186 GUERNSEY. 
Potamogeton crispus, L. Curled Pondweed. 
Native. First record: Babington, 1839. 
Rather common in streams and meadow drains at the Vale and 
St. Sampson’s, from Ivy Castle northwards; rare elsewhere. Mill- 
pond at King’s Mills and stream at Grande Mare. Babington found 
this plant at Paradis, and also ‘in the millstream near Park Street, 
St. Peter’s Port.’ This millstream was long ago covered in and 
built over. 
Potamogeton pectinatus, L. fennel-leaved Pondweed. 
Native. First found: Gosselin, 1788. 
Rare. Found by Mr. Andrews in a ditch in the Vale Road in 
1899, and abundantly in the Vale pond the following year. 
There is a specimen of this plant in Gosselin’s herbarium labelled 
Potamogeton marinum, a name which is not in his list. I am not 
sure what species he meant by ‘ Potamogeton compressum or small 
branched Pondweed with a flat stalk.’ 
Ruppia rostellata, Koch. Tassel-grass. 
Native. First found: Gosselin, 1788. 
Rare. Grows in brackish pools and ditches in the lowlands. 
‘Pool at Mare de Carteret. Ditches by the Vale pond. Ditches at 
Claire Mare, near Perelle. In F/. Sar. this plant is given under 
the old aggregate name A. maritima, and a specimen from ‘ Mr. 
Lefebvre’s Saltpans’ in Gosselin’s herbarium is so labelled. It is 
possible, however, that the segregate maritima also occurs here. 
The Claire Mare plant approaches it in the somewhat inflated sheaths, 
short fruit-beak, and apparently later fruiting: but the peduncles are 
nearly straight, not spirally twisted. 
Zannichellia palustris, L. Horned Pondweed. 
Native. First found: Gosselin, 1788. 
Rather rare. Roadside pool near the Hermitage, Vale. Ditches 
by the Vale pond. Pool by Fort Doyle. Pool towards Fort Le 
Marchant. Mill-pond below St. Peter’s Church. I have not been 
able to separate clearly the different forms of this very variable 
species. The var. pedicellata, Fr., seems to be the most frequent, 
and probably the others may be referred to var. cyclostigma, Clav., 
and var. vepens, Boenn., described by Corbiere (Vouv. Fi. Worm., 
Pp. 545), these three forms being, he says, ‘presque également 
répandues dans la région maritime.’ In 7. Sara. the var. pedun- 
culata, Reich., is recorded as found by Babington ‘in brackish water 
at St. Sampson’s near the Saltpans; a larger form occurs in a ditch 
in the Braye du Vale by the road from St. Peter’s Port to Vale.’ 
Mr. Andrews reports having found Z. pedunculaza, Reich., in a small 
pool near Grandes Rocques, and also in the pool by Fort Doyle. 
There is a specimen in Gosselin’s herbarium, but without locality. 
The plants belonging to this genus require further study. 
