3-M DR. HOOKER ON THE DISTRIBUTION OF ARCTIC PLANTS. 
J. lampocarpus, Ehr., is articulatus a and |3 of Linnaeus, fide Koch. E. Meyer unites 
it. According to Eries, it is not Scandinavian. 
J. alpinus, Vill. I have followed E. Meyer, Eries, and Koch, in keeping this distinct, 
though Kunth unites it with articulatus, and in the ' Elora Boreali- Americana ' it is put 
as a synonym of uliginosus. 
J. compressus, Jacq., is the same with bulbosus, L. 
J. Bothnicus, Wahl., is a synonym of Gerardi, according to Koch and E. Meyer, as is 
ccenosus, Bich. fid. Fries and E. Meyer : the latter observes that J. Gerardi always grows 
in salt marshes, and compressus never. 
J. atrofuscus, Rupr., is reduced to a synonym of Gerardihy~E. Meyer in Ledebour, El. 
Ross. 
Carex. I am indebted to Dr. Boott for revising the list of Carices, which, as it stands, 
embodies his views as to the specific limits of the Arctic forms and their distribution. 
Scirpus Olneyi, A. Gray. This appears to me nothing but a very slight variety of S. 
triqueter. 
Eriophoktjm Chamissonis, C.A.M., is regarded by Eries as identical with capitatum. 
E. Scheuchzeri, Hoppe (capitatum. Host.), is distinguished fr 'om capitatum by the leaves 
scabrous at the margin, subglobose spike, and stoloniferous roots ; it is not Scandinavian, 
but found in Arctic Greenland. 
E. russeolum, Er. Kept distinct by Eries, from its opake mucronate scales and yellow- 
brown setae. It is found only in Lapland and West Einland. 
E. latifolium, L. I find it quite impossible to distinguish gracile, angustifolium, and 
polystachyum by any definite or constant characters, and revert to the Linnsean opinion 
that all are forms of one, in which Bentham concurs. 
Gramine^e. — This list has been twice most carefully revised by Col. Munro, who 
regards all the names brought under others as undoubted varieties or synonyms. I 
have in the following notes invariably put foremost the views of Grisebach (Elor. Boss.) 
and Andersson, as those of the two best and most accurate authors on Northern Grasses 
with whom I am acquainted. Andersson's in particular is an excellent work in all re- 
spects ; he keeps up many critical species, but indicates in all cases accurately their inter- 
mediate positions, and recognizes the trivial nature of their characters. 
Alopectjrtjs ovatus, Horn., is alpinus |3. borealis of Trinius and Grisebach, in Ledebour 
(El. Boss.), according to whom the a. Scoticus does not occur in Russia. A. alpinus, L., 
does not occur in Andersson's ' Graminese Scandinavise.' 
A. Ruthenicus, Wein. This, a synonym of nigricans, Hornemann, is kept distinct by 
Eries, Andersson, and Grisebach. Eries says of a variety pusillus, " fere A. alpinus, Sm.; 
again, of nigricans, " A. pratensi valde affinis." 
A. aristulatus, Mich. Kept distinct by Asa Gray ; it is the geniculars, var. /3, of Tor- 
rey's Elora. 
A. fulviis, Sm., is kept up by Grisebach and Eries. It is considered the same as aris- 
tulatus in ' Elor. Bor.-Am.' Andersson says of it # "A. geniculato valde aflinis ejusque 
vncietzti fluitanti nimium similis." 
