388 WILLIAMS: CALYMPERACEAE OF NorTH AMERICA 
showing about two rows of guide-cells with an indefinite number 
of smaller accessory cells and stereid cells in one or two rows at 
the upper and under surface; leaf-cells pale throughout, very 
mamillose on the upper surface and smooth or papillose on the 
under side to the cancellinae, the median cells hexagonal to round- 
ish, about 8 uw in diameter; teniolae one to three cells in from the 
margin, usually extending from the upper part of the base of the 
leaf to above the middle, and consisting of a double thickness of 
one or two rows of elongate, often highly mamillose cells; cancel- 
linae mostly broad and more or less rounded above; inner peri- 
chaetial leaves rather longer than stem-leaves and with a smaller 
base, the archegonia and filiform paraphyses numerous; obclavate, 
eight- to ten-celled propagula sometimes occur in clusters at the 
apex of the costa. [FiG. 2.] 
TvPE collected in the Sierra de Gavilanes, Santa Clara Province, 
Cuba, August, 1906, Brothers Leon & Clement 6773 (herbarium 
of the New York Botanical Garden). 
The peculiar cross-section of the leaf of this species is very 
similar to that of C. Dozyanum Mitt. of Java. 
3. CALYMPERES EMERSUM C. Miill. Bull. Herb. Boiss. 5: 189. 
1897 
In broad, lax, dull-green tufts with stems about 1.5 cm. high; 
stem-leaves about 4 mm. long, mostly incurved, scarcely crispate 
when dry, from a somewhat wider, or in the lower leaves narrower, 
oblong or obovate, serrulate base extending into a broad, oblong- 
linear point, from not much longer than basal part to about twice 
longer, with rather abruptly acute, serrulate apex and costa vanish- 
ing just below apex or when bearing propagulae, excurrent and 
enlarged into a stout rough point with the propagulae on all sides 
near apex; costa in middle of leaf about one tenth the width of 
leaf, rough on both sides in upper half, in cross-section showing 
four to six guide-cells, stereid bands above and below and outer 
cells differentiated on both sides; blade of leaf highly mamillose 
and papillose on upper side, the under side not mamillose but 
finely papillose; cells throughout spreading leaf-blade distinct, 
scarcely or not elongate, angular to roundish, 7-8 u in diameter, 
with one or sometimes two papillae on each surface; teniolae 
extending from or near the base to near the abruptly narrowed 
apex and only one or two cells in from margin in upper leaf, and 
four to eight cells in from margin at the broadest basal part; 
cancellinae often extending nearly one half up leaf next costa an 
terminating in acute angles; “theca hardly. emergent, calyptra 
finely roughened at apex.”—C. Miuiller. [F1c. 3.] 
