308 G. Claridge Druce. 
native localities in Ireland makes it probably of widespread occur¬ 
rence in Western and Northern Britain. The plant is closely 
allied to C. alba Wood, the common white waterlily, and in some 
parts of Germany where they are frequent, the two forms are 
sometimes with difficulty separated. The distinguishing characters 
are the absence of stamens from the upper part of the ovary, 
leaving the neck bare ; the pollen grains are smooth (not tuber- 
culate as in alba), and somewhat larger. The lowest pair of leaf- 
veins are curved, and if produced would cross, inclosing an oval 
area. 
The plant occurs in Finland, Sweden, Poland, Germany, 
Switzerland, Austria, Bohemia, Hungary, Tyrol, Siberia, Kashmir, 
etc., and, attention having been directed to it, will probably be 
found to the more frequent form in Scotland. 
At fCraigga More 16, Co. Galway, Dr. Ostenfeld found it in a 
small Lough west of the road, and independently the writer found 
another on the east side, and also at fRoundstone, Co. Galway 16. 
126. Radicula palustris X sylvestris. A plant which possibly 
has the above parentage, but in facies is very much nearer 
sylvestris, was noticed many years ago by the writer at Perth, on 
the west-side of the Tay 89. On this visit it was also noticed on 
the east-side of the river in some quantity. The plant is sterile 
and the petals scarcely open. 
128. * Barbarea verna Aschers., Perth 89. 
133. Arabis hirsuta Scop., Silverdale, Lancashire 69. 
161. Draba incana L. Monsal Dale, Derby 57, Ben Lawers 
88, frequent. [A sure index to calcareous soils, occurring in shell- 
sand at the sea level in East Ross 106]. 
185. * Sisymbrium orientate L. fClifden, on the railway 
(Schroeter) and on the shores of Galway Bay. 
217. *Brassica alba Koch., on the shores of Galway Bay. 
207. '''Diplotaxis muralis DC. fClifden, on the railway, Galway 
16, and also at Queenstown Junction; a distinct follower of the 
iron-road and thus gaining extension of its area year by year. The 
bare ballast, with few competitors, is its favourite home. 
232. Bursa pastoris [— Capsella Bursa-pastoris~\ Weber var. 
cuneata Druce. Millers Dale, Derby 57. Honley, Yorks. 63. 
Southport, Lancashire 59. Penrith, Cumberland 70. 
239. '''Lepidium perfoliatum L. Alien, Galway Bay. 
293. Viola sylvestris Kit. On the limestone rock, near 
Ballyvaghan,f Co. Clare 9. A specimen of the above species was 
found in flower in this locality on August 23rd. 
294. Viola Riviniana Reichb. A luxuriant cleistogamous form, 
forma villosa (N.W.M.) of this plant (teste E. S. Gregory) was 
noticed at Killarney. 
Var diversa E. S. Gregory, Rep. Bot. Exch. Club, 496, 1910, 
at tBallyvaghan, Co. Clare. 
296. V. canina L. On Ben Lawers (Mid-Perth 88), at an 
altitude of 2,500 to 3,000 feet, this plant occurred as a large cleis¬ 
togamous form, which suggested to Professor Graebner, but since 
his return to Berlin he refers it to canina, a conclusion also arrived 
at by Mrs. Gregory and the writer. 
301 bis. Viola epipsila Ledebour. [This plant, which was 
recorded in the Report of the Exchange Club for 1910, p. 497, as 
