69 
CALLITRICHE. 
383. C. verna, Linn. Native. British. 
384. C. platycarpa, Kutz. Native. British. 
Pools and ditches; frequent. Plentiful in the ditches at Askham 
bogs, near York, and at other localities. 
385. C. pedunculata, LG. Native. British. 
Lakes and ponds ; not unfrequent. Probably the stations mentioned 
in the Flora under C. autumnalis refer to this species. 
386. C. autumnalis, Linn. Incognit. 
CERATOPHYLLUM. 
387. C. demersum, Linn. Native. English? 
The localities in the vicinity of the Foss, at York, mentioned under 
C. submersum in the Flora refer to this species. 
388. C. submersum, Linn. Incognit. 
The locality of “ponds at Newburgh” rests upon the authority of 
the Rev. Archdeacon Peirson. This species so much resembles the 
preceding, that it will be safest to wait till it is confirmed before 
receiving it with confidence. 
OEDEE XXVII. LYTHEACEiE. 
LYTI1RUM. 
389. L. hyssopieolium, Linn. Incognit. 
This species was collected long ago in the vicinity of Harrogate, by 
the Rev. Archdeacon Peirson (B. G. 692), but I am not aware that 
it has since been found within the limits of the county. 
390. L. Salicaria, Linn. Native. English. 
PEPLIS. 
391. P. Portula, Linn. Native. British. 
OEDEE XXIX. CUCUEBITACEiE. 
BRYONIA. 
393. B. djoica, Linn. 
Native. 
English, 
