unequal glumes; prominent veins on longer glume
unequal glumes; prominent veins on longer glume
rounded, 3 angled, ridged, up to 1 mm long; tubercle (cap on top of seed) cone shaped, constricted at base
brown, 3 angled, 1-2 mm long, less than 0.5 mm wide at broad end
obconic, inflated, body 3.5-6 mm, beak 2-3.5 mm; 2 strong ribs at summit, otherwise very sparsely and obscurely veined; b...
obovate, mostly straight, though sometimes beak is reflexed; 2.2-3.3 mm long; irregularly veined, with 2 prominent margin...
ellipsoid to obovoid, 3-5 mm long, 2-3 mm wide; rounded on one side and compressed-angled on other; circular hole at base...
common species with broad range and variable morphology; 1-2 mm long, yellow to brown; tubercle (cap on top of seed) flat...
elliptic, 1.5-3 mm long; differentiated from Sagittaria by marginal groove and lack of beak
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...
obovate, flat on one side, convex on other, 2-3 mm long, beak (on broad end of seed) up to 5 mm long, bristles (hairs) no...
flat on one side, convex on other, 2-3 mm long, beak (on broad end of seed) up to 0.2 mm long, bristles (hairs) not alway...
tan to white, 3 angled; ~ 1mm long, beak (on broad end of seed) ~0.2 mm long, bristles (hairs) not always present
ellipsoid trigonous with sinous, persistent style; 2.2-3 mm long, 2.5 times as long as wide
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.
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
floret awl-shaped, 1-2 cm long, tapering to an awn 3-6 cm long; seed oblong, 1-2 cm long
