351 
91. CYPERACE.®. 
channeled their u])per half triangular, nut ellijrtic-acuminate or 
ol)ovate triquetrous. — E. B. 5(>4. St. 10. R. viii. 689. 690. E. 
angustifolium Sm. — Tall and rather slender. L. triangidar through 
more than half their length. Bristles 3 or 4 times as long as the 
spikes. — ji. elegum-, st. and l.very slender. E.gracileSim., E.B. 
2402, not Koch. An alpine form of this variety (found in spongy 
rills on Ben Lavvers, S.j often has but one nearly sessile spike. 
— y. elatius (Koch); st. strong tall, 1. 2 — 3 lines broad the tri- 
angular part eommeneing above the middle, bristles about 3 times 
as long as the spikes. E. polystachion Sm. Eng. El. i. 67. — 
Bogs. fi. in mountainous districts, y. rather rare, more common 
in Ireland. P. Y. V'l. Common Cotton-grass. 
5. E. latifolium (llo\)-pe) ; st. triquetrous in its upper half, 
peduncles scabrous, 1. linear nearly flat contracted above the mid- 
dle into a triangular point, nut obpyriform triquetrous. — St. 10. 
R. viii. 691. 692. E. pubescens Sm., E. B. S. 2633. E. poly- 
stachion E. B. 563 ? — A tall rather slender plant. L. about 2 
lines broad, triquetrous point short. Several of the elegant 
spikes upon longish stalks which are not dow'ny but scabrous. 
Bristles 2 or 3 times as long as the spikes. — Bogs, rather rare. 
P.V. VI . 
6. E. gracile (Koch); st. somewhat triquetrous, peduncles 
downy, 1. narrowly-linear triquetrous, nut oblong-Zmear trique- 
trous. — E. B. S. 2886. R. viii. 687. 688. E. triquetrum Hoppe, 
St. 10. 2.^ — A tall slender plant. Spikes about 4, most of them 
on downy not scabrous stalks. Glumes with many ribs. Bristles 
about twice as long as the spike. — Bogs. Near Ilagnaby, York- 
shire. Mr. Jos. Woods. White-moor Pond near Guildford. Mr. 
Borrer. P. VI. VII. E. 
Tribe III. Elynete. 
9. Kobresia Willd. 
1. K. ccrricina (Willd.). — E. B. 1410. Sclik. Rrr. 161. R. viii. 
t. 193. — St. erect, 6 — 12 in. high. L. slender shorter than the 
stem. Spikes 4 — 5, aggregated at the summit of the stem, 
6 — 8-flowered. There is often an abortive stam. (?) at the base 
of the nut. Some authors consider each fl. as a separate spike, 
and the rudiment as representing a second flower. Nees von 
Esenb. figures 2 scales to the perigone, but I have only seen one. 
— Moors. Yorkshire. Durham. Perthshire. P. VII. E. S. 
