— 32 — 
P. lacunosum (Ach.) Nyl. 
P. Oakesianum (Tuck.) Nyl. On balsams and mountain ash at the sum- 
mit; at the camp grounds on yellow 
birch and balsams. 
Pyxine sorediata (Ach.) Fr. On balsams at the summit. 
Stereocaulon paschale (L.) Fr. On rocks at the summit and on Stony Ledge. 
Umbilicaria Muhlenbergii (Ach.) Tuck. Rare on rocks at Stony Ledge. No 
Umbilicarias were seen about the 
summit. 
Usnea florida (L.) Hoffm. On balsams at the summit. 
Hudson Falls, N. Y. 
“THE CATKIN-HYPNUM, WITH LONG HOSES.’’ 
“Hypnum julaceum, perichaetio setas paene aequante.” 
In this quaint manner Prof. James Dillen, 1 of Oxford University, in the 
middle of the 18th Century, described the species which we now know as Leu- 
codon julaceus (L.) Sull. and which Linnaeus, 2 who in many cases, simply gave 
binomials to the Dillenian descriptions, without having seen the specimens, 
called Hypnum julaceum L. The specimens which Dillenius described and 
figured, were collected in Pennsylvania and Virginia by the three Johns, Bar- 
tram, Clayton and Mitchell. 
Of the Leucodons we have three species: two are endemic and have been 
frequently figured, described and compared, but strangely enough no mention 
seems to have been made of one characteristic of Leucodon julaceus, which to me 
is its most marked feature. Aside from the differences in the leaf-points, as 
figured in the Bryologist for January, 1902, L. julaceus may be known at once 
by the rounded, swollen, mamillose cells of the dorsal part of the apex, which, 
even in the young leaves of the apical branches, are unlike those of the other 
species of the genus. Leucodon br achy pus rarely shows a slight trace of it, but 
in L. julaceus their character is unmistakable. 
Austin, in his Musci Appalachiani, issued number 260 as a stoloniferous 
form of this species, collected on Red Cedars, Palisades of New Jersey; this 
“ forma stolonijera ” as he called it, varies considerably in the size and shape of 
its leaves and has since been collected by Sullivant and Kellerman in Ohio, by 
Dr. Small at Conewago, Pennsylvania, by myself in the Dismal Swamp of Vir- 
ginia, by Dr. R. M. Harper in Georgia, by Bush in Missouri, and by Chapman 
and John Donnell Smith in Florida. It seems to be only on the young stems of 
the plants, where the terminal growths have not reached complete development, 
that the leaves instead of being crowded and imbricate, as on the branches, are 
much smaller and more acuminate, as on the decumbent creeping stems of the 
older plants. E. G. Britton. 
New York Botanical Garden. 
1 Dill. Hist. Muse. 2 : 321. t. 41. f. 56. iT 4 i* 
2 Hypnum julaceum L. Sp. pi. 2 : 1130. 1753 - 
