30 
The Scottish Naturalist. 
from Brousta Loch. It bears considerable resemblance to deep- 
water states of /*. polygonifolius ; but differs from that species in 
the shape, and texture when fresh^ of the submerged leaves ; and 
also in producmg hardly any floating leaves when growing in stilly 
shallow water. The few floating leaves produced are much thinner 
and less coriaceous. It has been referred with considerable con- 
fidence to P. plantagineiis ; while P. natans x heterophylhis has 
also been suggested. My own opinion is expressed above as to 
the origin of the plant ; but what it really is must at present be 
held to be uncertain. 
P. pusillus L.— W. Pools on the Cloka Burn, not in fruit, 
but apparently the typical plant, and considered probably to be 
so by Mr. Bennett. 
X Var. rigidus Ar. Benn. — W. Bardister Loch, plentiful. Mr. 
Bennett reports : " the same as Dr. Trail's Orkney plant. Your 
specimens are small, and the leaves are shorter than in the full- 
grown Orkney plant." 
Zannichellia polycarpa Nolte.— W. Bardister Loch ; the 
second locality recorded for the county. 
X Scirpus multicaulis Smith. — W. Bogs on the hills 
between Burga Water and Snarraness Voe. 
X S. fluitans L. — W. Cloka Burn, a mile above Walls ; 
Burga Water; burn running from HouUma Water into Grass 
Water. 
Oarex rigida Good. ? — W. An interesting Carex occurred 
plentifully on a holm in a loch on Gibbie Law's Burn. Mr. A. 
Bennett has considered it to be probably a lowland form or state 
of the above, an opinion in which I concur. Whether it is 
referable to any named variety, or whether it be a variety or 
merely a state due to situation, must remain open questions for 
the present. I cannot give the exact altitude of the station, but 
it is a little under loo feet. I have never before met with the 
species at so slight an elevation, although on the north side of 
Roeness Hill a slender form ( C. hyperhorea Drejer?) occurs at an 
elevation of 300 or 400 feet. 
I am quite unable to concur in the views expressed by Prof. L. 
H. Bailey, who {Journ. Bot,^ 1890, p. 171) unites Carex rigida 
and Carex Goodenovii, regarding them as being only varietally 
distinct; and I submit that Dr. Boott (cited by the Professor) has 
not " shown " this to be the case. 
