380 WILLIAMS: CALYMPERACEAE OF NortH AMERICA 
extending from base to apex, or sometimes nearly or quite disap- 
pearing in the upper one fourth of leaf, the border mostly with 
small, irregular often geminate teeth to near the base; costa per- 
current, 50-125 u wide and about one seventh the width of leaf 
one half up from base, slightly serrulate on back in upper part 
and papillose on upper side from near cancellinae half way or more 
to apex, in cross-section showing about seven guide-cells with 
stereid bands above and below and outer cells mostly differentiated 
on upper side; cells throughout upper part of leaf rather indistinct, 
scarcely elongate, 6-7 w in diameter, with usually 2-4 minute 
papillae on either surface; cancellinae broad, not entirely filling 
the basal part of leaf, terminating above in mostly acute angles; 
older stem-leaves often with numerous, slender, cylindrical pro- 
pagula, 200 to 300 uw long, with about twelve cross-walls, growing 
from cells of blade near either side of costa a little above the can- 
cellinae on the ‘upper surface of leaf and extending half way or 
more to the apex. [Fic. 14.] 
Type collected in Jamaica, growing on bamboo joints, Wood- 
stock, Westmoreland Hills, September, 1907, EZ. G. Britton 579 
(herbarum of the New York Botanical Garden). 
DisTRIBUTION: known only from the type locality and Sierra 
Nipe, Cuba. 
This is somewhat like S. flexifolius Mitt., but the cells are 
smaller, more obscure, less elongate, and densely papillose—not 
smooth or nearly so, as in S. flexifolius. 
15. SYRRHOPODON ELONGATUS Sull. Proc. Am. Acad. 5: 280. 
1861 
Evidently dioicous, male flowers not found: in tall, compact, 
pale green to brown tufts with erect stems up to 12 cm. high, often 
bearing at the apex two to four short, fruiting branches with 
spreading-flexuous to somewhat squarrose leaves from a conspi- 
cuous, imbricate, whitish base and abundant tomentum on both 
stems and leaves; leaves of stem and branches, from an oblong 
base about 2 mm. long, somewhat spiny-dentate above, narrowed 
to a recurved, grooved, twisted and flexuous or nearly straight 
point about 3 mm. long, spiny-dentate above and slightly serrulate 
on the pale, cylindric border below to the enlarged base; costa 
excurrent into a thorn-point, about 50 u wide near the middle, 
smooth on inner face, spiny-dentate about one half down on the 
back, in cross-section showing four guide-cells, stereid bands 
above and below, with outer cells not differentiated; cells through- 
out upper part of leaf distinct, roundish or slightly elongate, 
