I9I4 
RiDDKLSDKLL. — TIclosi iad'n.un Moorci. 
9 
ception to this feature (wliicli is in marked contrast with 
the character of the ' parents '), (^xcept. perhaps, in some of 
the smaller forms. 
5. Intermediate position, in many respects, between the 
' parents,' with occasional decided approach in part or 
whole towards one or the other end of the chain. In some 
points it is, of course, not intermediate at all, e.g., it has 
made for itself a specialised method of propagation, which 
entirely compensates for the disadvantage of sterility. 
6. I know of no case of its occurrence, except where both 
parents exist, either in the near distance, or immediate 
vicinity. But I have not been able to work out this point 
at all fully. 
In giving an account of the distribution of Helosciadium 
X Moorci, as T beheve we ought to call it, it is interesting 
to note that there seems to be no record of its occurrence 
except in Ireland and England (and ? Wales). Dr. Gliick, 
in spite of his unrivalled knowledge of aquatic plants, 
found it a novelty on his visit to these islands in loii. 
The following account is \Try largely the work of Mr. 
Praeger. 
Ireland. 
8. T.imerick .. .. Castleconnell, on R. Shannon, coll. R. LI. 
Praeger. 
9. Clare . . . . Ennis, by the R. Fergus, 1804, J. T. Mackav. 
Glanquin, 1905, R. LI. P. 
13. Galway S.E. . . Portumna and Woodford, 1883, K. F. cS: \V. R. 
Linton. 
17. Galway N.E. . . Tuam, on R. Clare, 1S99, J^. LI. P. 
21. Dublin .. .. Royal Canal, Lucan, 18(^4, 1^. LI. P. 
22. Meat]\ . . . . 1^. Boyne, D. Moore. 
(This record should read so. ]\Ir. Praeger tells mc that " no 
part of the Boyne lies in Cavan.") 
Navan, 1900, R. LL P. 
33. Fermanagh . . L. Erne, 1857, Moore. 
34. S. Donegal . . N.W. of J^allyshannon, Hart's Flora oj Donegal 
37. Armagh . . . . Maghery, on R. Blackwater, 1892, R. LI. 1*. 
Marsh near ^Morrow's Point, L. Neagh (K. LI. 
v.), Cyb. Hih. 
Mouth of R. Closet, (R. LI. P.), Cyb. Hib. 
38. Down . . . . R. Quoile, and Saul, Downpatrick, 1880 and 
1886, S. A. Stewart ; and 1887 and 1890, 
R. LI. P. 
A3 
