386 WILLIAMS: CALYMPERACEAE OF NORTH 
cells in from margin in upper basal 
part of leaf; cancellinae mostly broad 
and rounded above. 
Costa as wide or wider at the base than 
half way up. 
Costa about one half as wide at the base 
’ as half way up 
Mamillose cells terminating in one or two 
small papillae; teniolae four to eight 
cells in from sola in upper basal 
i part 
Giabicdatince terminating in acute ‘icilés 
next costa; leaf-base not much 
broader than blade above. 
Cancellinae terminating in broad angles 
or rounded above; leaf-base two or 
three times wider than blade above. 
Green cells of blade about 4 yu in diameter, in 
fifty to one hundred rows in widest part of 
of leaf; teniolae usually six to twelve cells in 
from margin in lower eat and — to 
. insertion of leaf. 
Teniolae very short or wanting, only found in 
upper basal part of leaf when present. 
Upper side of costa rough to near cancellinae 
and teniolae present. 
Upper side of costa smooth except near apex 
and teniolae wanting. 
Leaf-margin entire above and below or sghely ser- 
rulate near apex o 
No teniolae; costa rough on both sides to below 
the middle. 
Teniolae short, but cea distinct in upper base; 
osta smooth, or nearly so, to apex. 
Leaf-cells distinctly transversely elongate except in the 
small basal part; the spreading leaf-blade nearly 
straight or somewhat flexuous, rarely somewhat 
crispate, eight to fifteen times longer than the 
w clasping base; guide-cells of costa in two or 
three rows. 
Leaves up to 15 or 18 mm. long; teniolae mostly more 
or less evident in basal part; stems under 6 mm. 
long. 
Leaves up to 8 or 10 mm. long; teniolae wanting; 
stems usually much more than 6 mm. high. 
Without cancellinae; teniolae finely developed. 
AMERICA 
1. C. Richardi. 
2. C. cubense. 
3. C. emersum. 
' 
4. C. disciforme. 
5. C. Donnellii. 
6. C. nicaraguense. 
7. C. Heribaudi. 
8. C. Nashii. 
9. C. Guildingit. 
ie: C. lonchophyllum 
11, C. Levyanum. 
12. C. fluviatile. 
1. CALYMPERES Ricuarpi C. Miill. Syn. 1: 524. 1849 
Calymperes Breutelii Besch. Ann. Sci. Nat. VIII. 1: 278. 1895: 
Calymperes guadalupense Besch. Ann. Sci. Nat. VIII. 1: 285. 1895. 
