oblong-elliptic, elongate, 0.8-1.5 mm long; whorled white pappus may be present; small, conical nipple on truncate end
oblong, lens shaped in cross section, 2-4 mm long; long, sturdy, persistent style beak about as long as body
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
oblong-cylindric, 0.5-1 mm; reticulate surface; marked by lengthwise line; pointed it at one end
globose, ~ 1 cm across; somewhat resembles an acorn; seed wall very hard
lens shaped achene, 2-4 mm long; smooth, shiny, dark brown
lens shaped achene, 2-4 mm long; smooth, shiny, dark brown
obovate, 0.5-1.5 mm; strongly 7 veined; often purple
flattened trigonous, 0.5-1 mm long; short beak; very long bristles easily attach/tangle
triangular, 5-10 mm long; three chambered, only one chamber develops seed;ridged; horned at base
oval, ~0.5 mm long; dark terminal appendages tapering at ends; cellular reticulations clearly visible in cell wall
elliptic, 3.5-5 mm long; lengthwise ridge is diagnostic of seed
ovate-elliptic, 3-4 mm; 20-25 lengthwise lines (not visible in imaged specimens); top of seed depressed
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
reniform with a straight edge; 1-1.5 mm long; seam bisecting arched side of seed
subfossil specimen; obovate, 0.5-1.5 mm; prominent indent at base of seed characterstic of Glyceria; 2 persistent, recurv...
lens-shaped, light to dark brown or olive, shiny, 1-1.5 mm long; tubercle (cap on top of seed) flattened-triangular, abou...
brown, 3 angled. 0.5-1 mm long
lanceolate, thin and scalelike with wings, 3-5.5 mm long, 1-1.5 mm wide; inner face distinctly veined; wings narrowed bel...
trigonous, 1.1-1.4 mm long, style base persistent
obovate, 2-4 mm long; beak projecting vertically, 1-1.5 mm; narrowly winged relative to other Sagittaria spp.
