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Click the number at the start of a key lead to highlight both that lead and its corresponding lead. Click again to show only the two highlighted leads. Click a third time to return to the full key with the selected leads still highlighted.

Key to Juncus, KEY C: Subkey in Juncus

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1 Culms and leaves scabrid, gray-green or blue-green; seeds 2.0-2.5 mm long
1 Culms and leaves smooth, green; seeds 0.7-2.2 mm long.
..2 Seeds 1.2-2.2 mm long, seed body < ½ length of seed.
....3 Mature capsules 3.0-4.0 mm long, < 1.5 mm longer than perianth, light reddish brown to light brown; heads 5-50 flowered
....3 Mature capsules 4.0-5.0 mm long, 2 mm longer than perianth, dark reddish purple; heads 3-7 flowered
..2 Seeds 0.7-1.2 mm long, seed body > ½ length of seed.
......4 Perianth obtuse to subacute, with wide scarious margins
......4 Perianth acuminate, with narrow scarious margins.
........5 Inflorescence open, the branches widely spreading; mature capsules dark straw colored; heads 5-20 flowered
........5 Inflorescence narrow, the branches erect; mature capsules dark brown; heads 2-7 flowered
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