on page 286. Plants small, medium-sized to robust, green, olive or grayish green distally, brown. Leaves ovatelanceolate, lanceolate to triangular, sharply
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dense wefts or mats, yellow-green, grayish green, blackish or reddish-brown, olive brown, or opaque gray, dull, sometimes hoary with shining hairs distally
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wide; w of the Rocky Mountains. > 19 18 Capsules dark brown or black; plants usually drying dark olive green, bronze, or blackish. Sisyrinchium angustifolium
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flowers; ovary 4-locular. Fruit a schizocarp, light green, tan, olive-brown or green, brown, redbrown, or purple, cylindric, ± ovoid to oblong, or ± globose
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greenish to brown or rarely white, not ligulate, 0.2–2.2 cm, delicate to fibrous, rarely shredding at tip, apex obtuse; blade pale green to olive-green, rarely
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America Association Culms 6.8–40 cm. Leaves: basal sheaths pale to medium brown; blades dull green to yellowish green, exceeding culms, 1.5–5.9 mm wide,
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North America Association Herbs, perennial, cespitose, dark-brown to reddish-brown or brownish olive when dry, to 4.5 dm, not glaucous. Stems simple, 0.9–2
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Plants usually forming witches brooms. Stems yellow, green, olive green, orange, or brown, 8 (–13) cm; third internode 7–11 (–22) × 1.5–2 (–2.5) mm, dominant
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petals 3 (–4), same color as stems. Berries proximally olive green, distally yellowish to reddish-brown, 3.5–4.5 × 1.5–2.5 mm. Seeds ellipsoid, 2.4 × 1.1 mm
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of North America Association Herbs, perennial, slightly cespitose, dark olive when dry, to 4.2 dm, not glaucous; rhizomes scarcely discernable. Stems simple
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small to medium-sized, in loose or dense mats, yellowish or sometimes dark olive green. Stems creeping, pinnate or irregularly branched; branches horizontally
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acute; stamens erect, (15–) 22–30 mm; filaments olive, (3–) 5–7 mm, slender; anthers straight, brown or olive, 16–20 mm, slender, dehiscence latrose; connectives
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mucilaginous. Spines (5–) 7–19 per areole, straw colored, pink, red, gray, tan, or brown, conspicuously annulate-ridged, rigid, stiff; radial spines 5–14 per areole
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wall ± brown-streaked. Megaspores white, 450–650 μm diam., cristate to reticulate with broad, jagged ridges; girdle obscure. Microspores light-brown in mass
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submerged. Rootstock nearly globose 2 (–3) -lobed. Leaves evergreen, olive green to reddish-brown, pale toward base, spirally arranged, to 20 cm, pliant, gradually
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emergent. Rootstock nearly globose 2 (–3) -lobed. Leaves evergreen, olive green to reddish-brown, pale toward base, spirally arranged, to 20 cm, pliant to rigid
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involucre; perianth white to purple-pink, 0.7–1.1 cm. Fruits olive brown or dark olive brown, narrowly obovate and tapering at both ends to obovoid, 3.1–5
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loosely caespitose, olive or yellowish green, olivaceous, olive, golden, or rufous brown to blackish green distally, brown to blackish brown proximally, sometimes
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spikes 8–30 × 1.3–4.1 mm. Scales: pistillate scales pale-brown to dark reddish-brown or purplish brown, narrow white margins, elliptic to ovate, 2.6–5.4 × 1
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tip; fruits red to reddish brown. Potamogeton nodosus 15 Larger submersed leaves acuminate at apex; fruits grayish green to olive-green. Potamogeton illinoensis
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