66 AMERICAN FERN JOURNAL 
E. laevigatum. In the meantime Farwell (7) does not 
see to understand why the writer should take such a 
position. He says: “It seems rather peculiar to me 
that Engelmann, who supplied the material for the 
description and who as translator and editor of Braun’s 
MSS, is the sponsor, in a measure, of the species, should 
have so misunderstood his own species as to have mis- 
applied it and to have permitted such misapplication 
in our manuals without having called the attention of 
their authors thereto. A careful study of the original 
description will show that Braun’s species has not been 
misunderstood, that his description applies to the an- 
nual-stemmed plant that has been passing under Braun’s 
name.”’ As to whether this latter statement is correct 
or not can be determined by reading Engelmann’s trans- 
lation of Braun (1). The species is characterized as 
follows: 
“‘Kiquiseta stichopora (winter-Equiseta). Stomata dis- 
posed in two distinct ranges on each side of the groove; 
each range formed by one or more rows of stomata. 
(All known species in this division have hardy evergreen 
stems). 
Homophyadica. 
Ranges of stomata consisting each of one row. 
7. E. laevigatum A. Braun. 
Stems tall, erect, simple or somewhat hranching;..- 
sheaths elongated, adpressed, with a black limb, ete. 
In size and manner of growth this new species is 
closely allied to EZ. hyemale, and the larger variety of E. 
robustum, but it is easily distinguished by its smoothness, 
its long green sheaths, with a narrow black limb, and its 
darker green color.” 
The description is quite accurate except that the color 
is usually not darker green than in E. hiemale and the 
sheaths are usually dilated above. 
As to the statement that Engelmann might have 
called attention to any misplacement of the name E. 
fe Tae ct el lel es 
