56, 
3. Spikelets many-flowered (if only 1-flowered, the spikelets 
in densely glomerulate heads with 2-ranked scales), with 
1 of the lower scales empty (more in Eriophorum). 
4, Scales of spikelet strictly 2-ranked, folded 
lengthwise and keeled. 
5. Inflorescences terminal simple or compound umbels 
or glomerules; flowers without perianth bristles; 
achene without a tubercle or enlarged style-base..... Cyperus 
5. Inflorescences axillary, from leaf sheaths; 
flowers with a perianth of bristles; achene 
capped by a long tubercle. Expected (Dulichium). 
4, Scales of spiklet spirally arranged (sometimes 2- 
ranked in Eleocharis, with single terminal spikelets). 
5. Achene crowned by a persistent bulbous tubercle. 
6. Culms naked, the basal colored sheaths 
usually bladeless; spikelet terminal; 
perianth of bristles) often Present: ee <a sja'e orelee: si ere 
6. Culms leafy or leafy-based; spikelets 2- 
many, in terminal or axillary inflorescences 
with leafy involucres; perianth wanting. 
Expected (Bulbostylis, Psilocarya). 
5. Achene without a tubercle (Scirpus may have a small 
point on the achene, left by the fallen style). 
7. Flowers with one or more inner subtending’ scales 
or with dilated sepals. Expected (Hemicarpha). 
7. Flowers without inner subtending scales or 
dilated sepals (may have bristle perianth). 
8. Style dilated at base, deciduous below the 
enlargement; perianth wanting. Expected 
(Fimbristylis). 
8. Style terete, slender; perianth usually present. 
9. Perianth of 1 to 6 broad bristles. (Also, 
spikelets with an involucre of 1 erect or 
severaligspreading eaves iayer. stele sieles «cess 6 es 
9, Perianth of many long silky bristles. 
Expected (Eriophorum). 
. Eleocharis 
