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...
elliptic, 1.5-3 mm long; differentiated from Sagittaria by marginal groove and lack of beak
oblong-elliptic, elongate, 0.8-1.5 mm long; whorled white pappus may be present; small, conical nipple on truncate end
subfossil specimen; obovate, 0.5-1.5 mm; prominent indent at base of seed characterstic of Glyceria; 2 persistent, recurv...
oblong, lens shaped in cross section, 2-4 mm long; long, sturdy, persistent style beak about as long as body
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
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
elliptic, 3.5-5 mm long; lengthwise ridge is diagnostic of seed
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...
