Mr. Tuckerman, on some Plants of New England. 33 
Alnus rubra, Marsh. Arb. p. 20, (ex Darlingt., descr. que.) 
Betula serrulata, Ait. Kew. edit. 1, 3, 338. Betula-Alnus serru- 
lata, Michx. Fl. 2, 181. Alnus serrulata, Willd. Sp. 4, 336, 
auctique. B.incana, 6. Hook. Bor. Amer. 2, 157. 
Hab. Northern, Middle, and Western States, Michx. f. New 
England to Carolina. A straggling shrub, 6-15 feet high, grow- 
ing in close thickets. Leaves obovate, acute at base, thick and 
somewhat coriaceous, and rough-veined beneath. Appears very 
different from A. incana. Is it not possible that Hooker’s arrange- 
ment above cited, was founded upon specimens of our A. incana, 
incorrectly referred to the present species? It is a well known 
fact that the two have long been confounded in this country. 
The name of our own botanist should have the priority: his 
description, though short, notices the most striking features of 
the species, and cannot be mistaken. ‘The A. rubra of Bongard, 
is many years later. Add to this, that Marshall’s name is far 
more expressive and apt than that of Aiton. 
A. crispa, (Michx.): foliis ovalibus acutis basi obtusiusculis 
duplicato-serratis, pubescentia molli glutinosa indutis s. glabrius- 
culis venis axillisque villosis, amentis foemineis longe pedicellatis 
ovalibus, stipulis late ovatis. E. 'T.—Betula crispa, Ait. Kew. 
edit. 1, 3, 339, (ex Gray, N. Carol. 43.) Betula-Alnus crispa, 
Michz. Fl. 2,181. Alnus undulata, Willd. Sp. 4, 336, Muh. 
Catal. 89. 
Hab. Newfoundland and Hudson’s Bay, Aiton; Canada, Mi- 
chaux; New England, (ex Cutler, forsan,) Muhlenberg. White 
Mountains, sides of the Notch hills, and on the plain of the Am- 
monoosuck. Also in the alpine regions, E. 'T'.; high peaks 
of the Green Mountains, Vermont, Dr. Robbins, ( Oakes, Catal. 
Verm. 25;) mountains of Essex, N. Y., Mr. Macrae. Aiton’s 
description, though less perfect than that of Michaux, seems 
to answer to our plant, and is considered as belonging to it, by 
Dr. Gray, (I. c.) It is our handsomest species, and remarkable, 
except in the alpine state, for the soft pubescence of its leaves, 
which are also, and particularly on the lower surface, besprinkled 
with glutinous particles. From oval, the characteristical form, 
the leaves vary, occasionally, to broad ovate and even cordate. 
The aments are on somewhat long pedicels, and add much to 
the elegance of the shrub. ‘The alpine state has smaller and 
more glabrous leaves. ‘To this last, Alnus Mitchelliana, Curt. 
Vol. xtv, No. 1.—April-June, 1843. 5 
