Character States for E. palustris complex

  Culms Distinctly Compressed/
Terete
Distal Leaf Sheath Apex # Floral Scales per mm of Rachilla Proximal Scale Clasps How Much of Culm Proportion Subproximal Scales Without Flower Flattened Floral Scale Dimensions in mm # of Perianth Bristles Perianth Bristles Relative Size Achene Apex Neck Achene Surface Tubercle Dimensions in mm Tubercle Size Compared to Achene Tubercle Height to Width Tubercle Surface # Chromosomes (2n) Location
Palustris terete or slightly compressed apex broadly obtuse to acute, tooth absent 48 2/3 or sometimes 3/4 of culm subproximal scales 12, empty 35 1.52.5 4(5), sometimes absent much shorter than achene to equaling tubercle, rarely to 2 times as long as achene neck absent or mostly short (to long) smooth at 30X, sometimes finely rugulose at 1020X and with 20 or more ridges in vertical series 0.30.7 0.350.7   as high as wide to 2 times higher   2n = 16, 17, 36  SK
Mamillata terete, often with 814 blunt ridges when dry apex obtuse, tooth absent 5 2/3 of culm subproximal scale empty 2.54 1.52 (4)56(8) mostly exceeding tubercle, to 2 times longer than achene neck absent smooth at 30X 0.20.6 0.40.6   lower than to as high as wide   2n = 16 probably SK
Macrostachya Culms terete to markedly compressed, to 3 times wider than thick, often with to 25 blunt ridges when dry apex truncate to obtuse, tooth sometimes present on some or all culms 35 (2/3)3/4 or more of culm to amplexicaulous subproximal scale empty or with flower, usually empty in some spikelets and with flower in other spikelets in same plant 2.55.5 1.52.5 4(5), sometimes rudimentary or absent much shorter than achene to equaling tubercle neck absent or short smooth at 30X, or finely rugulose at 1020X with 20 or more horizontal ridges in a vertical series 0.350.7 0.250.7   as high as or sometimes much higher than wide   2n = 18, 19, 38, 10?, 16? AB,  MB, probably SK
Erythropoda Culms terete, often with 812 blunt ridges when dry apex broadly obtuse to subacute, tooth sometimes present, to 0.1 mm 45 proximal scale amplexicaulous subproximal scale with flower 23.5 1.51.7 4 or absent equaling achene to slightly exceeding tubercle neck absent to long smooth at 30X, or sometimes finely rugulose at 1030X with 20 or more horizontal ridges in a vertical series 0.350.65 0.20.6   much higher than wide to, lower than wide   2n = 16, 18, 19, 20 SK
Uniglumis Culms terete, often with some blunt ridges when dry apex  obtuse to subacute, tooth absent 34 proximal scale amplexicaulous subproximal scale with flower 34 1.82.5 04(5) rudimentary to equaling achene neck absent or short smooth at 30X, or sometimes finely rugulose at 1020X with 20 or more horizontal ridges in vertical series 0.40.8 0.30.8   much higher than wide to slightly depressed sometimes spongy and with vertical rows of depressions 2n = 27?, 28? AB, MB,
probably SK
Kamtschatica Culms terete, often with to 10 blunt ridges when dry apex  broadly obtuse to narrowly acuminate, tooth absent 12 proximal scale amplexicaulous subproximal scale with flower 2.55 22.5 06(9) often unequal, much shorter than to equaling achene neck absent or very short finely reticulate at 2030X, or rugulose with 20 or more horizontal ridges in a vertical series, or sometimes smooth (0.5) 0.71.5 (0.5)0.81.4     usually with vertical rows of depressions (cancellate) 2n = 12 coastal habitats only, MB
Ambigens Culms terete, often with to 16 blunt ridges when dry apex  obtuse to subtruncate, tooth sometimes present on some culms, to 0.3 mm 34 proximal scale amplexicaulous subproximal scale with flower 2.53.5 1.7 24(5) usually very unequal, rudimentary to equaling achene neck absent (to very short finely rugulose at 1020X, with 20 or more horizontal ridges in vertical series and/or finely cancellate at 1030X. 0.150.3(0.5) (0.3)0.40.6   depressed, rarely some as high as wide   2n = 44, 45, 46 Coastal (rarely inland), not in western Canada