126 
ZANNICIIELLIA. 
1136. Z. palusteis, Linn. Native. British. 
Ditches and slow streams ; frequent. Z. pedicellata, Reich., 
placed as a variety of this species in Babington’s Manual and the 
London Catalogue, but considered as a distinct species by Fries 
and other continental authors, has been found in salt water 
ditches near Hull — C. C. Babington; and in the neighbourhood 
of Middlesborough — W. Mucld. 
ZOSTERA. 
1137. Z. maeinA, Linn. Native. British. 
ORDER LXXXII. ARACE2E. 
LEMNA. 
1138. L. minoe, Linn. 
1139. L. gibba, Linn. 
1140. L. polyehiza, Linn. 
1141. L. teisulca, Linn. 
Native. 
Native. 
Native. 
Native. 
Ponds and ditches ; not unfrequent. 
British. 
English. 
English. 
British. 
1142. A. maculatum, Linn. 
ARUM. 
Native. 
1143. A. Calamus, Linn. 
ACORUS. 
Native. 
English. 
English. 
SPARGANIUM. 
1144. S. minimum, Fries, Native. British. 
Ditch at Pickhill, near Bedale — T. Simpson. I have no means of 
ascertaining whether the localities mentioned in the Flora belong 
this species or the true natans. One of these (probably S. mini- 
mum) also occurs at Buttercram.be and other places near York — 
O. A. Moore. Most likely both will be found in the county even- 
tually. 
1145. S. simplex, Hnds. 
1146. S. EAMOSUM, Huds. 
Native. 
Native. 
British. 
British. 
