352 
GRAMINE^. 
18. Phragmites. Glumes unequal, the lower much smaller. 
Florets 2 — 6, unarmed, the lower ones imperfect. Panicle 
diffuse. Styles elongate. Stigmas plumose. 
Tr. VII. CHLORIDES. Spikelets laterally compressed, 1- 
flowered in our plants and sometimes with a superior ru- 
diment, placed in 2 rows on one side of a flattened rachis. 
19- Cynodon. Spikes fingered, 1 -flowered with a superior 
rudiment. Glumes nearly equal, patent. Palese equal, outer 
boatshaped compressed embracing the inner. Styles long, 
distinct. Stigmas feathery, protruding below the summit 
of the floret. 
20. Spartina. Spikes upright, in a raceme, 1 -flowered. 
Glumes unequal, the upper long and acuminate. Palese un- 
equal, outer boatshaped compressed retuse. Styles elon- 
gated, united half-way up. Stigmas filiform, protruding at 
the summit of the floret. 
Tr. VIII. SESLERIEJE. Spikelets laterally compressed, many- 
flowered, without hairs. Styles 0 or very short. Stigmas 
very long, filiform, protruded from the summit of the florets. 
21. Sesleria. Panicle spiked; spikelets sessile, tiled all 
round. Glumes 2 — 6-flowered, nearly or quite as long as 
the spikelet. Outer palea keeled, membranous ; with a 
scarious margin, ending in 3 or 5 points, dorsal rib eva- 
nescent. 
Tr. IX. A VENINEJE. Spikelets with 2 or more florets (except 
in Lagurus), upper often barren. Glumes as long (or nearly) 
as the spikelet. Fl. usually surrounded by stiff hairs. Awn 
twisted and kneed. 
22. Aira. Panicle lax. Glumes 2-flowered, with or without 
the rudiment of a third (which is sometimes perfected in 
A. cmspitosa) . Outer palea with or ivithout very faint late- 
ral nerves, awned. Awn dorsal, kneed (in A. ceespifosa 
straight). Ovary glabrous. Fr. neither crested " nor fur- 
rowed." 
23. Corynephorus. Awn clubshaped, straight, jointed in 
the middle, the upper portion clavate, a tuft of hairs at the 
joint. Otherwise like Aira. 
24. Lagurus. Panicle spiked. Glumes 1- flowered, scarious, 
ending in a long fringed seta. Outer palea ending in 2 long 
setae and with a dorsal geniculated twisted awn. 
25. Trisetum. Spikelets crowded. Glumes 2 — 6-flowered. 
Outer palea with faint lateral nerves, ending in 2 acute teeth. 
