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Key to Rhynchospora, Key A: beaksedges with tubercles 3-23 mm long
[subgenus Haplostylae; sections Longirostres and Polycephalae]
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2 Spikelets arranged in subglobose, umbel-like clusters; achene margins crimped; tubercle narrowly conic, 3-4 mm long (of similar length to achene body); plants not rhizomatous; [section Longirostres] |
1 Spikelets in > 4 paniculate or corymbose clusters; tubercle 10-23 mm long; leaf blades 6-20 mm wide; [section Longirostres]. |
4 Plants rhizomatous; primary clusters with 1-6 loosely clustered spikelets; achene (3.5-) 4.0-4.8 mm long. |