysichilon showing leaf arrangement and position of the diagram of the upper part of 



the rhizome of L ysic hi to n 

 inflorescences. showing scheme Of branch- 



ing. 



It is perhaps this confusion of remnants of old petioles with 

 true scale leaves that has given rise to the absurdly erroneous 

 statement about Symplocarpus contained in the following sentence : 

 "Herba magna rhizomate crasso, altero anno folia, altero cataphylla 

 atque inflorescentiam proferente"' (page 150 I.e.). 



