164 Rhodora [SEPTEMBER 
long." In the American plant, on the other hand, fronds only 3 feet 
long would be considered small, those of 5 or 6 feet in length being 
common, while luxuriant fronds are said to exceed 10 feet (3 m.). 
The pinnae of the American plant vary, according to luxuriance, 
from 2-7 inches (5-18 cm.) in length, and the stipe of the sterile frond | 
from 22-14 inches (7-35.5 em.) in length. 
Departing from the European Matteuccia Struthiopteris in nearly 
all details and quite isolated from it, the North American plant seems 
to be, as treated by the earlier students of our flora, a distinct American 
species which should be called 
MaTrEUCCIA nodulosa (Michx.) n. comb. Onoclea nodulosa 
Michx. Fl. Bor. Am. ii. 272 (1803) as to description and type-specimen, 
not as to synonyms and habitat; Schkuhr, Krypt. Gew. i. 96, t. 104 
(1809). | Struthiopteris pensylvanica Willd. Sp. v. 289 (1810). 5. 
nodulosa Desv. Mém. Soc. Linn. Paris, vi. pt. 2, 287 (1827). S. ger- 
manica, var. pensylvanica Lowe, Ferns, Brit. and Exot. ii. 138 (1862). 
Gray HERBARIUM. 
THE HEMLOCK SPRUCE. 
OLIVER A. FARWELL. 
In Ruopona for March, 1915, Mr. Alfred Rehder published a criti- 
cism of my paper on "the correct name of the Hemlock Spruce" 
which appeared in the issue of the Bulletin of the Torrey Botanical 
Club for December, 1914. I shall not attempt to answer the salient 
points of his discussion in the order in which they are given but will 
take analogous but non-contiguous features, and bring them together 
in order to show as clearly as possible the inconsistencies and fallacies 
of his statements and conclusions. 
In dealing with specific ‘names and the species which they represent 
two axioms are in general use. The first is that any species which 
has had the type specifically mentioned or designated by the author 
stands or falls with that type; the author’s specific name cannot be 
transferred to another plant. The other is that where the type has 
1 Asch. & Graebn. Syn. i. 48 (1896). 
