—107— 
Hypnaceae, where several species may be mingled in the same tuft, by far 
greater care is to be used than in the case of say Mnium hornum, which is 
usually found in pure tufts. 
Under all circumstances, the members of the Sullivant Moss Chapter 
should take especial pains in the matter of the specimens offered by them for 
distribution. First, be sure the specimens sent out are real duplicates, not a 
lumping of two or three different collections which you “guess” are the 
same. Secondly, when having specimens determined by another, send large 
quantities; if you are not familiar with the species send all the material you 
propose to use in the distribution. Thirdly, be scrupulously exact in citing 
the authority for the determination ; don't endanger another’s reputation by 
your own carelessness. Washington, D. C. 
ENCALYPTA PROCERA BRUCH. 
E. J. Hill. 
The finding of a sterile Encalypta on rocks at Lockport, 111., in 1904, led 
to a correspondence with Mrs. E. G. Britton regarding its specific character 
In 1889 I had collected E. procera in fruit on Presque Isle, Marquette, Mich 
The question arose whether this might not be E. streptocarpa Hedw. (E. 
contorta (Wulf. ) Lindb. as now called from an older specific name), or some 
other member of the genus. The specimens from Presque Isle consisted of 
one fruiting and a few sterile stems found in a tuft of Distichium capil- 
laceum. The peristome of the capsule was unfortunately injured while 
examining it, but enough remained combined with other characters to lead 
to its identification as stated. A recent comparison with the barren stems of 
E. procera from British Columbia and fruiting plants of E. contorta from 
two stations in Europe sent by Mrs. Britton, which have a different capsule, 
strengthened this conclusion. A further search led to the detection of 
antheridia on the stem of the fruiting specimen showing that it is monoe- 
cious as is the case with E. procera. The Distichium with which it grew 
was abundantly fruiting, some barren stems of Myurella Caryana were 
also in the tuft.^. 
The specimens from Lockport being sterile, the vegetative character can 
only be used to determine the species. Comparing the leaves the same type 
is seen in the plants from the three American localities. The leaf of E. 
contorta is longer and relatively narrower than in E. procera which is 
broader towards the top, more decidedly Ungulate, sometimes subspatulate. 
The costa of the latter usually ceases further from the apex. The cells of the 
basal hyaline part are larger especially near the costa than those of E. con- 
torta and at times approach a square form. The leaf characters of the two 
are well shown in the figure in Roth’s Europaischen Laubmoose Taf. XLI. 
From the evidence the specimens best agree with E. procera. 
The stems of these mosses are well provided with propagula. It was 
noticed at the time of identifying the plants from Presque Isle, and a refer- 
ence in a note under E. procera in Schimper’s Syn. Mus. Eur. states that 
