—3i — 
a matter of interest both geographical and botanical. It also constitutes an' 
argument for the specific value of Mr. Cardot’s plant, unless it be admitted 
that a hybrid may exist, and persist, for several thousand, even several times 
ten thousand years, in such widely separated areas. And further, the sub- 
stratum for G. leucophaea, so far as the writer’s observations go, is trap and 
granitic rocks ; G. glauca occurs here on the sedimentary dolomitic lime- 
stone of Lower Silurian age. Nor yet could hybridization have taken place, 
at least so far as the American station goes to show: the knoll near Lewis- 
ton, E. Minn., is over a hundred miles from either of the Minnesota stations 
known to the writer. Whether the degree of isolation and substratum, of 
this plant of the French station, agrees with the above data, it will be inter- 
esting to learn from Mr. Cardot. 
Following is Mr. Cardot’s description translated from Rev. Bryol, 1905, 
pp. 17-18: 
“Plants forming dense tufts or cushions, not cohering, of a glaucous- 
green color when dry. of a lively green when moist. Stems simple or divided 
from the base, 5-10 mm. long. Leaves straight, closely imbricated when 
dry, lanceolate, long, and gradually tapering-acuminate nearly from the 
base, quite concave, channelled above, terminating in a short-toothed hair ; 
about 2 mm, long, .6-75 mm. wide : borders plane, quite entire ; blade in all 
the upper portion, except on the borders, formed of two layers of small very 
chlorophyllose cells rounded or subhexagonal seen in a face view, but higher 
than wide seen in cross section ; cells of the basilar portion in a single layer: 
at the angles are found numerous transversely enlarged cells, disposed in 
regular rows, becoming then square and passing gradually into the small 
cells of the upper leaf part; costa depressed, formed at the base in a cross 
section of two layers of the epidermal element analogous to the cells of the 
blade, between which is observed a layer, more or less developed, of smaller 
cells with thicker walls; the costa becomes indistinct towards the apex, 
where it is ordinarily reduced to a single cell lying between the two halves 
of the blade. 
“ By its leaves with plane margin, by its tissue, and by the structure of 
the costa, this moss evidently leans strongly toward G. leucophaea. But it 
is easy to distinguish the plant by the shape of the leaves; while in G. 
leucophaea they remain quite broad to near the apex, where they are 
abruptly narrowed into a very long hair, in G. glauca they are narrowed 
gradually and end in an elongated apex overtopped by a short hair. This 
last character, it is true, is not of great value, for forms of G. leucophaea with 
short hair points are quite frequently met with ; but the form of the upper 
part of the leaf is quite distinctive, and does not permit of confusing G. 
glauca with G. leucophaea .” Winona, Minn. 
Miss A. L. Crockett, Camden, Maine, has discovered that through a mis- 
understanding at the Post-office a letter from a Sullivant Moss Chapter 
member to her was returned to the sender as unclaimed. If any others were 
similarly treated will they please write again. 
