2-4 mm long; smooth; shortly awned; finely hairy
linear oblong, 1.5-2 mm long; dry, glabrous; pappus may or may not be present
lens shaped, 2-3 mm long; smooth, shiny
ear shaped, arched, with rounded back and straight to concave edge, shaped similar to Potamogeton; ~ 1 mm long
flattened elliptic, 5-8 mm long; split on one side where seeds released
elliptic, ~2 mm long; cellular reticulate; light, corky texture
compressed-oblong, rounded triangular in cross section 1.5-3 mm long; rounded side is ridged lengthwise; cross ridges als...
common species with broad range and variable morphology; 1-2 mm long, yellow to brown; tubercle (cap on top of seed) flat...
brown, 3 angled, 1-2 mm long, up to 0.5 mm wide at broad end
ellipsoid to obovoid, 3-5 mm long, 2-3 mm wide; rounded on one side and compressed-angled on other; circular hole at base...
spindle shaped, 5-7 mm long; abruptly contracted to a beak 1-3 mm long
obovate, flat on one side, 2-4 mm long; conspicuously ribbed
flattened trigonous, 0.5-1 mm long; short beak; very long bristles easily attach/tangle
ovate, 0.3-0.5 mm long; dark terminal appendage at top of seed; cellular reticulations clearly visible in cell wall
obovate, 0.5-1.5 mm; strongly 7 veined; often purple
reniform with a straight edge; 1-1.5 mm long; seam bisecting arched side of seed
obovoid, 4-5.5 mm long, 2-3 mm wide; rounded on one side and compressed-angled on other; circular hole at base; yellow-br...
globose to ellipsoid, 2-4 mm long, 2-2.5 mm wide; slight ridge on one side and small attachment scar at base; olive green...
